# HBASE Changelog

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## Release 2.2.6 - Unreleased (as of 2020-09-04)


### IMPROVEMENTS:

| JIRA | Summary | Priority | Component |
|:---- |:---- | :--- |:---- |
| [HBASE-24913](https://issues.apache.org/jira/browse/HBASE-24913) | Refactor TestJMXConnectorServer |  Major | test |
| [HBASE-24898](https://issues.apache.org/jira/browse/HBASE-24898) | Use EnvironmentEdge.currentTime() instead of System.currentTimeMillis() in CurrentHourProvider |  Major | tooling |
| [HBASE-24928](https://issues.apache.org/jira/browse/HBASE-24928) | balanceRSGroup should skip generating balance plan for disabled table and splitParent region |  Major | Balancer |
| [HBASE-24686](https://issues.apache.org/jira/browse/HBASE-24686) | [LOG] Log improvement in Connection#close |  Major | Client, logging |
| [HBASE-24912](https://issues.apache.org/jira/browse/HBASE-24912) | Enlarge MemstoreFlusherChore/CompactionChecker period for unit test |  Major | . |
| [HBASE-24854](https://issues.apache.org/jira/browse/HBASE-24854) | Correct the help content of assign and unassign commands in hbase shell |  Minor | shell |
| [HBASE-21721](https://issues.apache.org/jira/browse/HBASE-21721) | FSHLog : reduce write#syncs() times |  Major | . |
| [HBASE-24821](https://issues.apache.org/jira/browse/HBASE-24821) | Simplify the logic of getRegionInfo in TestFlushFromClient to reduce redundancy code |  Minor | test |
| [HBASE-20226](https://issues.apache.org/jira/browse/HBASE-20226) | Performance Improvement Taking Large Snapshots In Remote Filesystems |  Minor | snapshots |
| [HBASE-24757](https://issues.apache.org/jira/browse/HBASE-24757) | ReplicationSink should limit the batch rowcount for batch mutations based on hbase.rpc.rows.warning.threshold |  Major | . |
| [HBASE-24777](https://issues.apache.org/jira/browse/HBASE-24777) | InfoServer support ipv6 host and port |  Minor | UI |
| [HBASE-24696](https://issues.apache.org/jira/browse/HBASE-24696) | Include JVM information on Web UI under "Software Attributes" |  Minor | UI |
| [HBASE-24740](https://issues.apache.org/jira/browse/HBASE-24740) | Enable journal logging for HBase snapshot operation |  Minor | master |
| [HBASE-24578](https://issues.apache.org/jira/browse/HBASE-24578) | [WAL] Add a parameter to config RingBufferEventHandler's SyncFuture count |  Major | wal |
| [HBASE-24467](https://issues.apache.org/jira/browse/HBASE-24467) | Backport HBASE-23963: Split TestFromClientSide; it takes too long to complete timing out |  Major | . |
| [HBASE-24562](https://issues.apache.org/jira/browse/HBASE-24562) | Stabilize master startup with meta replicas enabled |  Major | meta, read replicas |
| [HBASE-24603](https://issues.apache.org/jira/browse/HBASE-24603) | Zookeeper sync() call is async |  Critical | master, regionserver |
| [HBASE-24205](https://issues.apache.org/jira/browse/HBASE-24205) | Create metric to know the number of reads that happens from memstore |  Major | metrics |
| [HBASE-24605](https://issues.apache.org/jira/browse/HBASE-24605) | Break long region names in the web UI |  Minor | UI |
| [HBASE-24102](https://issues.apache.org/jira/browse/HBASE-24102) | RegionMover should exclude draining/decommissioning nodes from target RSs |  Major | . |
| [HBASE-24592](https://issues.apache.org/jira/browse/HBASE-24592) | [brnach-2.2] Upgrade junit to 4.13 |  Major | . |
| [HBASE-24478](https://issues.apache.org/jira/browse/HBASE-24478) | The regionInfo parameter for MasterProcedureScheduler#waitRegions and MasterProcedureScheduler#wakeRegions should be plural |  Minor | proc-v2 |
| [HBASE-24524](https://issues.apache.org/jira/browse/HBASE-24524) | SyncTable logging improvements |  Minor | . |
| [HBASE-24483](https://issues.apache.org/jira/browse/HBASE-24483) | Add repeated prefix logging for MultipleColumnPrefixFilter |  Minor | Filters |
| [HBASE-24504](https://issues.apache.org/jira/browse/HBASE-24504) | refactor call setupCluster/tearDownCluster in TestTableSnapshotInputFormat |  Minor | mapreduce, test |
| [HBASE-24412](https://issues.apache.org/jira/browse/HBASE-24412) | Canary support check only one column family per RegionTask |  Major | canary |
| [HBASE-24455](https://issues.apache.org/jira/browse/HBASE-24455) | Correct the doc of "On the number of column families" |  Minor | documentation |
| [HBASE-24470](https://issues.apache.org/jira/browse/HBASE-24470) | Add store file info when log meessages in HStore. |  Minor | logging, regionserver |
| [HBASE-24416](https://issues.apache.org/jira/browse/HBASE-24416) | RegionNormalizer spliting region should not be limited by hbase.normalizer.min.region.count |  Major | . |
| [HBASE-24428](https://issues.apache.org/jira/browse/HBASE-24428) | Priority compaction for recently split daughter regions |  Major | Compaction |
| [HBASE-24371](https://issues.apache.org/jira/browse/HBASE-24371) | Add more details when print CompactionConfiguration info |  Minor | regionserver |
| [HBASE-24427](https://issues.apache.org/jira/browse/HBASE-24427) | HStore.add log format error |  Minor | . |
| [HBASE-24387](https://issues.apache.org/jira/browse/HBASE-24387) | TableSnapshotInputFormatImpl support row limit on each InputSplit |  Major | mapreduce |


### BUG FIXES:

| JIRA | Summary | Priority | Component |
|:---- |:---- | :--- |:---- |
| [HBASE-24656](https://issues.apache.org/jira/browse/HBASE-24656) | [Flakey Tests] branch-2 TestMasterNoCluster.testStopDuringStart |  Major | . |
| [HBASE-19352](https://issues.apache.org/jira/browse/HBASE-19352) | Port HADOOP-10379: Protect authentication cookies with the HttpOnly and Secure flags |  Major | . |
| [HBASE-24971](https://issues.apache.org/jira/browse/HBASE-24971) | Upgrade JQuery to 3.5.1 |  Major | security, UI |
| [HBASE-24892](https://issues.apache.org/jira/browse/HBASE-24892) | config 'hbase.hregion.memstore.mslab.indexchunksize' not be used |  Major | . |
| [HBASE-24897](https://issues.apache.org/jira/browse/HBASE-24897) | RegionReplicaFlushHandler should handle NoServerForRegionException to avoid aborting RegionServer |  Major | . |
| [HBASE-23987](https://issues.apache.org/jira/browse/HBASE-23987) | NettyRpcClientConfigHelper will not share event loop by default which is incorrect |  Major | Client, rpc |
| [HBASE-24871](https://issues.apache.org/jira/browse/HBASE-24871) | Replication may loss data when refresh recovered replication sources |  Major | Replication |
| [HBASE-24926](https://issues.apache.org/jira/browse/HBASE-24926) | Should call setFailure in MergeTableRegionsProcedure when isMergeable returns false |  Major | master, proc-v2 |
| [HBASE-24884](https://issues.apache.org/jira/browse/HBASE-24884) | BulkLoadHFilesTool/LoadIncrementalHFiles should accept -D options from command line parameters |  Minor | . |
| [HBASE-24844](https://issues.apache.org/jira/browse/HBASE-24844) | Exception on standalone (master) shutdown |  Minor | Zookeeper |
| [HBASE-24665](https://issues.apache.org/jira/browse/HBASE-24665) | MultiWAL :  Avoid rolling of ALL WALs when one of the WAL needs a roll |  Major | wal |
| [HBASE-23157](https://issues.apache.org/jira/browse/HBASE-23157) | WAL unflushed seqId tracking may wrong when Durability.ASYNC\_WAL is used |  Major | regionserver, wal |
| [HBASE-24625](https://issues.apache.org/jira/browse/HBASE-24625) | AsyncFSWAL.getLogFileSizeIfBeingWritten does not return the expected synced file length. |  Critical | Replication, wal |
| [HBASE-24788](https://issues.apache.org/jira/browse/HBASE-24788) | Fix the connection leaks on getting hbase admin from unclosed connection |  Major | mapreduce |
| [HBASE-24812](https://issues.apache.org/jira/browse/HBASE-24812) | Fix the precommit error for branch-2.2 |  Major | . |
| [HBASE-24713](https://issues.apache.org/jira/browse/HBASE-24713) | RS startup with FSHLog throws NPE after HBASE-21751 |  Minor | wal |
| [HBASE-24794](https://issues.apache.org/jira/browse/HBASE-24794) | hbase.rowlock.wait.duration should not be \<= 0 |  Minor | regionserver |
| [HBASE-24752](https://issues.apache.org/jira/browse/HBASE-24752) | NPE/500 accessing webui on master startup |  Minor | master |
| [HBASE-24775](https://issues.apache.org/jira/browse/HBASE-24775) | [hbtop] StoreFile size should be rounded off |  Minor | hbtop |
| [HBASE-24675](https://issues.apache.org/jira/browse/HBASE-24675) | On Master restart all servers are assigned to default rsgroup. |  Major | rsgroup |
| [HBASE-22146](https://issues.apache.org/jira/browse/HBASE-22146) | SpaceQuotaViolationPolicy Disable is not working in Namespace level |  Major | . |
| [HBASE-24742](https://issues.apache.org/jira/browse/HBASE-24742) | Improve performance of SKIP vs SEEK logic |  Major | Performance, regionserver |
| [HBASE-24721](https://issues.apache.org/jira/browse/HBASE-24721) | rename\_rsgroup overwriting the existing rsgroup. |  Major | . |
| [HBASE-24615](https://issues.apache.org/jira/browse/HBASE-24615) | MutableRangeHistogram#updateSnapshotRangeMetrics doesn't calculate the distribution for last bucket. |  Major | metrics |
| [HBASE-24720](https://issues.apache.org/jira/browse/HBASE-24720) | Meta replicas not cleaned when disabled |  Minor | read replicas |
| [HBASE-24693](https://issues.apache.org/jira/browse/HBASE-24693) | regioninfo#isLast() has a logic error |  Minor | . |
| [HBASE-24593](https://issues.apache.org/jira/browse/HBASE-24593) | [branch-2.2] Fix the maven compilation failure for nightly build |  Major | . |
| [HBASE-24546](https://issues.apache.org/jira/browse/HBASE-24546) | CloneSnapshotProcedure unlimited retry |  Major | snapshots |
| [HBASE-24657](https://issues.apache.org/jira/browse/HBASE-24657) | JsonBean representation of metrics at /jmx endpoint now quotes all numbers |  Minor | metrics |
| [HBASE-24117](https://issues.apache.org/jira/browse/HBASE-24117) | Shutdown AssignmentManager before ProcedureExecutor may cause SCP to accidentally skip assigning a region |  Critical | proc-v2 |
| [HBASE-24600](https://issues.apache.org/jira/browse/HBASE-24600) | Empty RegionAction added to MultiRequest in case of RowMutations/CheckAndMutate batch |  Major | . |
| [HBASE-24446](https://issues.apache.org/jira/browse/HBASE-24446) | Use EnvironmentEdgeManager to compute clock skew in Master |  Minor | . |
| [HBASE-24579](https://issues.apache.org/jira/browse/HBASE-24579) | Failed SASL authentication does not result in an exception on client side |  Major | rpc |
| [HBASE-24550](https://issues.apache.org/jira/browse/HBASE-24550) | Passing '-h' or '--help' to bin/hbase doesn't do as expected |  Trivial | Operability, shell |
| [HBASE-24516](https://issues.apache.org/jira/browse/HBASE-24516) | Parameter copyFiles should be passed in SecureBulkLoadClient |  Minor | Replication |
| [HBASE-24517](https://issues.apache.org/jira/browse/HBASE-24517) | AssignmentManager.start should add meta region to ServerStateNode |  Critical | amv2 |
| [HBASE-24189](https://issues.apache.org/jira/browse/HBASE-24189) | WALSplit recreates region dirs for deleted table with recovered edits data |  Major | regionserver, wal |
| [HBASE-23195](https://issues.apache.org/jira/browse/HBASE-23195) | FSDataInputStreamWrapper unbuffer can NOT invoke the classes that NOT implements CanUnbuffer but its parents class implements CanUnbuffer |  Critical | io |
| [HBASE-24529](https://issues.apache.org/jira/browse/HBASE-24529) | hbase.rs.evictblocksonclose is not honored when removing compacted files and closing the storefiles |  Major | . |
| [HBASE-24532](https://issues.apache.org/jira/browse/HBASE-24532) | Execute region plans with throttle should return succeeded plans |  Major | . |
| [HBASE-24511](https://issues.apache.org/jira/browse/HBASE-24511) | Ability to configure timeout between RPC retry to RS from master |  Major | . |
| [HBASE-24444](https://issues.apache.org/jira/browse/HBASE-24444) | Should shutdown mini cluster after class in TestMetaAssignmentWithStopMaster |  Minor | test |
| [HBASE-24515](https://issues.apache.org/jira/browse/HBASE-24515) | batch Increment/Append fails when retrying the RPC |  Major | . |
| [HBASE-24506](https://issues.apache.org/jira/browse/HBASE-24506) | async client deadlock |  Blocker | asyncclient |
| [HBASE-24513](https://issues.apache.org/jira/browse/HBASE-24513) | The default readRpcTimeout and writeRpcTimeout is incorrectly calculated in AsyncConnectionConfiguration |  Critical | asyncclient, Client |
| [HBASE-24499](https://issues.apache.org/jira/browse/HBASE-24499) | Use a client property for SaslConnection MAX\_ATTEMPTS (currently hardcoded to 5) |  Minor | Client, security |
| [HBASE-24280](https://issues.apache.org/jira/browse/HBASE-24280) | Hadoop2 and Hadoop3 profiles being activated simultaneously causing test failures |  Major | . |
| [HBASE-24454](https://issues.apache.org/jira/browse/HBASE-24454) | BucketCache disabled instantly before error duration toleration is reached due to timing issue |  Major | BucketCache |
| [HBASE-24379](https://issues.apache.org/jira/browse/HBASE-24379) | CatalogJanitor misreports region holes when there are actually over laps. |  Major | master |
| [HBASE-24426](https://issues.apache.org/jira/browse/HBASE-24426) | Missing regionName while logging warning in HBCKServerCrashProcedure |  Minor | . |
| [HBASE-24401](https://issues.apache.org/jira/browse/HBASE-24401) | Cell size limit check on append should consider 0 or less value to disable the check |  Major | . |


### TESTS:

| JIRA | Summary | Priority | Component |
|:---- |:---- | :--- |:---- |
| [HBASE-23814](https://issues.apache.org/jira/browse/HBASE-23814) | Add null checks and logging to misc set of tests |  Trivial | . |
| [HBASE-22548](https://issues.apache.org/jira/browse/HBASE-22548) | Split TestAdmin1 |  Major | Admin, test |
| [HBASE-22524](https://issues.apache.org/jira/browse/HBASE-22524) | Refactor TestReplicationSyncUpTool |  Major | test |
| [HBASE-21905](https://issues.apache.org/jira/browse/HBASE-21905) | TestFIFOCompactionPolicy is flaky |  Major | test |
| [HBASE-23974](https://issues.apache.org/jira/browse/HBASE-23974) | [Flakey Tests] Allow that server may not yet be cleared from DeadServers in TestHBCKSCP |  Major | . |
| [HBASE-24035](https://issues.apache.org/jira/browse/HBASE-24035) | [Flakey Tests] Disable TestClusterScopeQuotaThrottle#testUserNamespaceClusterScopeQuota |  Major | . |


### SUB-TASKS:

| JIRA | Summary | Priority | Component |
|:---- |:---- | :--- |:---- |
| [HBASE-24689](https://issues.apache.org/jira/browse/HBASE-24689) | Generate CHANGES.md and RELEASENOTES.md for 2.2.6 |  Major | . |
| [HBASE-24881](https://issues.apache.org/jira/browse/HBASE-24881) | Fix flaky TestMasterAbortAndRSGotKilled for branch-2.2 |  Major | . |
| [HBASE-24870](https://issues.apache.org/jira/browse/HBASE-24870) | Ignore TestAsyncTableRSCrashPublish |  Major | . |
| [HBASE-24946](https://issues.apache.org/jira/browse/HBASE-24946) | Remove the metrics assert in TestClusterRestartFailover |  Major | . |
| [HBASE-24948](https://issues.apache.org/jira/browse/HBASE-24948) | Reduce the resource of  TestReplicationBase |  Major | . |
| [HBASE-24052](https://issues.apache.org/jira/browse/HBASE-24052) | Add debug+fix to TestMasterShutdown |  Trivial | . |
| [HBASE-24906](https://issues.apache.org/jira/browse/HBASE-24906) | Enlarge the wait time in TestReplicationEndpoint/TestMetaWithReplicasBasic |  Major | . |
| [HBASE-24904](https://issues.apache.org/jira/browse/HBASE-24904) | Speed up some unit tests |  Major | . |
| [HBASE-24895](https://issues.apache.org/jira/browse/HBASE-24895) | Speed up TestFromClientSide3 by reduce the table regions number |  Major | . |
| [HBASE-24907](https://issues.apache.org/jira/browse/HBASE-24907) | Turn off the balancer when test region admin api |  Major | . |
| [HBASE-24847](https://issues.apache.org/jira/browse/HBASE-24847) | Backport HBASE-23956: Use less resources running tests to branch-2.2 |  Major | . |
| [HBASE-24878](https://issues.apache.org/jira/browse/HBASE-24878) | Backport part of HBASE-24079 and HBASE-24034 |  Major | . |
| [HBASE-24879](https://issues.apache.org/jira/browse/HBASE-24879) | Fix the shellcheck download url |  Major | . |
| [HBASE-24150](https://issues.apache.org/jira/browse/HBASE-24150) | Allow module tests run in parallel |  Major | build |
| [HBASE-24126](https://issues.apache.org/jira/browse/HBASE-24126) | Up the container nproc uplimit from 10000 to 12500 |  Major | build |
| [HBASE-24876](https://issues.apache.org/jira/browse/HBASE-24876) | Fix the flaky job url in hbase-personality.sh |  Major | . |
| [HBASE-23851](https://issues.apache.org/jira/browse/HBASE-23851) | Log networks and bind addresses when multicast publisher/listener enabled |  Trivial | . |
| [HBASE-24841](https://issues.apache.org/jira/browse/HBASE-24841) | Change the jenkins job urls in our jenkinsfile |  Major | build, scripts |
| [HBASE-24846](https://issues.apache.org/jira/browse/HBASE-24846) | Address compaction races in TestFIFOCompactionPolicy |  Major | Compaction, master |
| [HBASE-24819](https://issues.apache.org/jira/browse/HBASE-24819) | Fix flaky test TestRaceBetweenSCPAndDTP and TestRaceBetweenSCPAndTRSP for branch-2.2 |  Major | . |
| [HBASE-24756](https://issues.apache.org/jira/browse/HBASE-24756) | Backport HBASE-24336 to branch-2.2 |  Minor | metrics |
| [HBASE-24690](https://issues.apache.org/jira/browse/HBASE-24690) | Set version to 2.2.6 in branch-2.2 for first RC of 2.2.6 |  Major | . |
| [HBASE-24630](https://issues.apache.org/jira/browse/HBASE-24630) | Purge dev javadoc from client bin tarball |  Major | build |
| [HBASE-24598](https://issues.apache.org/jira/browse/HBASE-24598) | Port HBASE-24380 (Improve WAL splitting log lines to enable sessionization) to branch-2.2 |  Major | logging, Operability, wal |
| [HBASE-24347](https://issues.apache.org/jira/browse/HBASE-24347) | Hadoop2&Hadoop3 profiles are both active when pre-commit PR builds run |  Major | build |
| [HBASE-24432](https://issues.apache.org/jira/browse/HBASE-24432) | Set version as 2.2.6-SNAPSHOT in branch-2.2 |  Major | . |
| [HBASE-23771](https://issues.apache.org/jira/browse/HBASE-23771) | [Flakey Tests] Test TestSplitTransactionOnCluster Again |  Major | . |
| [HBASE-24022](https://issues.apache.org/jira/browse/HBASE-24022) | Set version as 2.2.5-SNAPSHOT in branch-2.2 |  Major | . |


### OTHER:

| JIRA | Summary | Priority | Component |
|:---- |:---- | :--- |:---- |
| [HBASE-14847](https://issues.apache.org/jira/browse/HBASE-14847) | Add FIFO compaction section to HBase book |  Major | documentation |
| [HBASE-23866](https://issues.apache.org/jira/browse/HBASE-23866) | More test classifications |  Trivial | test |
| [HBASE-24658](https://issues.apache.org/jira/browse/HBASE-24658) | Update PolicyBasedChaosMonkey to handle uncaught exceptions |  Minor | integration tests |
| [HBASE-24635](https://issues.apache.org/jira/browse/HBASE-24635) | Split TestMetaWithReplicas |  Major | test |
| [HBASE-24367](https://issues.apache.org/jira/browse/HBASE-24367) | ScheduledChore log elapsed timespan in a human-friendly format |  Minor | master, regionserver |
| [HBASE-24500](https://issues.apache.org/jira/browse/HBASE-24500) | The behavior of RegionInfoBuilder.newBuilder(RegionInfo) is strange |  Blocker | Client, read replicas |



## Release 2.2.5 - Unreleased (as of 2020-05-21)

### IMPROVEMENTS:

| JIRA | Summary | Priority | Component |
|:---- |:---- | :--- |:---- |
| [HBASE-24386](https://issues.apache.org/jira/browse/HBASE-24386) | TableSnapshotScanner support scan limit |  Major | Scanners, snapshots |
| [HBASE-24164](https://issues.apache.org/jira/browse/HBASE-24164) | Retain the ReadRequests and WriteRequests of region on web UI after alter table |  Major | metrics |
| [HBASE-24355](https://issues.apache.org/jira/browse/HBASE-24355) | Fix typos in the HStore#compact annotation |  Minor | . |
| [HBASE-24345](https://issues.apache.org/jira/browse/HBASE-24345) | [ACL] renameRSGroup should require Admin level permission |  Major | acl, rsgroup |
| [HBASE-24328](https://issues.apache.org/jira/browse/HBASE-24328) | skip duplicate GCMultipleMergedRegionsProcedure while previous finished |  Major | . |
| [HBASE-24221](https://issues.apache.org/jira/browse/HBASE-24221) | Support bulkLoadHFile by family |  Major | HFile |
| [HBASE-24302](https://issues.apache.org/jira/browse/HBASE-24302) | Add an "ignoreTimestamps" option (defaulted to false) to HashTable/SyncTable tool |  Major | . |
| [HBASE-24199](https://issues.apache.org/jira/browse/HBASE-24199) | Procedure related metrics is not consumed in the JMX metric |  Minor | metrics |
| [HBASE-24252](https://issues.apache.org/jira/browse/HBASE-24252) | Implement proxyuser/doAs mechanism for hbase-http |  Major | security, UI |
| [HBASE-23264](https://issues.apache.org/jira/browse/HBASE-23264) | Resolve a TODO of BucketAllocator: "Why we add the extra 1024 bytes? Slop?" |  Minor | BucketCache |
| [HBASE-24222](https://issues.apache.org/jira/browse/HBASE-24222) | remove FSUtils.checkAccess and replace with FileSystem.access in HBCK |  Major | Filesystem Integration |
| [HBASE-24196](https://issues.apache.org/jira/browse/HBASE-24196) | [Shell] Add rename rsgroup command in hbase shell |  Major | rsgroup, shell |
| [HBASE-24166](https://issues.apache.org/jira/browse/HBASE-24166) | Duplicate implementation for acquireLock between CreateTableProcedure and its parent class |  Minor | proc-v2 |
| [HBASE-24148](https://issues.apache.org/jira/browse/HBASE-24148) | Upgrade Thrift to 0.13.0: 0.12.0 has outstanding CVEs. |  Major | Thrift |
| [HBASE-24112](https://issues.apache.org/jira/browse/HBASE-24112) | [RSGroup] Support renaming rsgroup |  Major | rsgroup |
| [HBASE-24181](https://issues.apache.org/jira/browse/HBASE-24181) | Add region info when log meessages in HRegion. |  Minor | regionserver |
| [HBASE-24099](https://issues.apache.org/jira/browse/HBASE-24099) | Use a fair ReentrantReadWriteLock for the region close lock |  Major | . |
| [HBASE-24077](https://issues.apache.org/jira/browse/HBASE-24077) | When encounter RowTooBigException, log the row info. |  Minor | . |
| [HBASE-24111](https://issues.apache.org/jira/browse/HBASE-24111) | Enable CompactionTool executions on non-HDFS filesystems |  Major | Compaction, mapreduce, tooling |
| [HBASE-24102](https://issues.apache.org/jira/browse/HBASE-24102) | RegionMover should exclude draining/decommissioning nodes from target RSs |  Major | . |
| [HBASE-24021](https://issues.apache.org/jira/browse/HBASE-24021) | Fail fast when bulkLoadHFiles method catch some IOException |  Major | HFile, regionserver |
| [HBASE-8868](https://issues.apache.org/jira/browse/HBASE-8868) | add metric to report client shortcircuit reads |  Minor | metrics, regionserver |
| [HBASE-24032](https://issues.apache.org/jira/browse/HBASE-24032) | [RSGroup] Assign created tables to respective rsgroup automatically instead of manual operations |  Major | master, rsgroup |
| [HBASE-23967](https://issues.apache.org/jira/browse/HBASE-23967) | Improve the accuracy of the method sizeToString |  Minor | . |


### BUG FIXES:

| JIRA | Summary | Priority | Component |
|:---- |:---- | :--- |:---- |
| [HBASE-24364](https://issues.apache.org/jira/browse/HBASE-24364) | [Chaos Monkey] Invalid data block encoding in ChangeEncodingAction |  Major | . |
| [HBASE-24399](https://issues.apache.org/jira/browse/HBASE-24399) | [Flakey Tests] Some UTs about RSGroup should wait RSGroupInfoManager to be online |  Minor | rsgroup |
| [HBASE-20289](https://issues.apache.org/jira/browse/HBASE-20289) | Comparator for NormalizationPlan breaks comparator's convention |  Minor | master |
| [HBASE-24365](https://issues.apache.org/jira/browse/HBASE-24365) | MetricsTableWrapperAggregateImpl runnable fails due to exception and never runs |  Minor | metrics |
| [HBASE-24377](https://issues.apache.org/jira/browse/HBASE-24377) | MemStoreFlusher throw NullPointerException |  Major | . |
| [HBASE-24381](https://issues.apache.org/jira/browse/HBASE-24381) | The Size metrics in Master Webui is wrong if the size is 0 |  Major | UI |
| [HBASE-24135](https://issues.apache.org/jira/browse/HBASE-24135) | TableStateNotFoundException happends when table creation if rsgroup is enable |  Minor | . |
| [HBASE-24165](https://issues.apache.org/jira/browse/HBASE-24165) | maxPoolSize is logged incorrectly in ByteBufferPool |  Minor | . |
| [HBASE-23702](https://issues.apache.org/jira/browse/HBASE-23702) | \`hbase.hstore.flusher.count\` setting to 0 breaks HMaster |  Major | regionserver |
| [HBASE-23832](https://issues.apache.org/jira/browse/HBASE-23832) | Old config hbase.hstore.compactionThreshold is ignored |  Critical | . |
| [HBASE-24190](https://issues.apache.org/jira/browse/HBASE-24190) | Make kerberos value of hbase.security.authentication property case insensitive |  Major | . |
| [HBASE-24363](https://issues.apache.org/jira/browse/HBASE-24363) | Fix failed ut TestAssignmentManagerMetrics for branch-2.2 |  Major | . |
| [HBASE-24349](https://issues.apache.org/jira/browse/HBASE-24349) | Use rubocop 0.81.0 in Dockerfile |  Blocker | build |
| [HBASE-24273](https://issues.apache.org/jira/browse/HBASE-24273) | HBCK's "Orphan Regions on FileSystem" reports regions with referenced HFiles |  Critical | hbck2 |
| [HBASE-24322](https://issues.apache.org/jira/browse/HBASE-24322) | UnsafeAvailChecker should also check that required methods are available |  Minor | . |
| [HBASE-24314](https://issues.apache.org/jira/browse/HBASE-24314) | Some classes still use log4j logger directly |  Blocker | logging |
| [HBASE-24288](https://issues.apache.org/jira/browse/HBASE-24288) | Allow admin user to create table and do bulkLoad |  Major | acl |
| [HBASE-22710](https://issues.apache.org/jira/browse/HBASE-22710) | Wrong result in one case of scan that use  raw and versions and filter together |  Major | Scanners |
| [HBASE-24282](https://issues.apache.org/jira/browse/HBASE-24282) | 'scandetail' log message is missing when responseTooSlow happens on the first scan rpc call |  Major | Operability |
| [HBASE-24274](https://issues.apache.org/jira/browse/HBASE-24274) | \`RESTApiClusterManager\` attempts to deserialize response using serialization API |  Major | integration tests |
| [HBASE-24281](https://issues.apache.org/jira/browse/HBASE-24281) | Remove some stale hadoop.version properties in the pom for sub modules |  Major | hadoop3, pom |
| [HBASE-24213](https://issues.apache.org/jira/browse/HBASE-24213) | Backport the pre commit changes for HBASE-24169 to all branches |  Major | scripts |
| [HBASE-24174](https://issues.apache.org/jira/browse/HBASE-24174) | Fix findbugs warning on ServiceAuthorizationManager |  Major | . |
| [HBASE-24177](https://issues.apache.org/jira/browse/HBASE-24177) | MetricsTable#updateFlushTime is wrong |  Minor | metrics |
| [HBASE-23833](https://issues.apache.org/jira/browse/HBASE-23833) | The relocated hadoop-thirdparty protobuf breaks HBase asyncwal |  Major | wal |
| [HBASE-24158](https://issues.apache.org/jira/browse/HBASE-24158) | [Flakey Tests] TestAsyncTableGetMultiThreaded |  Major | . |
| [HBASE-24186](https://issues.apache.org/jira/browse/HBASE-24186) | RegionMover ignores replicationId |  Minor | read replicas |
| [HBASE-24151](https://issues.apache.org/jira/browse/HBASE-24151) | [rsgroup] The master server  aborted for IllegalThreadStateException |  Minor | rsgroup |
| [HBASE-24197](https://issues.apache.org/jira/browse/HBASE-24197) | TestHttpServer.testBindAddress failure with latest jetty |  Major | . |
| [HBASE-24176](https://issues.apache.org/jira/browse/HBASE-24176) | user\_permission '.\*'  command failed to show all table permissions |  Minor | shell |
| [HBASE-24167](https://issues.apache.org/jira/browse/HBASE-24167) | [Flakey Tests] TestHRegionWithInMemoryFlush#testWritesWhileScanning gets stuck MVCC |  Major | . |
| [HBASE-23998](https://issues.apache.org/jira/browse/HBASE-23998) | Update license for jetty-client |  Major | build, dependencies |
| [HBASE-24074](https://issues.apache.org/jira/browse/HBASE-24074) | ConcurrentModificationException occurred in ReplicationSourceManager while refreshing the peer |  Major | Replication |
| [HBASE-24121](https://issues.apache.org/jira/browse/HBASE-24121) | [Authorization] ServiceAuthorizationManager isn't dynamically updatable. And it should be. |  Major | rpc, security |
| [HBASE-24122](https://issues.apache.org/jira/browse/HBASE-24122) | Change machine ulimit-l to ulimit-a so dumps full ulimit rather than just 'max locked memory' |  Major | build |
| [HBASE-24041](https://issues.apache.org/jira/browse/HBASE-24041) | [regression]  Increase RESTServer buffer size back to 64k |  Major | REST |
| [HBASE-24057](https://issues.apache.org/jira/browse/HBASE-24057) | Add modules to mapreduce job classpaths |  Major | mapreduce |
| [HBASE-24040](https://issues.apache.org/jira/browse/HBASE-24040) | WALFactory.Providers.multiwal causes StackOverflowError |  Minor | wal |
| [HBASE-23949](https://issues.apache.org/jira/browse/HBASE-23949) | refactor  loadBalancer implements for rsgroup balance by table to  achieve overallbalanced |  Major | rsgroup |
| [HBASE-24043](https://issues.apache.org/jira/browse/HBASE-24043) | [Flakey Tests] TestAsyncRegionAdminApi, TestRegionMergeTransactionOnCluster fixes and debug |  Major | flakies |
| [HBASE-24019](https://issues.apache.org/jira/browse/HBASE-24019) | Correct exception messages for table null and namespace unavailable. |  Minor | . |
| [HBASE-24016](https://issues.apache.org/jira/browse/HBASE-24016) | Change nightly poll from cron @daily to pollSCM @daily; i.e. run nightly if a change ONLY |  Major | . |
| [HBASE-22103](https://issues.apache.org/jira/browse/HBASE-22103) | HDFS-13209 in Hadoop 3.3.0 breaks asyncwal |  Major | hadoop3, wal |


### TESTS:

| JIRA | Summary | Priority | Component |
|:---- |:---- | :--- |:---- |
| [HBASE-23957](https://issues.apache.org/jira/browse/HBASE-23957) | [flakey test] client.TestMultiParallel fails to read hbase-site.xml |  Minor | test |
| [HBASE-24080](https://issues.apache.org/jira/browse/HBASE-24080) | [flakey test] TestRegionReplicaFailover.testSecondaryRegionKill fails. |  Major | read replicas |
| [HBASE-23943](https://issues.apache.org/jira/browse/HBASE-23943) | Rubocop configuration needs updated |  Minor | build |
| [HBASE-24115](https://issues.apache.org/jira/browse/HBASE-24115) | Relocate test-only REST "client" from src/ to test/ and mark Private |  Major | REST, security |
| [HBASE-23999](https://issues.apache.org/jira/browse/HBASE-23999) | [flakey test] TestTableOutputFormatConnectionExhaust |  Major | test |


### SUB-TASKS:

| JIRA | Summary | Priority | Component |
|:---- |:---- | :--- |:---- |
| [HBASE-24218](https://issues.apache.org/jira/browse/HBASE-24218) | Add hadoop 3.2.x in hadoop check |  Major | scripts |
| [HBASE-24175](https://issues.apache.org/jira/browse/HBASE-24175) | [Flakey Tests] TestSecureExportSnapshot FileNotFoundException |  Major | flakies |
| [HBASE-23992](https://issues.apache.org/jira/browse/HBASE-23992) | Fix TestAdminShell and TestQuotasShell mistakenly broken by parent commit |  Trivial | test |
| [HBASE-24050](https://issues.apache.org/jira/browse/HBASE-24050) | Deprecated PBType on all 2.x branches |  Major | Protobufs |
| [HBASE-24022](https://issues.apache.org/jira/browse/HBASE-24022) | Set version as 2.2.5-SNAPSHOT in branch-2.2 |  Major | . |
| [HBASE-24009](https://issues.apache.org/jira/browse/HBASE-24009) | Backport the personality changes in HBASE-23989 to all active branches |  Major | build |
| [HBASE-23891](https://issues.apache.org/jira/browse/HBASE-23891) | Add an option to Actions to filter out meta RS |  Minor | integration tests |


### OTHER:

| JIRA | Summary | Priority | Component |
|:---- |:---- | :--- |:---- |
| [HBASE-24271](https://issues.apache.org/jira/browse/HBASE-24271) | Set values in \`conf/hbase-site.xml\` that enable running on \`LocalFileSystem\` out of the box |  Major | . |
| [HBASE-24258](https://issues.apache.org/jira/browse/HBASE-24258) | [Hadoop3.3] Update license for org.ow2.asm:\* |  Minor | dependencies |
| [HBASE-24301](https://issues.apache.org/jira/browse/HBASE-24301) | Update Apache POM to version 23 |  Minor | . |
| [HBASE-23896](https://issues.apache.org/jira/browse/HBASE-23896) | Snapshot owner cannot delete snapshot when ACL is enabled and Kerberos is not enabled |  Major | . |
| [HBASE-24138](https://issues.apache.org/jira/browse/HBASE-24138) | Ensure StochasticLoadBalancer can log details of decision to not run balancer |  Major | Balancer, Operability |
| [HBASE-23047](https://issues.apache.org/jira/browse/HBASE-23047) | ChecksumUtil.validateChecksum logs an INFO message inside a "if(LOG.isTraceEnabled())" block. |  Minor | . |



## Release 2.2.4 - Unreleased (as of 2020-03-11)

### NEW FEATURES:

| JIRA | Summary | Priority | Component |
|:---- |:---- | :--- |:---- |
| [HBASE-23710](https://issues.apache.org/jira/browse/HBASE-23710) | Priority configuration for system coprocessors |  Major | Coprocessors |


### IMPROVEMENTS:

| JIRA | Summary | Priority | Component |
|:---- |:---- | :--- |:---- |
| [HBASE-22827](https://issues.apache.org/jira/browse/HBASE-22827) | Expose multi-region merge in shell and Admin API |  Major | Admin, shell |
| [HBASE-23864](https://issues.apache.org/jira/browse/HBASE-23864) | No need to submit SplitTableRegionProcedure/MergeTableRegionsProcedure when split/merge is disabled |  Major | . |
| [HBASE-23859](https://issues.apache.org/jira/browse/HBASE-23859) | Modify "Block locality" of RegionServer Web UI to human readable percentage |  Trivial | . |
| [HBASE-23802](https://issues.apache.org/jira/browse/HBASE-23802) | Remove unnecessary Configuration instantiation in LossyAccounting |  Minor | metrics |
| [HBASE-23822](https://issues.apache.org/jira/browse/HBASE-23822) | Fix typo in procedures.jsp |  Trivial | website |
| [HBASE-23686](https://issues.apache.org/jira/browse/HBASE-23686) | Revert binary incompatible change and remove reflection |  Major | . |
| [HBASE-23683](https://issues.apache.org/jira/browse/HBASE-23683) | Make HBaseInterClusterReplicationEndpoint more extensible |  Major | Replication |
| [HBASE-23646](https://issues.apache.org/jira/browse/HBASE-23646) | Fix remaining Checkstyle violations in tests of hbase-rest |  Minor | . |
| [HBASE-23674](https://issues.apache.org/jira/browse/HBASE-23674) | Too many rit page Numbers show confusion |  Trivial | master |
| [HBASE-23383](https://issues.apache.org/jira/browse/HBASE-23383) | [hbck2] \`fixHoles\` should queue assignment procedures for any regions its fixing |  Minor | hbck2, master, Region Assignment |
| [HBASE-23165](https://issues.apache.org/jira/browse/HBASE-23165) | [hbtop] Some modifications from HBASE-22988 |  Minor | . |


### BUG FIXES:

| JIRA | Summary | Priority | Component |
|:---- |:---- | :--- |:---- |
| [HBASE-23953](https://issues.apache.org/jira/browse/HBASE-23953) | SimpleBalancer bug when second pass to fill up to min |  Major | Balancer |
| [HBASE-23954](https://issues.apache.org/jira/browse/HBASE-23954) | SplitParent region should not be balanced |  Major | Balancer |
| [HBASE-23944](https://issues.apache.org/jira/browse/HBASE-23944) | The method setClusterLoad of SimpleLoadBalancer is incorrect when balance by table |  Major | Balancer |
| [HBASE-23909](https://issues.apache.org/jira/browse/HBASE-23909) | list\_regions fails if table is under split |  Minor | shell |
| [HBASE-23892](https://issues.apache.org/jira/browse/HBASE-23892) | SecureTestCluster should allow its subclasses to pass their Class reference on HBaseKerberosUtils.setSSLConfiguration |  Major | . |
| [HBASE-23809](https://issues.apache.org/jira/browse/HBASE-23809) | The RSGroup shell test is missing |  Major | rsgroup, test |
| [HBASE-17115](https://issues.apache.org/jira/browse/HBASE-17115) | HMaster/HRegion Info Server does not honour admin.acl |  Major | . |
| [HBASE-23737](https://issues.apache.org/jira/browse/HBASE-23737) | [Flakey Tests] TestFavoredNodeTableImport fails 30% of the time |  Major | . |
| [HBASE-23733](https://issues.apache.org/jira/browse/HBASE-23733) | [Flakey Tests] TestSplitTransactionOnCluster |  Major | flakies |
| [HBASE-23701](https://issues.apache.org/jira/browse/HBASE-23701) | Make sure HBaseClassTestRule doesn't suffer same issue as HBaseClassTestRuleChecker |  Minor | . |
| [HBASE-23695](https://issues.apache.org/jira/browse/HBASE-23695) | Fail more gracefully when test class is missing Category |  Minor | . |
| [HBASE-23677](https://issues.apache.org/jira/browse/HBASE-23677) | region.jsp returns 500/NPE when provided encoded region name is not online |  Minor | regionserver, UI |
| [HBASE-23679](https://issues.apache.org/jira/browse/HBASE-23679) | FileSystem instance leaks due to bulk loads with Kerberos enabled |  Critical | . |
| [HBASE-21345](https://issues.apache.org/jira/browse/HBASE-21345) | [hbck2] Allow version check to proceed even though master is 'initializing'. |  Major | hbck2 |


### TESTS:

| JIRA | Summary | Priority | Component |
|:---- |:---- | :--- |:---- |
| [HBASE-23808](https://issues.apache.org/jira/browse/HBASE-23808) | [Flakey Test] TestMasterShutdown#testMasterShutdownBeforeStartingAnyRegionServer |  Major | test |
| [HBASE-23793](https://issues.apache.org/jira/browse/HBASE-23793) | Increase maven heap allocation to 4G in Yetus personality |  Major | build, test |
| [HBASE-23792](https://issues.apache.org/jira/browse/HBASE-23792) | [Flakey Test] TestExportSnapshotNoCluster.testSnapshotWithRefsExportFileSystemState |  Major | test |
| [HBASE-23749](https://issues.apache.org/jira/browse/HBASE-23749) | TestHFileWriterV3 should have tests for all data block encodings |  Major | . |
| [HBASE-23711](https://issues.apache.org/jira/browse/HBASE-23711) | Add test for MinVersions and KeepDeletedCells TTL |  Minor | . |
| [HBASE-23569](https://issues.apache.org/jira/browse/HBASE-23569) | Validate that the log cleaner actually cleans oldWALs as expected |  Major | integration tests, master, test |


### SUB-TASKS:

| JIRA | Summary | Priority | Component |
|:---- |:---- | :--- |:---- |
| [HBASE-23755](https://issues.apache.org/jira/browse/HBASE-23755) | [OpenTracing] Declare HTrace is unusable in the user doc |  Major | . |
| [HBASE-23748](https://issues.apache.org/jira/browse/HBASE-23748) | Include HBASE-21284 to branch-2.2 |  Major | . |
| [HBASE-23773](https://issues.apache.org/jira/browse/HBASE-23773) | Backport "HBASE-23601 OutputSink.WriterThread exception gets stuck and repeated indefinietly" to branch-2.2 |  Major | . |
| [HBASE-23728](https://issues.apache.org/jira/browse/HBASE-23728) | Include HBASE-21018 in 2.2 & 2.3 |  Major | . |
| [HBASE-23727](https://issues.apache.org/jira/browse/HBASE-23727) | Port HBASE-20981 in 2.2 & 2.3 |  Major | . |
| [HBASE-23692](https://issues.apache.org/jira/browse/HBASE-23692) | Set version as 2.2.4-SNAPSHOT in branch-2.2 |  Major | . |


### OTHER:

| JIRA | Summary | Priority | Component |
|:---- |:---- | :--- |:---- |
| [HBASE-23874](https://issues.apache.org/jira/browse/HBASE-23874) | Move Jira-attached file precommit definition from script in Jenkins config to dev-support |  Minor | build |
| [HBASE-23854](https://issues.apache.org/jira/browse/HBASE-23854) | Documentation update of external\_apis.adoc#example-scala-code |  Trivial | documentation |
| [HBASE-23774](https://issues.apache.org/jira/browse/HBASE-23774) | Announce user-zh list |  Trivial | website |
| [HBASE-23734](https://issues.apache.org/jira/browse/HBASE-23734) | Backport [HBASE-21874 Bucket cache on Persistent memory] to branch-2.2 |  Major | . |



## Release 2.2.3 - Unreleased (as of 2020-01-10)

### NEW FEATURES:

| JIRA | Summary | Priority | Component |
|:---- |:---- | :--- |:---- |
| [HBASE-22280](https://issues.apache.org/jira/browse/HBASE-22280) | Separate read/write handler for priority request(especially for meta). |  Major | Scheduler |
| [HBASE-22969](https://issues.apache.org/jira/browse/HBASE-22969) | A new binary component comparator(BinaryComponentComparator) to perform comparison of arbitrary length and position |  Minor | Filters |


### IMPROVEMENTS:

| JIRA | Summary | Priority | Component |
|:---- |:---- | :--- |:---- |
| [HBASE-23654](https://issues.apache.org/jira/browse/HBASE-23654) | Please add Apache Trafodion and EsgynDB to "Powered by Apache HBase" page |  Major | documentation |
| [HBASE-23651](https://issues.apache.org/jira/browse/HBASE-23651) | Region balance throttling can be disabled |  Major | . |
| [HBASE-23645](https://issues.apache.org/jira/browse/HBASE-23645) | Fix remaining Checkstyle violations in tests of hbase-common |  Minor | . |
| [HBASE-23635](https://issues.apache.org/jira/browse/HBASE-23635) | Reduce number of Checkstyle violations in hbase-mapreduce |  Minor | mapreduce |
| [HBASE-23333](https://issues.apache.org/jira/browse/HBASE-23333) | Include simple Call.toShortString() in sendCall exceptions |  Minor | Client, Operability |
| [HBASE-23629](https://issues.apache.org/jira/browse/HBASE-23629) | Addition to Supporting projects page |  Minor | . |
| [HBASE-23623](https://issues.apache.org/jira/browse/HBASE-23623) | Reduce number of Checkstyle violations in hbase-rest |  Minor | REST |
| [HBASE-23627](https://issues.apache.org/jira/browse/HBASE-23627) | Resolve remaining Checkstyle violations in hbase-thrift |  Minor | Thrift |
| [HBASE-23615](https://issues.apache.org/jira/browse/HBASE-23615) | Use a dedicated thread for executing WorkerMonitor in ProcedureExecutor. |  Major | amv2 |
| [HBASE-23626](https://issues.apache.org/jira/browse/HBASE-23626) | Reduce number of Checkstyle violations in tests of hbase-common |  Minor | . |
| [HBASE-23622](https://issues.apache.org/jira/browse/HBASE-23622) | Reduce number of Checkstyle violations in hbase-common |  Minor | . |
| [HBASE-23621](https://issues.apache.org/jira/browse/HBASE-23621) | Reduce number of Checkstyle violations in tests of hbase-common |  Minor | . |
| [HBASE-23619](https://issues.apache.org/jira/browse/HBASE-23619) | Use built-in formatting for logging in hbase-zookeeper |  Trivial | Zookeeper |
| [HBASE-23238](https://issues.apache.org/jira/browse/HBASE-23238) | Additional test and checks for null references on ScannerCallableWithReplicas |  Minor | . |
| [HBASE-23613](https://issues.apache.org/jira/browse/HBASE-23613) | ProcedureExecutor check StuckWorkers blocked by DeadServerMetricRegionChore |  Major | . |
| [HBASE-23239](https://issues.apache.org/jira/browse/HBASE-23239) | Reporting on status of backing MOB files from client-facing cells |  Major | mapreduce, mob, Operability |
| [HBASE-23549](https://issues.apache.org/jira/browse/HBASE-23549) | Document steps to disable MOB for a column family |  Minor | documentation, mob |
| [HBASE-23380](https://issues.apache.org/jira/browse/HBASE-23380) | General Cleanup of FSUtil |  Minor | Filesystem Integration |
| [HBASE-23379](https://issues.apache.org/jira/browse/HBASE-23379) | Clean Up FSUtil getRegionLocalityMappingFromFS |  Minor | . |
| [HBASE-23377](https://issues.apache.org/jira/browse/HBASE-23377) | Balancer should skip disabled tables's regions |  Major | Balancer |
| [HBASE-23373](https://issues.apache.org/jira/browse/HBASE-23373) | Log \`RetriesExhaustedException\` context with full time precision |  Minor | asyncclient, Client |
| [HBASE-23303](https://issues.apache.org/jira/browse/HBASE-23303) | Add security headers to REST server/info page |  Major | REST |
| [HBASE-23361](https://issues.apache.org/jira/browse/HBASE-23361) | [UI] Limit two decimals even for total average load |  Minor | UI |
| [HBASE-23365](https://issues.apache.org/jira/browse/HBASE-23365) | Minor change MemStoreFlusher's log |  Trivial | . |
| [HBASE-23362](https://issues.apache.org/jira/browse/HBASE-23362) | WalPrettyPrinter should include the table name |  Minor | tooling |
| [HBASE-23352](https://issues.apache.org/jira/browse/HBASE-23352) | Allow chaos monkeys to access cmd line params, and improve FillDiskCommandAction |  Minor | integration tests |
| [HBASE-23293](https://issues.apache.org/jira/browse/HBASE-23293) | [REPLICATION] make ship edits timeout configurable |  Minor | Replication |
| [HBASE-23334](https://issues.apache.org/jira/browse/HBASE-23334) | The table-lock node of zk is not needed since HBASE-16786 |  Minor | . |
| [HBASE-23325](https://issues.apache.org/jira/browse/HBASE-23325) | [UI]rsgoup average load keep two decimals |  Minor | . |
| [HBASE-23321](https://issues.apache.org/jira/browse/HBASE-23321) | [hbck2] fixHoles of fixMeta doesn't update in-memory state |  Minor | hbck2 |
| [HBASE-23315](https://issues.apache.org/jira/browse/HBASE-23315) | Miscellaneous HBCK Report page cleanup |  Minor | . |
| [HBASE-23278](https://issues.apache.org/jira/browse/HBASE-23278) |  Add a table-level compaction progress display on the UI |  Minor | UI |
| [HBASE-19450](https://issues.apache.org/jira/browse/HBASE-19450) | Add log about average execution time for ScheduledChore |  Minor | Operability |
| [HBASE-23283](https://issues.apache.org/jira/browse/HBASE-23283) | Provide clear and consistent logging about the period of enabled chores |  Minor | Operability |
| [HBASE-23245](https://issues.apache.org/jira/browse/HBASE-23245) | All MutableHistogram implementations should remove maxExpected |  Major | metrics |
| [HBASE-23228](https://issues.apache.org/jira/browse/HBASE-23228) | Allow for jdk8 specific modules on branch-1 in precommit/nightly testing |  Critical | build, test |
| [HBASE-23082](https://issues.apache.org/jira/browse/HBASE-23082) | Backport low-latency snapshot tracking for space quotas to 2.x |  Major | Quotas |
| [HBASE-23221](https://issues.apache.org/jira/browse/HBASE-23221) | Polish the WAL interface after HBASE-23181 |  Major | regionserver, wal |
| [HBASE-23191](https://issues.apache.org/jira/browse/HBASE-23191) | Log spams on Replication |  Trivial | Replication |
| [HBASE-23207](https://issues.apache.org/jira/browse/HBASE-23207) | Log a region open journal |  Minor | . |
| [HBASE-23172](https://issues.apache.org/jira/browse/HBASE-23172) | HBase Canary region success count metrics reflect column family successes, not region successes |  Minor | canary |
| [HBASE-23170](https://issues.apache.org/jira/browse/HBASE-23170) | Admin#getRegionServers use ClusterMetrics.Option.SERVERS\_NAME |  Major | . |
| [HBASE-23038](https://issues.apache.org/jira/browse/HBASE-23038) | Provide consistent and clear logging about disabling chores |  Minor | master, regionserver |


### BUG FIXES:

| JIRA | Summary | Priority | Component |
|:---- |:---- | :--- |:---- |
| [HBASE-23658](https://issues.apache.org/jira/browse/HBASE-23658) | Fix flaky TestSnapshotFromMaster |  Major | . |
| [HBASE-23659](https://issues.apache.org/jira/browse/HBASE-23659) | BaseLoadBalancer#wouldLowerAvailability should consider region replicas |  Major | . |
| [HBASE-23655](https://issues.apache.org/jira/browse/HBASE-23655) | Fix flaky TestRSGroupsKillRS: should wait the SCP to finish |  Major | . |
| [HBASE-23663](https://issues.apache.org/jira/browse/HBASE-23663) | Allow dot and hyphen in Profiler's URL |  Minor | profiler |
| [HBASE-23666](https://issues.apache.org/jira/browse/HBASE-23666) | Backport "HBASE-23660 hbase:meta's table.jsp ref to wrong rs address" to branch-2 |  Major | master |
| [HBASE-23636](https://issues.apache.org/jira/browse/HBASE-23636) | Disable table may hang when regionserver stop or abort. |  Major | amv2 |
| [HBASE-23175](https://issues.apache.org/jira/browse/HBASE-23175) | Yarn unable to acquire delegation token for HBase Spark jobs |  Major | security, spark |
| [HBASE-23553](https://issues.apache.org/jira/browse/HBASE-23553) | Snapshot referenced data files are deleted in some case |  Major | . |
| [HBASE-23587](https://issues.apache.org/jira/browse/HBASE-23587) | The FSYNC\_WAL flag does not work on branch-2.x |  Major | wal |
| [HBASE-23596](https://issues.apache.org/jira/browse/HBASE-23596) | HBCKServerCrashProcedure can double assign |  Major | proc-v2 |
| [HBASE-23589](https://issues.apache.org/jira/browse/HBASE-23589) | FlushDescriptor contains non-matching family/output combinations |  Critical | read replicas |
| [HBASE-23581](https://issues.apache.org/jira/browse/HBASE-23581) | Creating table gets stuck when specifying an invalid split policy as METADATA |  Major | . |
| [HBASE-23572](https://issues.apache.org/jira/browse/HBASE-23572) | In 'HBCK Report', distinguish between live, dead, and unknown servers |  Trivial | . |
| [HBASE-23564](https://issues.apache.org/jira/browse/HBASE-23564) | RegionStates may has some expired serverinfo and make regions do not balance. |  Major | . |
| [HBASE-23594](https://issues.apache.org/jira/browse/HBASE-23594) | Procedure stuck due to region happen to recorded on two servers. |  Critical | amv2, Region Assignment |
| [HBASE-23376](https://issues.apache.org/jira/browse/HBASE-23376) | NPE happens while replica region is moving |  Minor | read replicas |
| [HBASE-23582](https://issues.apache.org/jira/browse/HBASE-23582) | Unbalanced braces in string representation of table descriptor |  Minor | . |
| [HBASE-23566](https://issues.apache.org/jira/browse/HBASE-23566) | Fix package/packet terminology problem in chaos monkeys |  Minor | integration tests |
| [HBASE-23360](https://issues.apache.org/jira/browse/HBASE-23360) | [CLI] Fix help command "set\_quota" to explain removing quota |  Minor | shell |
| [HBASE-23554](https://issues.apache.org/jira/browse/HBASE-23554) | Encoded regionname to regionname utility |  Major | shell |
| [HBASE-22096](https://issues.apache.org/jira/browse/HBASE-22096) | /storeFile.jsp shows CorruptHFileException when the storeFile is a reference file |  Major | UI |
| [HBASE-22529](https://issues.apache.org/jira/browse/HBASE-22529) | Sanity check for in-memory compaction policy |  Minor | . |
| [HBASE-23337](https://issues.apache.org/jira/browse/HBASE-23337) | Several modules missing in nexus for Apache HBase 2.2.2 |  Blocker | build, community, scripts |
| [HBASE-23345](https://issues.apache.org/jira/browse/HBASE-23345) | Table need to replication unless all of cfs are excluded |  Minor | Replication |
| [HBASE-23356](https://issues.apache.org/jira/browse/HBASE-23356) | When construct StoreScanner throw exceptions it is possible to left some KeyValueScanner not closed. |  Major | . |
| [HBASE-23117](https://issues.apache.org/jira/browse/HBASE-23117) | Bad enum in hbase:meta info:state column can fail loadMeta and stop startup |  Minor | . |
| [HBASE-23312](https://issues.apache.org/jira/browse/HBASE-23312) | HBase Thrift SPNEGO configs (HBASE-19852) should be backwards compatible |  Major | Thrift |
| [HBASE-23197](https://issues.apache.org/jira/browse/HBASE-23197) | "IllegalArgumentException: Wrong FS" on edits replay when WALs on different file system and hbase.region.archive.recovered.edits is enabled. |  Major | . |
| [HBASE-23336](https://issues.apache.org/jira/browse/HBASE-23336) | [CLI] Incorrect row(s) count  "clear\_deadservers" |  Minor | shell |
| [HBASE-23237](https://issues.apache.org/jira/browse/HBASE-23237) | Negative 'Requests per Second' counts in UI |  Major | UI |
| [HBASE-23328](https://issues.apache.org/jira/browse/HBASE-23328) | info:regioninfo goes wrong when region replicas enabled |  Major | read replicas |
| [HBASE-22607](https://issues.apache.org/jira/browse/HBASE-22607) | TestExportSnapshotNoCluster::testSnapshotWithRefsExportFileSystemState() fails intermittently |  Major | test |
| [HBASE-23318](https://issues.apache.org/jira/browse/HBASE-23318) | LoadTestTool doesn't start |  Minor | . |
| [HBASE-23282](https://issues.apache.org/jira/browse/HBASE-23282) | HBCKServerCrashProcedure for 'Unknown Servers' |  Major | hbck2, proc-v2 |
| [HBASE-23294](https://issues.apache.org/jira/browse/HBASE-23294) | ReplicationBarrierCleaner should delete all the barriers for a removed region which does not belong to any serial replication peer |  Major | master, Replication |
| [HBASE-23290](https://issues.apache.org/jira/browse/HBASE-23290) | shell processlist command is broken |  Major | shell |
| [HBASE-18439](https://issues.apache.org/jira/browse/HBASE-18439) | Subclasses of o.a.h.h.chaos.actions.Action all use the same logger |  Minor | integration tests |
| [HBASE-23262](https://issues.apache.org/jira/browse/HBASE-23262) | Cannot load Master UI |  Major | master, UI |
| [HBASE-23263](https://issues.apache.org/jira/browse/HBASE-23263) | NPE in Quotas.jsp |  Major | UI |
| [HBASE-22980](https://issues.apache.org/jira/browse/HBASE-22980) | HRegionPartioner getPartition() method incorrectly partitions the regions of the table. |  Major | mapreduce |
| [HBASE-21458](https://issues.apache.org/jira/browse/HBASE-21458) | Error: Could not find or load main class org.apache.hadoop.hbase.util.GetJavaProperty |  Minor | build, Client |
| [HBASE-23243](https://issues.apache.org/jira/browse/HBASE-23243) | [pv2] Filter out SUCCESS procedures; on decent-sized cluster, plethora overwhelms problems |  Major | proc-v2, UI |
| [HBASE-23247](https://issues.apache.org/jira/browse/HBASE-23247) | [hbck2] Schedule SCPs for 'Unknown Servers' |  Major | hbck2 |
| [HBASE-23241](https://issues.apache.org/jira/browse/HBASE-23241) | TestExecutorService sometimes fail |  Major | test |
| [HBASE-23244](https://issues.apache.org/jira/browse/HBASE-23244) | NPEs running Canary |  Major | canary |
| [HBASE-23231](https://issues.apache.org/jira/browse/HBASE-23231) | ReplicationSource do not update metrics after refresh |  Major | wal |
| [HBASE-22739](https://issues.apache.org/jira/browse/HBASE-22739) | ArrayIndexOutOfBoundsException when balance |  Major | Balancer |
| [HBASE-23192](https://issues.apache.org/jira/browse/HBASE-23192) | CatalogJanitor consistencyCheck does not log problematic row on exception |  Minor | hbck2 |
| [HBASE-20827](https://issues.apache.org/jira/browse/HBASE-20827) | Add pause when retrying after CallQueueTooBigException for reportRegionStateTransition |  Major | Region Assignment |
| [HBASE-23187](https://issues.apache.org/jira/browse/HBASE-23187) | Update parent region state to SPLIT in meta |  Major | master |
| [HBASE-23199](https://issues.apache.org/jira/browse/HBASE-23199) | Error populating Table-Attribute fields |  Major | master, UI |
| [HBASE-23222](https://issues.apache.org/jira/browse/HBASE-23222) | Better logging and mitigation for MOB compaction failures |  Critical | mob |
| [HBASE-23181](https://issues.apache.org/jira/browse/HBASE-23181) | Blocked WAL archive: "LogRoller: Failed to schedule flush of XXXX, because it is not online on us" |  Major | regionserver, wal |
| [HBASE-23193](https://issues.apache.org/jira/browse/HBASE-23193) | ConnectionImplementation.isTableAvailable can not deal with meta table on branch-2.x |  Major | rsgroup, test |
| [HBASE-23177](https://issues.apache.org/jira/browse/HBASE-23177) | If fail to open reference because FNFE, make it plain it is a Reference |  Major | Operability |
| [HBASE-23042](https://issues.apache.org/jira/browse/HBASE-23042) | Parameters are incorrect in procedures jsp |  Major | . |


### SUB-TASKS:

| JIRA | Summary | Priority | Component |
|:---- |:---- | :--- |:---- |
| [HBASE-23320](https://issues.apache.org/jira/browse/HBASE-23320) | Upgrade surefire plugin to 3.0.0-M4 |  Major | dependencies, test |
| [HBASE-20461](https://issues.apache.org/jira/browse/HBASE-20461) | Implement fsync for AsyncFSWAL |  Major | wal |
| [HBASE-23085](https://issues.apache.org/jira/browse/HBASE-23085) | Network and Data related Actions |  Minor | integration tests |
| [HBASE-23307](https://issues.apache.org/jira/browse/HBASE-23307) | Add running of ReplicationBarrierCleaner to hbck2 fixMeta invocation |  Major | hbck2 |
| [HBASE-23322](https://issues.apache.org/jira/browse/HBASE-23322) | [hbck2] Simplification on HBCKSCP scheduling |  Minor | hbck2 |
| [HBASE-22480](https://issues.apache.org/jira/browse/HBASE-22480) | Get block from BlockCache once and return this block to BlockCache twice make ref count error. |  Major | . |
| [HBASE-23136](https://issues.apache.org/jira/browse/HBASE-23136) | PartionedMobFileCompactor bulkloaded files shouldn't get replicated (addressing buklload replication related issue raised in HBASE-22380) |  Critical | . |
| [HBASE-23217](https://issues.apache.org/jira/browse/HBASE-23217) | Set version as 2.2.3-SNAPSHOT in branch-2.2 |  Major | . |
| [HBASE-22982](https://issues.apache.org/jira/browse/HBASE-22982) | Send SIGSTOP to hang or SIGCONT to resume rs and add graceful rolling restart |  Minor | integration tests |


### OTHER:

| JIRA | Summary | Priority | Component |
|:---- |:---- | :--- |:---- |
| [HBASE-23642](https://issues.apache.org/jira/browse/HBASE-23642) | Reintroduce ReplicationUtils.contains as deprecated |  Major | Replication |
| [HBASE-23575](https://issues.apache.org/jira/browse/HBASE-23575) | Remove dead code from AsyncRegistry interface |  Minor | Client |
| [HBASE-23236](https://issues.apache.org/jira/browse/HBASE-23236) | Upgrade to yetus 0.11.1 |  Major | build |
| [HBASE-23250](https://issues.apache.org/jira/browse/HBASE-23250) | Log message about CleanerChore delegate initialization should be at INFO |  Minor | master, Operability |
| [HBASE-23227](https://issues.apache.org/jira/browse/HBASE-23227) | Upgrade jackson-databind to 2.9.10.1 to avoid recent CVEs |  Blocker | dependencies, REST, security |



## Release 2.2.2 - Unreleased (as of 2019-10-16)

### NEW FEATURES:

| JIRA | Summary | Priority | Component |
|:---- |:---- | :--- |:---- |
| [HBASE-11062](https://issues.apache.org/jira/browse/HBASE-11062) | hbtop |  Major | hbtop |


### IMPROVEMENTS:

| JIRA | Summary | Priority | Component |
|:---- |:---- | :--- |:---- |
| [HBASE-20626](https://issues.apache.org/jira/browse/HBASE-20626) | Change the value of "Requests Per Second" on WEBUI |  Major | metrics, UI |
| [HBASE-23093](https://issues.apache.org/jira/browse/HBASE-23093) | Avoid Optional Anti-Pattern where possible |  Minor | . |
| [HBASE-23114](https://issues.apache.org/jira/browse/HBASE-23114) | Use archiveArtifacts in Jenkinsfiles |  Trivial | . |
| [HBASE-23140](https://issues.apache.org/jira/browse/HBASE-23140) | Remove unknown table error |  Minor | . |
| [HBASE-23095](https://issues.apache.org/jira/browse/HBASE-23095) | Reuse FileStatus in StoreFileInfo |  Major | mob, snapshots |
| [HBASE-23116](https://issues.apache.org/jira/browse/HBASE-23116) | LoadBalancer should log table name when balancing per table |  Minor | . |
| [HBASE-22874](https://issues.apache.org/jira/browse/HBASE-22874) | Define a public interface for Canary and move existing implementation to LimitedPrivate |  Critical | canary |
| [HBASE-22930](https://issues.apache.org/jira/browse/HBASE-22930) | Set unique name to longCompactions/shortCompactions threads |  Minor | . |
| [HBASE-23035](https://issues.apache.org/jira/browse/HBASE-23035) | Retain region to the last RegionServer make the failover slower |  Major | . |
| [HBASE-23075](https://issues.apache.org/jira/browse/HBASE-23075) | Upgrade jackson to version 2.9.10 due to CVE-2019-16335 and CVE-2019-14540 |  Major | dependencies, hbase-connectors, REST, security |
| [HBASE-22975](https://issues.apache.org/jira/browse/HBASE-22975) | Add read and write QPS metrics at server level and table level |  Minor | metrics |
| [HBASE-23058](https://issues.apache.org/jira/browse/HBASE-23058) | Should be "Column Family Name" in table.jsp |  Minor | . |
| [HBASE-23049](https://issues.apache.org/jira/browse/HBASE-23049) | TableDescriptors#getAll should return the tables ordering by the name which contain namespace |  Minor | . |
| [HBASE-23041](https://issues.apache.org/jira/browse/HBASE-23041) | Should not show split parent regions in HBCK report's unknown server part |  Major | . |
| [HBASE-23044](https://issues.apache.org/jira/browse/HBASE-23044) | CatalogJanitor#cleanMergeQualifier may clean wrong parent regions |  Critical | . |
| [HBASE-23037](https://issues.apache.org/jira/browse/HBASE-23037) | Make the split WAL related log more readable |  Minor | . |
| [HBASE-22846](https://issues.apache.org/jira/browse/HBASE-22846) | Internal Error 500 when Using HBASE REST API to Create Namespace. |  Major | hbase-connectors |
| [HBASE-22804](https://issues.apache.org/jira/browse/HBASE-22804) | Provide an API to get list of successful regions and total expected regions in Canary |  Minor | canary |
| [HBASE-22899](https://issues.apache.org/jira/browse/HBASE-22899) | logging improvements for snapshot operations w/large manifests |  Minor | snapshots |
| [HBASE-22701](https://issues.apache.org/jira/browse/HBASE-22701) | Better handle invalid local directory for DynamicClassLoader |  Major | regionserver |


### BUG FIXES:

| JIRA | Summary | Priority | Component |
|:---- |:---- | :--- |:---- |
| [HBASE-22370](https://issues.apache.org/jira/browse/HBASE-22370) | ByteBuf LEAK ERROR |  Major | rpc, wal |
| [HBASE-23078](https://issues.apache.org/jira/browse/HBASE-23078) | BaseLoadBalancer should consider region replicas when randomAssignment and roundRobinAssignment |  Major | . |
| [HBASE-23155](https://issues.apache.org/jira/browse/HBASE-23155) | May NPE when concurrent AsyncNonMetaRegionLocator#updateCachedLocationOnError |  Major | asyncclient |
| [HBASE-21540](https://issues.apache.org/jira/browse/HBASE-21540) | when set property  "hbase.systemtables.compacting.memstore.type" to "basic" or "eager" will  cause an exception |  Major | conf |
| [HBASE-23153](https://issues.apache.org/jira/browse/HBASE-23153) | PrimaryRegionCountSkewCostFunction SLB function should implement CostFunction#isNeeded |  Major | . |
| [HBASE-23154](https://issues.apache.org/jira/browse/HBASE-23154) | list\_deadservers return incorrect no of rows |  Minor | shell |
| [HBASE-23152](https://issues.apache.org/jira/browse/HBASE-23152) | Compaction\_switch does not work by RegionServer name |  Major | Client, Compaction |
| [HBASE-23115](https://issues.apache.org/jira/browse/HBASE-23115) | Unit change for StoreFileSize and MemStoreSize |  Minor | metrics, UI |
| [HBASE-23138](https://issues.apache.org/jira/browse/HBASE-23138) | Drop\_all table by regex fail from Shell -  Similar to HBASE-23134 |  Major | shell |
| [HBASE-23139](https://issues.apache.org/jira/browse/HBASE-23139) | MapReduce jobs lauched from convenience distribution are nonfunctional |  Blocker | mapreduce |
| [HBASE-22767](https://issues.apache.org/jira/browse/HBASE-22767) | System table RIT STUCK if their RSGroup has no highest version RSes |  Major | rsgroup |
| [HBASE-23134](https://issues.apache.org/jira/browse/HBASE-23134) | Enable\_all and Disable\_all table by Regex fail from Shell |  Major | shell |
| [HBASE-22903](https://issues.apache.org/jira/browse/HBASE-22903) | alter\_status command is broken |  Major | metrics, shell |
| [HBASE-23094](https://issues.apache.org/jira/browse/HBASE-23094) | Wrong log message in simpleRegionNormaliser while checking if merge is enabled. |  Minor | . |
| [HBASE-23125](https://issues.apache.org/jira/browse/HBASE-23125) | TestRSGroupsAdmin2 is flaky |  Major | test |
| [HBASE-23119](https://issues.apache.org/jira/browse/HBASE-23119) | ArrayIndexOutOfBoundsException in PrivateCellUtil#qualifierStartsWith |  Major | . |
| [HBASE-23054](https://issues.apache.org/jira/browse/HBASE-23054) | Remove synchronization block from MetaTableMetrics and fix LossyCounting algorithm |  Major | metrics |
| [HBASE-22380](https://issues.apache.org/jira/browse/HBASE-22380) | break circle replication when doing bulkload |  Critical | Replication |
| [HBASE-23079](https://issues.apache.org/jira/browse/HBASE-23079) | RegionRemoteProcedureBase should override setTimeoutFailure |  Blocker | amv2 |
| [HBASE-22965](https://issues.apache.org/jira/browse/HBASE-22965) | RS Crash due to DBE reference to an reused ByteBuff |  Major | . |
| [HBASE-22012](https://issues.apache.org/jira/browse/HBASE-22012) | SpaceQuota DisableTableViolationPolicy will cause cycles of enable/disable table |  Major | . |
| [HBASE-22944](https://issues.apache.org/jira/browse/HBASE-22944) | TableNotFoundException: hbase:quota  is thrown when region server is restarted. |  Minor | Quotas |
| [HBASE-22142](https://issues.apache.org/jira/browse/HBASE-22142) | Space quota: If table inside namespace having space quota is dropped, data size  usage is still considered for the drop table. |  Minor | . |
| [HBASE-22649](https://issues.apache.org/jira/browse/HBASE-22649) | Encode StoreFile path URLs in the UI to handle scenarios where CF contains special characters (like # etc.) |  Major | UI |
| [HBASE-23051](https://issues.apache.org/jira/browse/HBASE-23051) | Remove unneeded Mockito.mock invocations |  Major | test |
| [HBASE-23005](https://issues.apache.org/jira/browse/HBASE-23005) | Table UI showed exception message when table is disabled |  Minor | . |
| [HBASE-23040](https://issues.apache.org/jira/browse/HBASE-23040) | region mover gives NullPointerException instead of saying a host isn't in the cluster |  Minor | . |
| [HBASE-23043](https://issues.apache.org/jira/browse/HBASE-23043) | TestWALEntryStream times out |  Major | wal |
| [HBASE-22955](https://issues.apache.org/jira/browse/HBASE-22955) | Branches-1 precommit and nightly yetus jobs are using jdk8 for jdk7 jobs |  Major | . |
| [HBASE-22929](https://issues.apache.org/jira/browse/HBASE-22929) | MemStoreLAB  ChunkCreator may memory leak |  Major | . |
| [HBASE-23006](https://issues.apache.org/jira/browse/HBASE-23006) | RSGroupBasedLoadBalancer should also try to place replicas for the same region to different region servers |  Major | Region Assignment, rsgroup |
| [HBASE-23007](https://issues.apache.org/jira/browse/HBASE-23007) | UnsatisfiedLinkError when using hbase-shaded packages under linux |  Critical | shading |
| [HBASE-22013](https://issues.apache.org/jira/browse/HBASE-22013) | SpaceQuotas - getNumRegions() returning wrong number of regions due to region replicas |  Major | . |
| [HBASE-22979](https://issues.apache.org/jira/browse/HBASE-22979) | Call ChunkCreator.initialize in TestHRegionWithInMemoryFlush |  Critical | . |
| [HBASE-22964](https://issues.apache.org/jira/browse/HBASE-22964) | Fix flaky TestClusterRestartFailover and TestClusterRestartFailoverSplitWithoutZk |  Major | . |
| [HBASE-22963](https://issues.apache.org/jira/browse/HBASE-22963) | Netty ByteBuf leak in rpc client implementation |  Major | rpc |
| [HBASE-22981](https://issues.apache.org/jira/browse/HBASE-22981) | Remove unused flags for Yetus |  Critical | build |


### SUB-TASKS:

| JIRA | Summary | Priority | Component |
|:---- |:---- | :--- |:---- |
| [HBASE-23168](https://issues.apache.org/jira/browse/HBASE-23168) | Generate CHANGES.md and RELEASENOTES.md for 2.2.2 |  Major | documentation |
| [HBASE-23167](https://issues.apache.org/jira/browse/HBASE-23167) | Set version as 2.2.2 in branch-2.2 in prep for first RC of 2.2.2 |  Major | build |
| [HBASE-23163](https://issues.apache.org/jira/browse/HBASE-23163) | Refactor HStore.getStorefilesSize related methods |  Major | regionserver |
| [HBASE-22927](https://issues.apache.org/jira/browse/HBASE-22927) | Upgrade mockito version for Java 11 compatibility |  Major | . |
| [HBASE-23027](https://issues.apache.org/jira/browse/HBASE-23027) | Set version to 2.2.2-SNAPSHOT in branch-2.2 |  Major | . |
| [HBASE-22796](https://issues.apache.org/jira/browse/HBASE-22796) | [HBCK2] Add fix of overlaps to fixMeta hbck Service |  Major | . |
| [HBASE-22993](https://issues.apache.org/jira/browse/HBASE-22993) | HBCK report UI showed -1 if hbck chore not running |  Minor | . |
| [HBASE-23014](https://issues.apache.org/jira/browse/HBASE-23014) | Should not show split parent regions in hbck report UI |  Major | . |
| [HBASE-22859](https://issues.apache.org/jira/browse/HBASE-22859) | [HBCK2] Fix the orphan regions on filesystem |  Major | documentation, hbck2 |


### OTHER:

| JIRA | Summary | Priority | Component |
|:---- |:---- | :--- |:---- |
| [HBASE-21745](https://issues.apache.org/jira/browse/HBASE-21745) | Make HBCK2 be able to fix issues other than region assignment |  Critical | hbase-operator-tools, hbck2 |
| [HBASE-23053](https://issues.apache.org/jira/browse/HBASE-23053) | Disable concurrent nightly builds |  Minor | build |
| [HBASE-23023](https://issues.apache.org/jira/browse/HBASE-23023) | upgrade shellcheck used to test in nightly and precommit |  Major | build |



## Release 2.2.1 - Unreleased (as of 2019-09-04)

### INCOMPATIBLE CHANGES:

| JIRA | Summary | Priority | Component |
|:---- |:---- | :--- |:---- |
| [HBASE-22690](https://issues.apache.org/jira/browse/HBASE-22690) | Deprecate / Remove OfflineMetaRepair in hbase-2+ |  Major | hbck2 |


### NEW FEATURES:

| JIRA | Summary | Priority | Component |
|:---- |:---- | :--- |:---- |
| [HBASE-15666](https://issues.apache.org/jira/browse/HBASE-15666) | shaded dependencies for hbase-testing-util |  Critical | test |


### IMPROVEMENTS:

| JIRA | Summary | Priority | Component |
|:---- |:---- | :--- |:---- |
| [HBASE-22724](https://issues.apache.org/jira/browse/HBASE-22724) | Add a emoji on the vote table for pre commit result on github |  Major | build, test |
| [HBASE-22954](https://issues.apache.org/jira/browse/HBASE-22954) | Whitelist net.java.dev.jna which got pulled in through Hadoop 3.3.0 |  Minor | community, hadoop3 |
| [HBASE-22905](https://issues.apache.org/jira/browse/HBASE-22905) | Avoid temp ByteBuffer allocation in BlockingRpcConnection#writeRequest |  Major | . |
| [HBASE-22962](https://issues.apache.org/jira/browse/HBASE-22962) | Fix typo in javadoc description |  Minor | documentation |
| [HBASE-22933](https://issues.apache.org/jira/browse/HBASE-22933) | Do not need to kick reassign for rs group change any more |  Major | rsgroup |
| [HBASE-22872](https://issues.apache.org/jira/browse/HBASE-22872) | Don't create normalization plan unnecesarily when split and merge both are disabled |  Minor | . |
| [HBASE-20509](https://issues.apache.org/jira/browse/HBASE-20509) | Put List in HashSet directly without using addAll function to improve performance |  Trivial | Performance |
| [HBASE-21996](https://issues.apache.org/jira/browse/HBASE-21996) | Set locale for javadoc |  Major | documentation |
| [HBASE-22464](https://issues.apache.org/jira/browse/HBASE-22464) | Improvements to hbase-vote script |  Trivial | scripts |
| [HBASE-22810](https://issues.apache.org/jira/browse/HBASE-22810) | Initialize an separate ThreadPoolExecutor for taking/restoring snapshot |  Major | . |
| [HBASE-22844](https://issues.apache.org/jira/browse/HBASE-22844) | Fix Checkstyle issues in client snapshot exceptions |  Minor | Client |
| [HBASE-22871](https://issues.apache.org/jira/browse/HBASE-22871) | Move the DirScanPool out and do not use static field |  Major | master |
| [HBASE-22841](https://issues.apache.org/jira/browse/HBASE-22841) | TimeRange's factory functions do not support ranges, only \`allTime\` and \`at\` |  Major | Client |
| [HBASE-22828](https://issues.apache.org/jira/browse/HBASE-22828) | Log a region close journal |  Minor | . |
| [HBASE-22812](https://issues.apache.org/jira/browse/HBASE-22812) | InterfaceAudience annotation in CatalogJanitor uses fully-qualified name |  Minor | . |
| [HBASE-22800](https://issues.apache.org/jira/browse/HBASE-22800) | Add mapreduce dependencies to hbase-shaded-testing-util |  Major | . |
| [HBASE-22731](https://issues.apache.org/jira/browse/HBASE-22731) | ReplicationSource and HBaseInterClusterReplicationEndpoint log messages should include a target Peer identifier |  Minor | Replication |
| [HBASE-22759](https://issues.apache.org/jira/browse/HBASE-22759) | Add user info to AUDITLOG events when doing grant/revoke |  Major | logging, security |
| [HBASE-22785](https://issues.apache.org/jira/browse/HBASE-22785) | Reduce number of Checkstyle issues in client exceptions |  Minor | Client |
| [HBASE-22786](https://issues.apache.org/jira/browse/HBASE-22786) | Fix Checkstyle issues in tests of hbase-client |  Minor | Client |
| [HBASE-22677](https://issues.apache.org/jira/browse/HBASE-22677) | Add unit tests for org.apache.hadoop.hbase.util.ByteRangeUtils and org.apache.hadoop.hbase.util.Classes |  Major | java, test |
| [HBASE-22787](https://issues.apache.org/jira/browse/HBASE-22787) | Clean up of tests in hbase-zookeeper |  Minor | Zookeeper |
| [HBASE-22363](https://issues.apache.org/jira/browse/HBASE-22363) | Remove hardcoded number of read cache block buckets |  Trivial | BlockCache, BucketCache |
| [HBASE-22764](https://issues.apache.org/jira/browse/HBASE-22764) | Fix remaining Checkstyle issues in hbase-rsgroup |  Trivial | rsgroup |
| [HBASE-22763](https://issues.apache.org/jira/browse/HBASE-22763) | Fix remaining Checkstyle issue in hbase-procedure |  Trivial | . |
| [HBASE-22743](https://issues.apache.org/jira/browse/HBASE-22743) | ClientUtils for hbase-examples |  Minor | . |
| [HBASE-22750](https://issues.apache.org/jira/browse/HBASE-22750) | Correct @throws in comment |  Trivial | Client, rpc |
| [HBASE-22702](https://issues.apache.org/jira/browse/HBASE-22702) | [Log] 'Group not found for table' is chatty |  Trivial | . |
| [HBASE-22721](https://issues.apache.org/jira/browse/HBASE-22721) | Refactor HBaseFsck: move the inner class out |  Major | . |
| [HBASE-22692](https://issues.apache.org/jira/browse/HBASE-22692) | Rubocop definition is not used in the /bin directory |  Minor | . |
| [HBASE-22610](https://issues.apache.org/jira/browse/HBASE-22610) | [BucketCache] Rename "hbase.offheapcache.minblocksize" |  Trivial | . |
| [HBASE-22704](https://issues.apache.org/jira/browse/HBASE-22704) | Avoid NPE when access table.jsp and snapshot.jsp but master not finish initialization |  Minor | . |
| [HBASE-22643](https://issues.apache.org/jira/browse/HBASE-22643) | Delete region without archiving only if regiondir is present |  Major | HFile |
| [HBASE-22689](https://issues.apache.org/jira/browse/HBASE-22689) | Line break for fix version in documentation |  Trivial | documentation |
| [HBASE-22638](https://issues.apache.org/jira/browse/HBASE-22638) | Zookeeper Utility enhancements |  Minor | Zookeeper |
| [HBASE-22669](https://issues.apache.org/jira/browse/HBASE-22669) | Add unit tests for org.apache.hadoop.hbase.util.Strings |  Major | java |
| [HBASE-22403](https://issues.apache.org/jira/browse/HBASE-22403) | Balance in RSGroup should consider throttling and a failure affects the whole |  Major | rsgroup |
| [HBASE-22604](https://issues.apache.org/jira/browse/HBASE-22604) | fix the link in the docs to "Understanding HBase and BigTable" by Jim R. Wilson |  Trivial | documentation |
| [HBASE-22624](https://issues.apache.org/jira/browse/HBASE-22624) | Should sanity check table configuration when clone snapshot to a new table |  Major | . |
| [HBASE-22633](https://issues.apache.org/jira/browse/HBASE-22633) | Remove redundant call to substring for ZKReplicationQueueStorage |  Minor | . |
| [HBASE-22595](https://issues.apache.org/jira/browse/HBASE-22595) | Use full qualified name in Checkstyle suppressions |  Trivial | . |
| [HBASE-22454](https://issues.apache.org/jira/browse/HBASE-22454) | refactor WALSplitter |  Major | wal |
| [HBASE-22616](https://issues.apache.org/jira/browse/HBASE-22616) | responseTooXXX logging for Multi should characterize the component ops |  Minor | . |
| [HBASE-22596](https://issues.apache.org/jira/browse/HBASE-22596) | [Chore] Separate the execution period between CompactionChecker and PeriodicMemStoreFlusher |  Minor | Compaction |
| [HBASE-22561](https://issues.apache.org/jira/browse/HBASE-22561) | modify HFilePrettyPrinter to accept non-hbase.rootdir directories |  Minor | . |
| [HBASE-22344](https://issues.apache.org/jira/browse/HBASE-22344) | Document deprecated public APIs |  Major | API, community, documentation |
| [HBASE-22593](https://issues.apache.org/jira/browse/HBASE-22593) | Add local Jenv file to gitignore |  Trivial | . |
| [HBASE-22116](https://issues.apache.org/jira/browse/HBASE-22116) | HttpDoAsClient to support keytab and principal in command line argument. |  Major | . |
| [HBASE-22160](https://issues.apache.org/jira/browse/HBASE-22160) | Add sorting functionality in regionserver web UI for user regions |  Minor | monitoring, regionserver, UI, Usability |


### BUG FIXES:

| JIRA | Summary | Priority | Component |
|:---- |:---- | :--- |:---- |
| [HBASE-22970](https://issues.apache.org/jira/browse/HBASE-22970) | split parents show as overlaps in the HBCK Report |  Major | . |
| [HBASE-22961](https://issues.apache.org/jira/browse/HBASE-22961) | Deprecate hbck1 in core |  Major | hbck |
| [HBASE-22896](https://issues.apache.org/jira/browse/HBASE-22896) | TestHRegion.testFlushMarkersWALFail is flaky |  Minor | . |
| [HBASE-22943](https://issues.apache.org/jira/browse/HBASE-22943) | Various procedures should not cache log trace level |  Minor | proc-v2 |
| [HBASE-22881](https://issues.apache.org/jira/browse/HBASE-22881) | Fix non-daemon threads in hbase server implementation |  Major | master |
| [HBASE-22893](https://issues.apache.org/jira/browse/HBASE-22893) | Change the comment in HBaseClassTestRule to reflect change in default test timeouts |  Trivial | . |
| [HBASE-22928](https://issues.apache.org/jira/browse/HBASE-22928) | ScanMetrics counter update may not happen in case of exception in TableRecordReaderImpl |  Minor | mapreduce |
| [HBASE-22941](https://issues.apache.org/jira/browse/HBASE-22941) | MetaTableAccessor.getMergeRegions() returns parent regions in random order |  Major | . |
| [HBASE-22935](https://issues.apache.org/jira/browse/HBASE-22935) | TaskMonitor warns MonitoredRPCHandler task may be stuck when it recently started |  Minor | logging |
| [HBASE-22857](https://issues.apache.org/jira/browse/HBASE-22857) | Fix the failed ut TestHRegion and TestHRegionWithInMemoryFlush |  Major | . |
| [HBASE-22922](https://issues.apache.org/jira/browse/HBASE-22922) | Only the two first regions are locked in MergeTableRegionsProcedure |  Major | . |
| [HBASE-22852](https://issues.apache.org/jira/browse/HBASE-22852) | hbase nightlies leaking gpg-agents |  Minor | build |
| [HBASE-22867](https://issues.apache.org/jira/browse/HBASE-22867) | The ForkJoinPool in CleanerChore will spawn thousands of threads in our cluster with thousands table |  Critical | master |
| [HBASE-22904](https://issues.apache.org/jira/browse/HBASE-22904) | NPE occurs when RS send space quota usage report during HMaster init |  Minor | . |
| [HBASE-22806](https://issues.apache.org/jira/browse/HBASE-22806) | Deleted CF are not cleared if memstore contain entries |  Major | API |
| [HBASE-22601](https://issues.apache.org/jira/browse/HBASE-22601) | Misconfigured addition of peers leads to cluster shutdown. |  Major | . |
| [HBASE-22863](https://issues.apache.org/jira/browse/HBASE-22863) | Avoid Jackson versions and dependencies with known CVEs |  Major | dependencies |
| [HBASE-22879](https://issues.apache.org/jira/browse/HBASE-22879) | user\_permission command failed to show global permission |  Major | . |
| [HBASE-22882](https://issues.apache.org/jira/browse/HBASE-22882) | TestFlushSnapshotFromClient#testConcurrentSnapshottingAttempts is flakey (was written flakey) |  Major | test |
| [HBASE-22870](https://issues.apache.org/jira/browse/HBASE-22870) | reflection fails to access a private nested class |  Major | master |
| [HBASE-22860](https://issues.apache.org/jira/browse/HBASE-22860) | Master's webui returns NPE/HTTP 500 under maintenance mode |  Major | master, UI |
| [HBASE-22856](https://issues.apache.org/jira/browse/HBASE-22856) | HBASE-Find-Flaky-Tests fails with pip error |  Major | build, test |
| [HBASE-22632](https://issues.apache.org/jira/browse/HBASE-22632) | SplitTableRegionProcedure and MergeTableRegionsProcedure should skip store files for unknown column families |  Major | proc-v2 |
| [HBASE-22838](https://issues.apache.org/jira/browse/HBASE-22838) | assembly:single failure: user id or group id 'xxxxx' is too big |  Major | build |
| [HBASE-22417](https://issues.apache.org/jira/browse/HBASE-22417) | DeleteTableProcedure.deleteFromMeta method should remove table from Master's table descriptors cache |  Major | . |
| [HBASE-22539](https://issues.apache.org/jira/browse/HBASE-22539) | WAL corruption due to early DBBs re-use when Durability.ASYNC\_WAL is used |  Blocker | rpc, wal |
| [HBASE-22801](https://issues.apache.org/jira/browse/HBASE-22801) | Maven build issue on Github PRs |  Major | build |
| [HBASE-22793](https://issues.apache.org/jira/browse/HBASE-22793) | RPC server connection is logging user as NULL principal |  Minor | rpc |
| [HBASE-22778](https://issues.apache.org/jira/browse/HBASE-22778) | Upgrade jasckson databind to 2.9.9.2 |  Blocker | dependencies |
| [HBASE-22773](https://issues.apache.org/jira/browse/HBASE-22773) | when set blockSize option in Performance Evaluation tool, error occurs:ERROR: Unrecognized option/command: --blockSize=131072 |  Minor | mapreduce |
| [HBASE-22735](https://issues.apache.org/jira/browse/HBASE-22735) | list\_regions may throw an error if a region is RIT |  Minor | shell |
| [HBASE-22145](https://issues.apache.org/jira/browse/HBASE-22145) | windows hbase-env causes hbase cli/etc to ignore HBASE\_OPTS |  Major | . |
| [HBASE-22408](https://issues.apache.org/jira/browse/HBASE-22408) | add a metric for regions OPEN on non-live servers |  Major | . |
| [HBASE-22758](https://issues.apache.org/jira/browse/HBASE-22758) | Remove the unneccesary info cf deletion in DeleteTableProcedure#deleteFromMeta |  Major | . |
| [HBASE-22751](https://issues.apache.org/jira/browse/HBASE-22751) | table.jsp fails if ugly regions in table |  Major | UI |
| [HBASE-22733](https://issues.apache.org/jira/browse/HBASE-22733) | TestSplitTransactionOnCluster.testMasterRestartAtRegionSplitPendingCatalogJanitor is flakey |  Major | . |
| [HBASE-22715](https://issues.apache.org/jira/browse/HBASE-22715) | All scan requests should be handled by scan handler threads in RWQueueRpcExecutor |  Minor | . |
| [HBASE-22722](https://issues.apache.org/jira/browse/HBASE-22722) | Upgrade jackson databind dependencies to 2.9.9.1 |  Blocker | dependencies |
| [HBASE-22603](https://issues.apache.org/jira/browse/HBASE-22603) | Javadoc Warnings related to @link tag |  Trivial | documentation |
| [HBASE-22720](https://issues.apache.org/jira/browse/HBASE-22720) | Incorrect link for hbase.unittests |  Trivial | documentation |
| [HBASE-21426](https://issues.apache.org/jira/browse/HBASE-21426) | TestEncryptionKeyRotation.testCFKeyRotation is flaky |  Major | . |
| [HBASE-20368](https://issues.apache.org/jira/browse/HBASE-20368) | Fix RIT stuck when a rsgroup has no online servers but AM's pendingAssginQueue is cleared |  Major | rsgroup |
| [HBASE-22700](https://issues.apache.org/jira/browse/HBASE-22700) | Incorrect timeout in recommended ZooKeeper configuration |  Minor | documentation |
| [HBASE-22661](https://issues.apache.org/jira/browse/HBASE-22661) | list\_regions command in hbase shell is broken |  Major | shell |
| [HBASE-22684](https://issues.apache.org/jira/browse/HBASE-22684) | The log rolling request maybe canceled immediately in LogRoller due to a race |  Major | wal |
| [HBASE-22586](https://issues.apache.org/jira/browse/HBASE-22586) | Javadoc Warnings related to @param tag |  Trivial | documentation |
| [HBASE-22571](https://issues.apache.org/jira/browse/HBASE-22571) | Javadoc Warnings related to @return tag |  Trivial | documentation |
| [HBASE-22681](https://issues.apache.org/jira/browse/HBASE-22681) | The 'assert highestUnsyncedTxid \< entry.getTxid();' in AbstractFWAL.append may fail when using AsyncFSWAL |  Critical | wal |
| [HBASE-22686](https://issues.apache.org/jira/browse/HBASE-22686) | ZkSplitLogWorkerCoordination doesn't allow a regionserver to pick up all of the split work it is capable of |  Major | . |
| [HBASE-22656](https://issues.apache.org/jira/browse/HBASE-22656) | [Metrics]  Tabe metrics 'BatchPut' and 'BatchDelete' are never updated |  Minor | metrics |
| [HBASE-22582](https://issues.apache.org/jira/browse/HBASE-22582) | The Compaction writer may access the lastCell whose memory has been released when appending fileInfo in the final |  Major | Compaction |
| [HBASE-22652](https://issues.apache.org/jira/browse/HBASE-22652) | Flakey TestLockManager; test timed out after 780 seconds |  Major | proc-v2 |
| [HBASE-22637](https://issues.apache.org/jira/browse/HBASE-22637) | fix flaky TestMetaTableMetrics test |  Major | metrics, test |
| [HBASE-13798](https://issues.apache.org/jira/browse/HBASE-13798) | TestFromClientSide\* don't close the Table |  Trivial | test |
| [HBASE-21751](https://issues.apache.org/jira/browse/HBASE-21751) | WAL creation fails during region open may cause region assign forever fail |  Major | . |
| [HBASE-22477](https://issues.apache.org/jira/browse/HBASE-22477) | Throwing exception when meta region is not in OPEN state in client registry may crash a master |  Major | Client, master, meta |
| [HBASE-22169](https://issues.apache.org/jira/browse/HBASE-22169) | Open region failed cause memory leak |  Critical | . |
| [HBASE-22617](https://issues.apache.org/jira/browse/HBASE-22617) | Recovered WAL directories not getting cleaned up |  Blocker | wal |
| [HBASE-22605](https://issues.apache.org/jira/browse/HBASE-22605) | Ref guide includes dev guidance only applicable to EOM versions |  Trivial | documentation |
| [HBASE-22565](https://issues.apache.org/jira/browse/HBASE-22565) | Javadoc Warnings: @see cannot be used in inline documentation |  Trivial | documentation |
| [HBASE-22562](https://issues.apache.org/jira/browse/HBASE-22562) | PressureAwareThroughputController#skipControl never invoked |  Trivial | Operability |
| [HBASE-22559](https://issues.apache.org/jira/browse/HBASE-22559) | [RPC] set guard against CALL\_QUEUE\_HANDLER\_FACTOR\_CONF\_KEY |  Minor | rpc |
| [HBASE-22530](https://issues.apache.org/jira/browse/HBASE-22530) | The metrics of store files count of region are returned to clients incorrectly |  Minor | metrics, regionserver |
| [HBASE-22458](https://issues.apache.org/jira/browse/HBASE-22458) | TestClassFinder fails when run on JDK11 |  Minor | java, test |
| [HBASE-22520](https://issues.apache.org/jira/browse/HBASE-22520) | Avoid possible NPE in HalfStoreFileReader seekBefore() |  Major | . |


### TESTS:

| JIRA | Summary | Priority | Component |
|:---- |:---- | :--- |:---- |
| [HBASE-22886](https://issues.apache.org/jira/browse/HBASE-22886) | Code Coverage Improvement: Create Unit Tests for ConnectionId |  Trivial | test |
| [HBASE-22766](https://issues.apache.org/jira/browse/HBASE-22766) | Code Coverage Improvement: Create Unit Tests for ResultStatsUtil |  Trivial | test |
| [HBASE-22894](https://issues.apache.org/jira/browse/HBASE-22894) | Move testOpenRegionFailedMemoryLeak to dedicated class |  Major | test |
| [HBASE-22725](https://issues.apache.org/jira/browse/HBASE-22725) | Remove all remaining javadoc warnings |  Trivial | test |
| [HBASE-22615](https://issues.apache.org/jira/browse/HBASE-22615) | Make TestChoreService more robust to timing |  Minor | test |


### SUB-TASKS:

| JIRA | Summary | Priority | Component |
|:---- |:---- | :--- |:---- |
| [HBASE-22851](https://issues.apache.org/jira/browse/HBASE-22851) | Preparing HBase release 2.2.1RC0: set version to 2.2.1 in branch-2.2 |  Major | . |
| [HBASE-22878](https://issues.apache.org/jira/browse/HBASE-22878) | Show table throttle quotas in table jsp |  Major | . |
| [HBASE-22946](https://issues.apache.org/jira/browse/HBASE-22946) | Fix TableNotFound when grant/revoke if AccessController is not loaded |  Major | . |
| [HBASE-22945](https://issues.apache.org/jira/browse/HBASE-22945) | Show quota infos in master UI |  Major | master, UI |
| [HBASE-22858](https://issues.apache.org/jira/browse/HBASE-22858) | Add HBCK Report to master's header.jsp |  Minor | master |
| [HBASE-22891](https://issues.apache.org/jira/browse/HBASE-22891) | Use HBaseQA in HBase-PreCommit-GitHub-PR job |  Major | build, scripts |
| [HBASE-22771](https://issues.apache.org/jira/browse/HBASE-22771) | [HBCK2] fixMeta method and server-side support |  Major | hbck2 |
| [HBASE-22845](https://issues.apache.org/jira/browse/HBASE-22845) | Revert MetaTableAccessor#makePutFromTableState access to public |  Blocker | . |
| [HBASE-22777](https://issues.apache.org/jira/browse/HBASE-22777) | Add a multi-region merge (for fixing overlaps, etc.) |  Major | hbck2, proc-v2 |
| [HBASE-22803](https://issues.apache.org/jira/browse/HBASE-22803) | Modify config value range to enable turning off of the hbck chore |  Major | . |
| [HBASE-22824](https://issues.apache.org/jira/browse/HBASE-22824) | Show filesystem path for the orphans regions on filesystem |  Major | . |
| [HBASE-22808](https://issues.apache.org/jira/browse/HBASE-22808) | HBCK Report showed the offline regions which belong to disabled table |  Major | . |
| [HBASE-22807](https://issues.apache.org/jira/browse/HBASE-22807) | HBCK Report showed wrong orphans regions on FileSystem |  Major | . |
| [HBASE-22737](https://issues.apache.org/jira/browse/HBASE-22737) | Add a new admin method and shell cmd to trigger the hbck chore to run |  Major | . |
| [HBASE-22741](https://issues.apache.org/jira/browse/HBASE-22741) | Show catalogjanitor consistency complaints in new 'HBCK Report' page |  Major | hbck2, UI |
| [HBASE-22723](https://issues.apache.org/jira/browse/HBASE-22723) | Have CatalogJanitor report holes and overlaps; i.e. problems it sees when doing its regular scan of hbase:meta |  Major | . |
| [HBASE-22709](https://issues.apache.org/jira/browse/HBASE-22709) | Add a chore thread in master to do hbck checking and display results in 'HBCK Report' page |  Major | . |
| [HBASE-22742](https://issues.apache.org/jira/browse/HBASE-22742) | [HBCK2] Add more log for hbck operations at master side |  Minor | . |
| [HBASE-22527](https://issues.apache.org/jira/browse/HBASE-22527) | [hbck2] Add a master web ui to show the problematic regions |  Major | hbase-operator-tools, hbck2 |
| [HBASE-22719](https://issues.apache.org/jira/browse/HBASE-22719) | Add debug support for github PR pre commit job |  Major | build |
| [HBASE-22673](https://issues.apache.org/jira/browse/HBASE-22673) | Avoid to expose protobuf stuff in Hbck interface |  Major | hbck2 |
| [HBASE-7191](https://issues.apache.org/jira/browse/HBASE-7191) | HBCK - Add offline create/fix hbase.version and hbase.id |  Major | hbck |
| [HBASE-22600](https://issues.apache.org/jira/browse/HBASE-22600) | Document that LoadIncrementalHFiles will be removed in 3.0.0 |  Major | . |
| [HBASE-22569](https://issues.apache.org/jira/browse/HBASE-22569) | Should treat null consistency as Consistency.STRONG in ConnectionUtils.timelineConsistentRead |  Major | . |


### OTHER:

| JIRA | Summary | Priority | Component |
|:---- |:---- | :--- |:---- |
| [HBASE-22833](https://issues.apache.org/jira/browse/HBASE-22833) | MultiRowRangeFilter should provide a method for creating a filter which is functionally equivalent to multiple prefix filters |  Minor | Client |
| [HBASE-22895](https://issues.apache.org/jira/browse/HBASE-22895) | Fix the flakey TestSpaceQuotas |  Major | Quotas, test |
| [HBASE-22914](https://issues.apache.org/jira/browse/HBASE-22914) | Backport HBASE-20662 to branch-2.2 |  Major | . |
| [HBASE-22910](https://issues.apache.org/jira/browse/HBASE-22910) | Enable TestMultiVersionConcurrencyControl |  Major | test |
| [HBASE-22913](https://issues.apache.org/jira/browse/HBASE-22913) | Use Hadoop label for nightly builds |  Major | build |
| [HBASE-22911](https://issues.apache.org/jira/browse/HBASE-22911) | fewer concurrent github PR builds |  Critical | build |
| [HBASE-21400](https://issues.apache.org/jira/browse/HBASE-21400) | correct spelling error of 'initilize' in comment |  Trivial | documentation |
| [HBASE-22382](https://issues.apache.org/jira/browse/HBASE-22382) | Refactor tests in TestFromClientSide |  Major | test |
| [HBASE-21606](https://issues.apache.org/jira/browse/HBASE-21606) | Document use of the meta table load metrics added in HBASE-19722 |  Critical | documentation, meta, metrics, Operability |
| [HBASE-19230](https://issues.apache.org/jira/browse/HBASE-19230) | Write up fixVersion policy from dev discussion in refguide |  Major | documentation |
| [HBASE-22566](https://issues.apache.org/jira/browse/HBASE-22566) | Call out default compaction throttling for 2.x in Book |  Major | documentation |
| [HBASE-22560](https://issues.apache.org/jira/browse/HBASE-22560) | Upgrade to Jetty 9.3.latest and Jackson 2.9.latest |  Major | dependencies |



## Release 2.2.0 - Unreleased (as of 2019-06-11)

### INCOMPATIBLE CHANGES:

| JIRA | Summary | Priority | Component |
|:---- |:---- | :--- |:---- |
| [HBASE-21991](https://issues.apache.org/jira/browse/HBASE-21991) | Fix MetaMetrics issues - [Race condition, Faulty remove logic], few improvements |  Major | Coprocessors, metrics |
| [HBASE-22399](https://issues.apache.org/jira/browse/HBASE-22399) | Change default hadoop-two.version to 2.8.x and remove the 2.7.x hadoop checks |  Major | build, hadoop2 |
| [HBASE-21082](https://issues.apache.org/jira/browse/HBASE-21082) | Reimplement assign/unassign related procedure metrics |  Critical | amv2, metrics |
| [HBASE-20587](https://issues.apache.org/jira/browse/HBASE-20587) | Replace Jackson with shaded thirdparty gson |  Major | dependencies |
| [HBASE-21727](https://issues.apache.org/jira/browse/HBASE-21727) | Simplify documentation around client timeout |  Minor | . |
| [HBASE-21684](https://issues.apache.org/jira/browse/HBASE-21684) | Throw DNRIOE when connection or rpc client is closed |  Major | asyncclient, Client |
| [HBASE-21792](https://issues.apache.org/jira/browse/HBASE-21792) | Mark HTableMultiplexer as deprecated and remove it in 3.0.0 |  Major | Client |
| [HBASE-21657](https://issues.apache.org/jira/browse/HBASE-21657) | PrivateCellUtil#estimatedSerializedSizeOf has been the bottleneck in 100% scan case. |  Major | Performance |
| [HBASE-21560](https://issues.apache.org/jira/browse/HBASE-21560) | Return a new TableDescriptor for MasterObserver#preModifyTable to allow coprocessor modify the TableDescriptor |  Major | Coprocessors |
| [HBASE-21492](https://issues.apache.org/jira/browse/HBASE-21492) | CellCodec Written To WAL Before It's Verified |  Critical | wal |
| [HBASE-21452](https://issues.apache.org/jira/browse/HBASE-21452) | Illegal character in hbase counters group name |  Major | spark |
| [HBASE-21158](https://issues.apache.org/jira/browse/HBASE-21158) | Empty qualifier cell should not be returned if it does not match QualifierFilter |  Critical | Filters |
| [HBASE-21223](https://issues.apache.org/jira/browse/HBASE-21223) | [amv2] Remove abort\_procedure from shell |  Critical | amv2, hbck2, shell |
| [HBASE-20881](https://issues.apache.org/jira/browse/HBASE-20881) | Introduce a region transition procedure to handle all the state transition for a region |  Major | amv2, proc-v2 |
| [HBASE-20884](https://issues.apache.org/jira/browse/HBASE-20884) | Replace usage of our Base64 implementation with java.util.Base64 |  Major | . |


### NEW FEATURES:

| JIRA | Summary | Priority | Component |
|:---- |:---- | :--- |:---- |
| [HBASE-22148](https://issues.apache.org/jira/browse/HBASE-22148) | Provide an alternative to CellUtil.setTimestamp |  Blocker | API, Coprocessors |
| [HBASE-21815](https://issues.apache.org/jira/browse/HBASE-21815) | Make isTrackingMetrics and getMetrics of ScannerContext public |  Minor | . |
| [HBASE-21926](https://issues.apache.org/jira/browse/HBASE-21926) | Profiler servlet |  Major | master, Operability, regionserver |
| [HBASE-20886](https://issues.apache.org/jira/browse/HBASE-20886) | [Auth] Support keytab login in hbase client |  Critical | asyncclient, Client, security |
| [HBASE-17942](https://issues.apache.org/jira/browse/HBASE-17942) | Disable region splits and merges per table |  Major | . |
| [HBASE-21753](https://issues.apache.org/jira/browse/HBASE-21753) | Support getting the locations for all the replicas of a region |  Major | Client |
| [HBASE-20636](https://issues.apache.org/jira/browse/HBASE-20636) | Introduce two bloom filter type : ROWPREFIX\_FIXED\_LENGTH and ROWPREFIX\_DELIMITED |  Major | HFile, regionserver, Scanners |
| [HBASE-20649](https://issues.apache.org/jira/browse/HBASE-20649) | Validate HFiles do not have PREFIX\_TREE DataBlockEncoding |  Minor | Operability, tooling |


### IMPROVEMENTS:

| JIRA | Summary | Priority | Component |
|:---- |:---- | :--- |:---- |
| [HBASE-22284](https://issues.apache.org/jira/browse/HBASE-22284) | optimization StringBuilder.append of AbstractMemStore.toString |  Trivial | . |
| [HBASE-22523](https://issues.apache.org/jira/browse/HBASE-22523) | Refactor RegionStates#getAssignmentsByTable to make it easy to understand |  Major | . |
| [HBASE-22511](https://issues.apache.org/jira/browse/HBASE-22511) | More missing /rs-status links |  Minor | UI |
| [HBASE-22496](https://issues.apache.org/jira/browse/HBASE-22496) | UnsafeAccess.unsafeCopy should not copy more than UNSAFE\_COPY\_THRESHOLD on each iteration |  Major | . |
| [HBASE-22488](https://issues.apache.org/jira/browse/HBASE-22488) | Cleanup the explicit timeout value for test methods |  Major | . |
| [HBASE-22411](https://issues.apache.org/jira/browse/HBASE-22411) | Refactor codes of moving reigons in RSGroup |  Major | rsgroup |
| [HBASE-22467](https://issues.apache.org/jira/browse/HBASE-22467) | WebUI changes to enable Apache Knox UI proxying |  Major | UI |
| [HBASE-22474](https://issues.apache.org/jira/browse/HBASE-22474) | Add --mvn-custom-repo parameter to yetus calls |  Minor | . |
| [HBASE-20305](https://issues.apache.org/jira/browse/HBASE-20305) | Add option to SyncTable that skip deletes on target cluster |  Minor | mapreduce |
| [HBASE-21784](https://issues.apache.org/jira/browse/HBASE-21784) | Dump replication queue should show list of wal files ordered chronologically |  Major | Replication, tooling |
| [HBASE-22384](https://issues.apache.org/jira/browse/HBASE-22384) | Formatting issues in administration section of book |  Minor | community, documentation |
| [HBASE-21658](https://issues.apache.org/jira/browse/HBASE-21658) | Should get the meta replica number from zk instead of config at client side |  Critical | Client |
| [HBASE-22365](https://issues.apache.org/jira/browse/HBASE-22365) | Region may be opened on two RegionServers |  Blocker | amv2 |
| [HBASE-22392](https://issues.apache.org/jira/browse/HBASE-22392) | Remove extra/useless + |  Trivial | . |
| [HBASE-20494](https://issues.apache.org/jira/browse/HBASE-20494) | Upgrade com.yammer.metrics dependency |  Major | dependencies |
| [HBASE-22358](https://issues.apache.org/jira/browse/HBASE-22358) | Change rubocop configuration for method length |  Minor | community, shell |
| [HBASE-22379](https://issues.apache.org/jira/browse/HBASE-22379) | Fix Markdown for "Voting on Release Candidates" in book |  Minor | community, documentation |
| [HBASE-22109](https://issues.apache.org/jira/browse/HBASE-22109) | Update hbase shaded content checker after guava update in hadoop branch-3.0 to 27.0-jre |  Minor | . |
| [HBASE-22087](https://issues.apache.org/jira/browse/HBASE-22087) | Update LICENSE/shading for the dependencies from the latest Hadoop trunk |  Minor | hadoop3 |
| [HBASE-22341](https://issues.apache.org/jira/browse/HBASE-22341) | Add explicit guidelines for removing deprecations in book |  Major | API, community, documentation |
| [HBASE-22225](https://issues.apache.org/jira/browse/HBASE-22225) | Profiler tab on Master/RS UI not working w/o comprehensive message |  Minor | UI |
| [HBASE-22291](https://issues.apache.org/jira/browse/HBASE-22291) | Fix recovery of recovered.edits files under root dir |  Major | . |
| [HBASE-22283](https://issues.apache.org/jira/browse/HBASE-22283) | Print row and table information when failed to get region location |  Major | Client, logging |
| [HBASE-22296](https://issues.apache.org/jira/browse/HBASE-22296) | Remove TestFromClientSide.testGetStartEndKeysWithRegionReplicas |  Major | test |
| [HBASE-22250](https://issues.apache.org/jira/browse/HBASE-22250) | The same constants used in many places should be placed in constant classes |  Minor | Client, conf, regionserver |
| [HBASE-20586](https://issues.apache.org/jira/browse/HBASE-20586) | SyncTable tool: Add support for cross-realm remote clusters |  Major | mapreduce, Operability, Replication |
| [HBASE-21257](https://issues.apache.org/jira/browse/HBASE-21257) | misspelled words.[occured -\> occurred] |  Trivial | . |
| [HBASE-22193](https://issues.apache.org/jira/browse/HBASE-22193) | Add backoff when region failed open too many times |  Major | . |
| [HBASE-22188](https://issues.apache.org/jira/browse/HBASE-22188) | Make TestSplitMerge more stable |  Major | test |
| [HBASE-22097](https://issues.apache.org/jira/browse/HBASE-22097) | Modify the description of split command in shell |  Trivial | shell |
| [HBASE-21964](https://issues.apache.org/jira/browse/HBASE-21964) | unset Quota by Throttle Type |  Major | master |
| [HBASE-22093](https://issues.apache.org/jira/browse/HBASE-22093) | Combine TestRestoreSnapshotFromClientWithRegionReplicas to CloneSnapshotFromClientAfterSplittingRegionTestBase#testCloneSnapshotAfterSplittingRegion |  Major | . |
| [HBASE-22009](https://issues.apache.org/jira/browse/HBASE-22009) | Improve RSGroupInfoManagerImpl#getDefaultServers() |  Minor | rsgroup |
| [HBASE-22032](https://issues.apache.org/jira/browse/HBASE-22032) | KeyValue validation should check for null byte array |  Major | . |
| [HBASE-21667](https://issues.apache.org/jira/browse/HBASE-21667) | Move to latest ASF Parent POM |  Minor | build |
| [HBASE-21810](https://issues.apache.org/jira/browse/HBASE-21810) | bulkload  support set hfile compression on client |  Major | mapreduce |
| [HBASE-21987](https://issues.apache.org/jira/browse/HBASE-21987) | Simplify RSGroupInfoManagerImpl#flushConfig() for offline mode |  Minor | rsgroup |
| [HBASE-21871](https://issues.apache.org/jira/browse/HBASE-21871) | Support to specify a peer table name in VerifyReplication tool |  Major | . |
| [HBASE-21255](https://issues.apache.org/jira/browse/HBASE-21255) | [acl] Refactor TablePermission into three classes (Global, Namespace, Table) |  Major | . |
| [HBASE-21410](https://issues.apache.org/jira/browse/HBASE-21410) | A helper page that help find all problematic regions and procedures |  Major | . |
| [HBASE-20734](https://issues.apache.org/jira/browse/HBASE-20734) | Colocate recovered edits directory with hbase.wal.dir |  Major | MTTR, Recovery, wal |
| [HBASE-20401](https://issues.apache.org/jira/browse/HBASE-20401) | Make \`MAX\_WAIT\` and \`waitIfNotFinished\` in CleanerContext configurable |  Minor | master |
| [HBASE-21481](https://issues.apache.org/jira/browse/HBASE-21481) | [acl] Superuser's permissions should not be granted or revoked by any non-su global admin |  Major | . |
| [HBASE-21967](https://issues.apache.org/jira/browse/HBASE-21967) | Split TestServerCrashProcedure and TestServerCrashProcedureWithReplicas |  Major | . |
| [HBASE-21867](https://issues.apache.org/jira/browse/HBASE-21867) | Support multi-threads in HFileArchiver |  Major | . |
| [HBASE-21932](https://issues.apache.org/jira/browse/HBASE-21932) | Use Runtime.getRuntime().halt to terminate regionserver when abort timeout |  Major | . |
| [HBASE-21875](https://issues.apache.org/jira/browse/HBASE-21875) | Change the retry logic in RSProcedureDispatcher to 'retry by default, only if xxx' |  Major | proc-v2 |
| [HBASE-21780](https://issues.apache.org/jira/browse/HBASE-21780) | Avoid a wide line on the RegionServer webUI for many ZooKeeper servers |  Minor | UI, Usability |
| [HBASE-21636](https://issues.apache.org/jira/browse/HBASE-21636) | Enhance the shell scan command to support missing scanner specifications like ReadType, IsolationLevel etc. |  Major | shell |
| [HBASE-21857](https://issues.apache.org/jira/browse/HBASE-21857) | Do not need to check clusterKey if replicationEndpoint is provided when adding a peer |  Major | . |
| [HBASE-21201](https://issues.apache.org/jira/browse/HBASE-21201) | Support to run VerifyReplication MR tool without peerid |  Major | hbase-operator-tools |
| [HBASE-21816](https://issues.apache.org/jira/browse/HBASE-21816) | Print source cluster replication config directory |  Trivial | Replication |
| [HBASE-19616](https://issues.apache.org/jira/browse/HBASE-19616) | Review of LogCleaner Class |  Minor | . |
| [HBASE-21830](https://issues.apache.org/jira/browse/HBASE-21830) | Backport HBASE-20577 (Make Log Level page design consistent with the design of other pages in UI) to branch-2 |  Major | UI, Usability |
| [HBASE-21833](https://issues.apache.org/jira/browse/HBASE-21833) | Use NettyAsyncFSWALConfigHelper.setEventLoopConfig to prevent creating too many netty event loop when executing TestHRegion |  Minor | test |
| [HBASE-21634](https://issues.apache.org/jira/browse/HBASE-21634) | Print error message when user uses unacceptable values for LIMIT while setting quotas. |  Minor | . |
| [HBASE-21789](https://issues.apache.org/jira/browse/HBASE-21789) | Rewrite MetaTableAccessor.multiMutate with Table.coprocessorService |  Major | Client, Coprocessors |
| [HBASE-21689](https://issues.apache.org/jira/browse/HBASE-21689) | Make table/namespace specific current quota info available in shell(describe\_namespace & describe) |  Minor | . |
| [HBASE-20215](https://issues.apache.org/jira/browse/HBASE-20215) | Rename CollectionUtils to ConcurrentMapUtils |  Trivial | . |
| [HBASE-21720](https://issues.apache.org/jira/browse/HBASE-21720) | metric to measure how actions are distributed to servers within a MultiAction |  Minor | Client, metrics, monitoring |
| [HBASE-21595](https://issues.apache.org/jira/browse/HBASE-21595) | Print thread's information and stack traces when RS is aborting forcibly |  Minor | regionserver |
| [HBASE-20209](https://issues.apache.org/jira/browse/HBASE-20209) | Do Not Use Both Map containsKey and get Methods in Replication Sink |  Trivial | Replication |
| [HBASE-21712](https://issues.apache.org/jira/browse/HBASE-21712) | Make submit-patch.py python3 compatible |  Minor | tooling |
| [HBASE-21590](https://issues.apache.org/jira/browse/HBASE-21590) | Optimize trySkipToNextColumn in StoreScanner a bit |  Critical | Performance, Scanners |
| [HBASE-21297](https://issues.apache.org/jira/browse/HBASE-21297) | ModifyTableProcedure can throw TNDE instead of IOE in case of REGION\_REPLICATION change |  Minor | . |
| [HBASE-21700](https://issues.apache.org/jira/browse/HBASE-21700) | Simplify the implementation of RSGroupInfoManagerImpl |  Major | rsgroup |
| [HBASE-21694](https://issues.apache.org/jira/browse/HBASE-21694) | Add append\_peer\_exclude\_tableCFs and remove\_peer\_exclude\_tableCFs shell commands |  Major | . |
| [HBASE-21645](https://issues.apache.org/jira/browse/HBASE-21645) | Perform sanity check and disallow table creation/modification with region replication \< 1 |  Minor | . |
| [HBASE-21360](https://issues.apache.org/jira/browse/HBASE-21360) | Disable printing of stack-trace in shell for quotas |  Minor | shell |
| [HBASE-21662](https://issues.apache.org/jira/browse/HBASE-21662) | Add append\_peer\_exclude\_namespaces and remove\_peer\_exclude\_namespaces shell commands |  Major | . |
| [HBASE-21659](https://issues.apache.org/jira/browse/HBASE-21659) | Avoid to load duplicate coprocessors in system config and table descriptor |  Minor | . |
| [HBASE-21642](https://issues.apache.org/jira/browse/HBASE-21642) | CopyTable by reading snapshot and bulkloading will save a lot of time. |  Major | . |
| [HBASE-21643](https://issues.apache.org/jira/browse/HBASE-21643) | Introduce two new region coprocessor method and deprecated postMutationBeforeWAL |  Major | . |
| [HBASE-21640](https://issues.apache.org/jira/browse/HBASE-21640) | Remove the TODO when increment zero |  Major | . |
| [HBASE-21631](https://issues.apache.org/jira/browse/HBASE-21631) | list\_quotas should print human readable values for LIMIT |  Minor | shell |
| [HBASE-21635](https://issues.apache.org/jira/browse/HBASE-21635) | Use maven enforcer to ban imports from illegal packages |  Major | build |
| [HBASE-21514](https://issues.apache.org/jira/browse/HBASE-21514) | Refactor CacheConfig |  Major | . |
| [HBASE-21520](https://issues.apache.org/jira/browse/HBASE-21520) | TestMultiColumnScanner cost long time when using ROWCOL bloom type |  Major | test |
| [HBASE-21554](https://issues.apache.org/jira/browse/HBASE-21554) | Show replication endpoint classname for replication peer on master web UI |  Minor | UI |
| [HBASE-21549](https://issues.apache.org/jira/browse/HBASE-21549) | Add shell command for serial replication peer |  Major | . |
| [HBASE-21283](https://issues.apache.org/jira/browse/HBASE-21283) | Add new shell command 'rit' for listing regions in transition |  Minor | Operability, shell |
| [HBASE-21567](https://issues.apache.org/jira/browse/HBASE-21567) | Allow overriding configs starting up the shell |  Major | shell |
| [HBASE-21413](https://issues.apache.org/jira/browse/HBASE-21413) | Empty meta log doesn't get split when restart whole cluster |  Major | . |
| [HBASE-21524](https://issues.apache.org/jira/browse/HBASE-21524) | Unnecessary DEBUG log in ConnectionImplementation#isTableEnabled |  Major | Client |
| [HBASE-21511](https://issues.apache.org/jira/browse/HBASE-21511) | Remove in progress snapshot check in SnapshotFileCache#getUnreferencedFiles |  Minor | snapshots |
| [HBASE-21480](https://issues.apache.org/jira/browse/HBASE-21480) | Taking snapshot when RS crashes prevent we bring the regions online |  Major | snapshots |
| [HBASE-21485](https://issues.apache.org/jira/browse/HBASE-21485) | Add more debug logs for remote procedure execution |  Major | proc-v2 |
| [HBASE-21328](https://issues.apache.org/jira/browse/HBASE-21328) | add HBASE\_DISABLE\_HADOOP\_CLASSPATH\_LOOKUP switch to hbase-env.sh |  Minor | documentation, Operability |
| [HBASE-19682](https://issues.apache.org/jira/browse/HBASE-19682) | Use Collections.emptyList() For Empty List Values |  Minor | . |
| [HBASE-21388](https://issues.apache.org/jira/browse/HBASE-21388) | No need to instantiate MemStoreLAB for master which not carry table |  Major | . |
| [HBASE-21325](https://issues.apache.org/jira/browse/HBASE-21325) | Force to terminate regionserver when abort hang in somewhere |  Major | . |
| [HBASE-21385](https://issues.apache.org/jira/browse/HBASE-21385) | HTable.delete request use rpc call directly instead of AsyncProcess |  Major | . |
| [HBASE-21318](https://issues.apache.org/jira/browse/HBASE-21318) | Make RefreshHFilesClient runnable |  Minor | HFile |
| [HBASE-21263](https://issues.apache.org/jira/browse/HBASE-21263) | Mention compression algorithm along with other storefile details |  Minor | . |
| [HBASE-21290](https://issues.apache.org/jira/browse/HBASE-21290) | No need to instantiate BlockCache for master which not carry table |  Major | . |
| [HBASE-21256](https://issues.apache.org/jira/browse/HBASE-21256) | Improve IntegrationTestBigLinkedList for testing huge data |  Major | integration tests |
| [HBASE-21251](https://issues.apache.org/jira/browse/HBASE-21251) | Refactor RegionMover |  Major | Operability |
| [HBASE-21303](https://issues.apache.org/jira/browse/HBASE-21303) | [shell] clear\_deadservers with no args fails |  Major | . |
| [HBASE-21098](https://issues.apache.org/jira/browse/HBASE-21098) | Improve Snapshot Performance with Temporary Snapshot Directory when rootDir on S3 |  Major | . |
| [HBASE-21299](https://issues.apache.org/jira/browse/HBASE-21299) | List counts of actual region states in master UI tables section |  Major | UI |
| [HBASE-21289](https://issues.apache.org/jira/browse/HBASE-21289) | Remove the log "'hbase.regionserver.maxlogs' was deprecated." in AbstractFSWAL |  Minor | . |
| [HBASE-21185](https://issues.apache.org/jira/browse/HBASE-21185) | WALPrettyPrinter: Additional useful info to be printed by wal printer tool, for debugability purposes |  Minor | Operability |
| [HBASE-21103](https://issues.apache.org/jira/browse/HBASE-21103) | nightly test cache of yetus install needs to be more thorough in verification |  Major | test |
| [HBASE-21207](https://issues.apache.org/jira/browse/HBASE-21207) | Add client side sorting functionality in master web UI for table and region server details. |  Minor | master, monitoring, UI, Usability |
| [HBASE-20857](https://issues.apache.org/jira/browse/HBASE-20857) | JMX - add Balancer status = enabled / disabled |  Major | API, master, metrics, REST, tooling, Usability |
| [HBASE-21164](https://issues.apache.org/jira/browse/HBASE-21164) | reportForDuty to spew less log if master is initializing |  Minor | regionserver |
| [HBASE-21204](https://issues.apache.org/jira/browse/HBASE-21204) | NPE when scan raw DELETE\_FAMILY\_VERSION and codec is not set |  Major | . |
| [HBASE-20307](https://issues.apache.org/jira/browse/HBASE-20307) | LoadTestTool prints too much zookeeper logging |  Minor | tooling |
| [HBASE-21155](https://issues.apache.org/jira/browse/HBASE-21155) | Save on a few log strings and some churn in wal splitter by skipping out early if no logs in dir |  Trivial | . |
| [HBASE-21129](https://issues.apache.org/jira/browse/HBASE-21129) | Clean up duplicate codes in #equals and #hashCode methods of Filter |  Minor | Filters |
| [HBASE-21157](https://issues.apache.org/jira/browse/HBASE-21157) | Split TableInputFormatScan to individual tests |  Minor | test |
| [HBASE-21107](https://issues.apache.org/jira/browse/HBASE-21107) | add a metrics for netty direct memory |  Minor | IPC/RPC |
| [HBASE-21153](https://issues.apache.org/jira/browse/HBASE-21153) | Shaded client jars should always build in relevant phase to avoid confusion |  Major | build |
| [HBASE-21126](https://issues.apache.org/jira/browse/HBASE-21126) | Add ability for HBase Canary to ignore a configurable number of ZooKeeper down nodes |  Minor | canary, Zookeeper |
| [HBASE-20749](https://issues.apache.org/jira/browse/HBASE-20749) | Upgrade our use of checkstyle to 8.6+ |  Minor | build, community |
| [HBASE-21071](https://issues.apache.org/jira/browse/HBASE-21071) | HBaseTestingUtility::startMiniCluster() to use builder pattern |  Major | test |
| [HBASE-20387](https://issues.apache.org/jira/browse/HBASE-20387) | flaky infrastructure should work for all branches |  Critical | test |
| [HBASE-20469](https://issues.apache.org/jira/browse/HBASE-20469) | Directory used for sidelining old recovered edits files should be made configurable |  Minor | . |
| [HBASE-20979](https://issues.apache.org/jira/browse/HBASE-20979) | Flaky test reporting should specify what JSON it needs and handle HTTP errors |  Minor | test |
| [HBASE-20985](https://issues.apache.org/jira/browse/HBASE-20985) | add two attributes when we do normalization |  Major | . |
| [HBASE-20965](https://issues.apache.org/jira/browse/HBASE-20965) | Separate region server report requests to new handlers |  Major | Performance |
| [HBASE-20845](https://issues.apache.org/jira/browse/HBASE-20845) | Support set the consistency for Gets and Scans in thrift2 |  Major | Thrift |
| [HBASE-20986](https://issues.apache.org/jira/browse/HBASE-20986) | Separate the config of block size when we do log splitting and write Hlog |  Major | . |
| [HBASE-19036](https://issues.apache.org/jira/browse/HBASE-19036) | Add action in Chaos Monkey to restart Active Namenode |  Minor | . |
| [HBASE-20856](https://issues.apache.org/jira/browse/HBASE-20856) | PITA having to set WAL provider in two places |  Minor | Operability, wal |
| [HBASE-20935](https://issues.apache.org/jira/browse/HBASE-20935) | HStore.removeCompactedFiles should log in case it is unable to delete a file |  Minor | . |
| [HBASE-20873](https://issues.apache.org/jira/browse/HBASE-20873) | Update doc for Endpoint-based Export |  Minor | documentation |
| [HBASE-20672](https://issues.apache.org/jira/browse/HBASE-20672) | New metrics ReadRequestRate and WriteRequestRate |  Minor | metrics |
| [HBASE-20617](https://issues.apache.org/jira/browse/HBASE-20617) | Upgrade/remove jetty-jsp |  Minor | . |
| [HBASE-20396](https://issues.apache.org/jira/browse/HBASE-20396) | Remove redundant MBean from thrift JMX |  Major | Thrift |
| [HBASE-20357](https://issues.apache.org/jira/browse/HBASE-20357) | AccessControlClient API Enhancement |  Major | security |


### BUG FIXES:

| JIRA | Summary | Priority | Component |
|:---- |:---- | :--- |:---- |
| [HBASE-22563](https://issues.apache.org/jira/browse/HBASE-22563) | Reduce retained jobs for Jenkins pipelines |  Major | . |
| [HBASE-22552](https://issues.apache.org/jira/browse/HBASE-22552) | Rewrite TestEndToEndSplitTransaction.testCanSplitJustAfterASplit |  Major | test |
| [HBASE-22551](https://issues.apache.org/jira/browse/HBASE-22551) | TestMasterOperationsForRegionReplicas is flakey |  Major | read replicas, test |
| [HBASE-22481](https://issues.apache.org/jira/browse/HBASE-22481) | Javadoc Warnings: reference not found |  Trivial | documentation |
| [HBASE-22546](https://issues.apache.org/jira/browse/HBASE-22546) | TestRegionServerHostname#testRegionServerHostname fails reliably for me |  Major | . |
| [HBASE-22534](https://issues.apache.org/jira/browse/HBASE-22534) | TestCellUtil fails when run on JDK11 |  Minor | java, test |
| [HBASE-22536](https://issues.apache.org/jira/browse/HBASE-22536) | TestForeignExceptionSerialization fails when run on JDK11 |  Minor | java |
| [HBASE-22535](https://issues.apache.org/jira/browse/HBASE-22535) | TestShellRSGroups fails when run on JDK11 |  Minor | java, shell |
| [HBASE-22518](https://issues.apache.org/jira/browse/HBASE-22518) | yetus personality is treating branch-1.4 like earlier branches for hadoopcheck |  Major | test |
| [HBASE-22513](https://issues.apache.org/jira/browse/HBASE-22513) | Admin#getQuota does not work correctly if exceedThrottleQuota is set |  Major | Quotas |
| [HBASE-22522](https://issues.apache.org/jira/browse/HBASE-22522) | The integration test in master branch's nightly job has error "ERROR: Only found 1050 rows." |  Major | . |
| [HBASE-22490](https://issues.apache.org/jira/browse/HBASE-22490) | Nightly client integration test fails with hadoop-3 |  Major | build |
| [HBASE-22502](https://issues.apache.org/jira/browse/HBASE-22502) | Purge the logs when we reach the EOF for the last wal file when replication |  Major | . |
| [HBASE-22503](https://issues.apache.org/jira/browse/HBASE-22503) | Failed to upgrade to 2.2+ as the global permission which storaged in zk is not right |  Blocker | . |
| [HBASE-22487](https://issues.apache.org/jira/browse/HBASE-22487) | getMostLoadedRegions is unused |  Trivial | regionserver |
| [HBASE-22485](https://issues.apache.org/jira/browse/HBASE-22485) | Fix failed ut TestClusterRestartFailover |  Major | . |
| [HBASE-22486](https://issues.apache.org/jira/browse/HBASE-22486) | Fix flaky test TestLockManager |  Major | . |
| [HBASE-22471](https://issues.apache.org/jira/browse/HBASE-22471) | Our nightly jobs for master and branch-2 are still using hadoop-2.7.1 in integration test |  Major | build |
| [HBASE-22003](https://issues.apache.org/jira/browse/HBASE-22003) | Fix flaky test TestVerifyReplication.testHBase14905 |  Major | . |
| [HBASE-22441](https://issues.apache.org/jira/browse/HBASE-22441) | BucketCache NullPointerException in cacheBlock |  Major | BucketCache |
| [HBASE-22473](https://issues.apache.org/jira/browse/HBASE-22473) | Split TestSCP |  Major | Recovery, test |
| [HBASE-22456](https://issues.apache.org/jira/browse/HBASE-22456) | Polish TestSplitTransitionOnCluster |  Major | test |
| [HBASE-21800](https://issues.apache.org/jira/browse/HBASE-21800) | RegionServer aborted due to NPE from MetaTableMetrics coprocessor |  Critical | Coprocessors, meta, metrics, Operability |
| [HBASE-22462](https://issues.apache.org/jira/browse/HBASE-22462) | Should run a 'mvn install' at the end of hadoop check in pre commit job |  Major | build |
| [HBASE-22440](https://issues.apache.org/jira/browse/HBASE-22440) | HRegionServer#getWalGroupsReplicationStatus() throws NPE |  Major | regionserver, Replication |
| [HBASE-22226](https://issues.apache.org/jira/browse/HBASE-22226) | Incorrect level for headings in asciidoc |  Trivial | documentation |
| [HBASE-22442](https://issues.apache.org/jira/browse/HBASE-22442) | Nightly build is failing with hadoop 3.x |  Major | build, hadoop3 |
| [HBASE-20970](https://issues.apache.org/jira/browse/HBASE-20970) | Update hadoop check versions for hadoop3 in hbase-personality |  Major | build |
| [HBASE-22424](https://issues.apache.org/jira/browse/HBASE-22424) | Interactions in RSGroup test classes will cause TestRSGroupsAdmin2.testMoveServersAndTables and TestRSGroupsBalance.testGroupBalance flaky |  Major | rsgroup |
| [HBASE-22404](https://issues.apache.org/jira/browse/HBASE-22404) | Open/Close region request may be executed twice when master restart |  Major | . |
| [HBASE-22274](https://issues.apache.org/jira/browse/HBASE-22274) | Cell size limit check on append should consider cell's previous size. |  Minor | . |
| [HBASE-22072](https://issues.apache.org/jira/browse/HBASE-22072) | High read/write intensive regions may cause long crash recovery |  Major | Performance, Recovery |
| [HBASE-22324](https://issues.apache.org/jira/browse/HBASE-22324) |  loss a mass of data when the sequenceId of cells greater than Integer.Max, because MemStoreMergerSegmentsIterator can not merge segments |  Blocker | in-memory-compaction |
| [HBASE-21777](https://issues.apache.org/jira/browse/HBASE-21777) | "Tune compaction throughput" debug messages even when nothing has changed |  Trivial | Compaction |
| [HBASE-22360](https://issues.apache.org/jira/browse/HBASE-22360) | Abort timer doesn't set when abort is called during graceful shutdown process |  Major | regionserver |
| [HBASE-20851](https://issues.apache.org/jira/browse/HBASE-20851) | Change rubocop config for max line length of 100 |  Minor | community, shell |
| [HBASE-21467](https://issues.apache.org/jira/browse/HBASE-21467) | Fix flaky test TestCoprocessorClassLoader.testCleanupOldJars |  Minor | . |
| [HBASE-22312](https://issues.apache.org/jira/browse/HBASE-22312) | Hadoop 3 profile for hbase-shaded-mapreduce should like mapreduce as a provided dependency |  Major | mapreduce, shading |
| [HBASE-22314](https://issues.apache.org/jira/browse/HBASE-22314) | shaded byo-hadoop client should list needed hadoop modules as provided scope to avoid inclusion of unnecessary transitive depednencies |  Major | hadoop2, hadoop3, shading |
| [HBASE-22047](https://issues.apache.org/jira/browse/HBASE-22047) | LeaseException in Scan should be retired |  Major | Client, Scanners |
| [HBASE-22343](https://issues.apache.org/jira/browse/HBASE-22343) | Make procedure retry interval configurable in test |  Major | amv2, test |
| [HBASE-22190](https://issues.apache.org/jira/browse/HBASE-22190) | SnapshotFileCache may fail to load the correct snapshot file list when there is an on-going snapshot operation |  Blocker | snapshots |
| [HBASE-22354](https://issues.apache.org/jira/browse/HBASE-22354) | master never sets abortRequested, and thus abort timeout doesn't work for it |  Major | . |
| [HBASE-22350](https://issues.apache.org/jira/browse/HBASE-22350) | Rewrite TestClientOperationTimeout so we do not timeout when creating table |  Major | test |
| [HBASE-22340](https://issues.apache.org/jira/browse/HBASE-22340) | Corrupt KeyValue is silently ignored |  Critical | wal |
| [HBASE-22054](https://issues.apache.org/jira/browse/HBASE-22054) | Space Quota: Compaction is not working for super user in case of NO\_WRITES\_COMPACTIONS |  Minor | . |
| [HBASE-22236](https://issues.apache.org/jira/browse/HBASE-22236) | AsyncNonMetaRegionLocator should not cache HRegionLocation with null location |  Major | asyncclient |
| [HBASE-22086](https://issues.apache.org/jira/browse/HBASE-22086) | space quota issue: deleting snapshot doesn't update the usage of table |  Minor | . |
| [HBASE-22298](https://issues.apache.org/jira/browse/HBASE-22298) | branch-2.2 nightly fails "[ForOverride] Method annotated @ForOverride must have protected or package-private visibility" |  Major | . |
| [HBASE-22292](https://issues.apache.org/jira/browse/HBASE-22292) | PreemptiveFastFailInterceptor clean repeatedFailuresMap issue |  Blocker | . |
| [HBASE-22230](https://issues.apache.org/jira/browse/HBASE-22230) | REST Server drops connection on long scans |  Major | . |
| [HBASE-22200](https://issues.apache.org/jira/browse/HBASE-22200) | WALSplitter.hasRecoveredEdits should use same FS instance from WAL region dir |  Major | wal |
| [HBASE-22286](https://issues.apache.org/jira/browse/HBASE-22286) | License handling incorrectly lists CDDL/GPLv2+CE as safe to not aggregate |  Critical | build, community |
| [HBASE-22282](https://issues.apache.org/jira/browse/HBASE-22282) | Should deal with error in the callback of RawAsyncHBaseAdmin.splitRegion methods |  Major | Admin, asyncclient |
| [HBASE-22278](https://issues.apache.org/jira/browse/HBASE-22278) | RawAsyncHBaseAdmin should not use cached region location |  Major | Admin, asyncclient |
| [HBASE-22222](https://issues.apache.org/jira/browse/HBASE-22222) | Site build fails after hbase-thirdparty upgrade |  Blocker | website |
| [HBASE-22249](https://issues.apache.org/jira/browse/HBASE-22249) | Rest Server throws NoClassDefFoundError with Java 11 (run-time) |  Major | . |
| [HBASE-22235](https://issues.apache.org/jira/browse/HBASE-22235) | OperationStatus.{SUCCESS\|FAILURE\|NOT\_RUN} are not visible to 3rd party coprocessors |  Major | Coprocessors |
| [HBASE-22207](https://issues.apache.org/jira/browse/HBASE-22207) | Fix flakey TestAssignmentManager.testAssignSocketTimeout |  Major | test |
| [HBASE-22202](https://issues.apache.org/jira/browse/HBASE-22202) | Fix new findbugs issues after we upgrade hbase-thirdparty dependencies |  Major | findbugs |
| [HBASE-22144](https://issues.apache.org/jira/browse/HBASE-22144) | MultiRowRangeFilter does not work with reversed scans |  Critical | Filters, Scanners |
| [HBASE-22198](https://issues.apache.org/jira/browse/HBASE-22198) | Fix flakey TestAsyncTableGetMultiThreaded |  Major | test |
| [HBASE-22185](https://issues.apache.org/jira/browse/HBASE-22185) | RAMQueueEntry#writeToCache should freeBlock if any exception encountered instead of the IOException catch block |  Major | . |
| [HBASE-22163](https://issues.apache.org/jira/browse/HBASE-22163) | Should not archive the compacted store files when region warmup |  Blocker | . |
| [HBASE-22178](https://issues.apache.org/jira/browse/HBASE-22178) | Introduce a createTableAsync with TableDescriptor method in Admin |  Major | Admin |
| [HBASE-22180](https://issues.apache.org/jira/browse/HBASE-22180) | Make TestBlockEvictionFromClient.testBlockRefCountAfterSplits more stable |  Major | test |
| [HBASE-22179](https://issues.apache.org/jira/browse/HBASE-22179) | Fix RawAsyncHBaseAdmin.getCompactionState |  Major | Admin, asyncclient |
| [HBASE-22177](https://issues.apache.org/jira/browse/HBASE-22177) | Do not recreate IOException in RawAsyncHBaseAdmin.adminCall |  Major | Admin, asyncclient |
| [HBASE-22070](https://issues.apache.org/jira/browse/HBASE-22070) | Checking restoreDir in RestoreSnapshotHelper |  Minor | snapshots |
| [HBASE-20912](https://issues.apache.org/jira/browse/HBASE-20912) | Add import order config in dev support for eclipse |  Major | . |
| [HBASE-22133](https://issues.apache.org/jira/browse/HBASE-22133) | Forward port HBASE-22073 "/rits.jsp throws an exception if no procedure" to branch-2.2+ |  Major | UI |
| [HBASE-20911](https://issues.apache.org/jira/browse/HBASE-20911) | correct Swtich/case indentation in formatter template for eclipse |  Major | . |
| [HBASE-21688](https://issues.apache.org/jira/browse/HBASE-21688) | Address WAL filesystem issues |  Major | Filesystem Integration, wal |
| [HBASE-22121](https://issues.apache.org/jira/browse/HBASE-22121) | AsyncAdmin can not deal with non default meta replica |  Major | Admin, asyncclient, Client |
| [HBASE-22115](https://issues.apache.org/jira/browse/HBASE-22115) | HBase RPC aspires to grow an infinite tree of trace scopes; some other places are also unsafe |  Critical | . |
| [HBASE-22123](https://issues.apache.org/jira/browse/HBASE-22123) | REST gateway reports Insufficient permissions exceptions as 404 Not Found |  Minor | REST |
| [HBASE-21135](https://issues.apache.org/jira/browse/HBASE-21135) | Build fails on windows as it fails to parse windows path during license check |  Major | build |
| [HBASE-21781](https://issues.apache.org/jira/browse/HBASE-21781) | list\_deadservers elapsed time is incorrect |  Major | shell |
| [HBASE-22100](https://issues.apache.org/jira/browse/HBASE-22100) | False positive for error prone warnings in pre commit job |  Minor | build |
| [HBASE-22098](https://issues.apache.org/jira/browse/HBASE-22098) | Backport HBASE-18667 "Disable error-prone for hbase-protocol-shaded" to branch-2 |  Major | build |
| [HBASE-20662](https://issues.apache.org/jira/browse/HBASE-20662) | Increasing space quota on a violated table does not remove SpaceViolationPolicy.DISABLE enforcement |  Major | . |
| [HBASE-22057](https://issues.apache.org/jira/browse/HBASE-22057) | Impose upper-bound on size of ZK ops sent in a single multi() |  Major | . |
| [HBASE-22074](https://issues.apache.org/jira/browse/HBASE-22074) | Should use procedure store to persist the state in reportRegionStateTransition |  Blocker | amv2, proc-v2 |
| [HBASE-21619](https://issues.apache.org/jira/browse/HBASE-21619) | Fix warning message caused by incorrect ternary operator evaluation |  Trivial | . |
| [HBASE-22095](https://issues.apache.org/jira/browse/HBASE-22095) | Taking a snapshot fails in local mode |  Major | . |
| [HBASE-22061](https://issues.apache.org/jira/browse/HBASE-22061) | SplitTableRegionProcedure should hold the lock of its daughter regions |  Major | . |
| [HBASE-22045](https://issues.apache.org/jira/browse/HBASE-22045) | Mutable range histogram reports incorrect outliers |  Major | . |
| [HBASE-21736](https://issues.apache.org/jira/browse/HBASE-21736) | Remove the server from online servers before scheduling SCP for it in hbck |  Major | hbck2, test |
| [HBASE-22011](https://issues.apache.org/jira/browse/HBASE-22011) | ThriftUtilities.getFromThrift should set filter when not set columns |  Major | . |
| [HBASE-21990](https://issues.apache.org/jira/browse/HBASE-21990) | puppycrawl checkstyle dtds 404... moved to sourceforge |  Major | build |
| [HBASE-22010](https://issues.apache.org/jira/browse/HBASE-22010) | docs on upgrade from 2.0,2.1 -\> 2.2 renders incorrectly |  Minor | documentation |
| [HBASE-22006](https://issues.apache.org/jira/browse/HBASE-22006) | Fix branch-2.1 findbugs warning; causes nightly show as failed. |  Major | . |
| [HBASE-21960](https://issues.apache.org/jira/browse/HBASE-21960) | RESTServletContainer not configured for REST Jetty server |  Blocker | REST |
| [HBASE-21915](https://issues.apache.org/jira/browse/HBASE-21915) | FileLink$FileLinkInputStream doesn't implement CanUnbuffer |  Major | Filesystem Integration |
| [HBASE-21565](https://issues.apache.org/jira/browse/HBASE-21565) | Delete dead server from dead server list too early leads to concurrent Server Crash Procedures(SCP) for a same server |  Critical | . |
| [HBASE-21740](https://issues.apache.org/jira/browse/HBASE-21740) | NPE happens while shutdown the RS |  Major | . |
| [HBASE-21866](https://issues.apache.org/jira/browse/HBASE-21866) | Do not move the table to null rsgroup when creating an existing table |  Major | proc-v2, rsgroup |
| [HBASE-21983](https://issues.apache.org/jira/browse/HBASE-21983) | Should track the scan metrics in AsyncScanSingleRegionRpcRetryingCaller if scan metrics is enabled |  Major | asyncclient, Client |
| [HBASE-21980](https://issues.apache.org/jira/browse/HBASE-21980) | Fix typo in AbstractTestAsyncTableRegionReplicasRead |  Major | test |
| [HBASE-21487](https://issues.apache.org/jira/browse/HBASE-21487) | Concurrent modify table ops can lead to unexpected results |  Major | . |
| [HBASE-20724](https://issues.apache.org/jira/browse/HBASE-20724) | Sometimes some compacted storefiles are still opened after region failover |  Critical | . |
| [HBASE-21961](https://issues.apache.org/jira/browse/HBASE-21961) | Infinite loop in AsyncNonMetaRegionLocator if there is only one region and we tried to locate before a non empty row |  Critical | asyncclient, Client |
| [HBASE-21943](https://issues.apache.org/jira/browse/HBASE-21943) | The usage of RegionLocations.mergeRegionLocations is wrong for async client |  Critical | asyncclient, Client |
| [HBASE-21947](https://issues.apache.org/jira/browse/HBASE-21947) | TestShell is broken after we remove the jackson dependencies |  Major | dependencies, shell |
| [HBASE-21942](https://issues.apache.org/jira/browse/HBASE-21942) | [UI] requests per second is incorrect in rsgroup page(rsgroup.jsp) |  Minor | . |
| [HBASE-21922](https://issues.apache.org/jira/browse/HBASE-21922) | BloomContext#sanityCheck may failed when use ROWPREFIX\_DELIMITED bloom filter |  Major | . |
| [HBASE-21929](https://issues.apache.org/jira/browse/HBASE-21929) | The checks at the end of TestRpcClientLeaks are not executed |  Major | test |
| [HBASE-21938](https://issues.apache.org/jira/browse/HBASE-21938) | Add a new ClusterMetrics.Option SERVERS\_NAME to only return the live region servers's name without metrics |  Major | . |
| [HBASE-21928](https://issues.apache.org/jira/browse/HBASE-21928) | Deprecated HConstants.META\_QOS |  Major | Client, rpc |
| [HBASE-21899](https://issues.apache.org/jira/browse/HBASE-21899) | Fix missing variables in slf4j Logger |  Trivial | logging |
| [HBASE-21910](https://issues.apache.org/jira/browse/HBASE-21910) | The nonce implementation is wrong for AsyncTable |  Critical | asyncclient, Client |
| [HBASE-21900](https://issues.apache.org/jira/browse/HBASE-21900) | Infinite loop in AsyncMetaRegionLocator if we can not get the location for meta |  Major | asyncclient, Client |
| [HBASE-21890](https://issues.apache.org/jira/browse/HBASE-21890) | Use execute instead of submit to submit a task in RemoteProcedureDispatcher |  Critical | proc-v2 |
| [HBASE-21889](https://issues.apache.org/jira/browse/HBASE-21889) | Use thrift 0.12.0 when build thrift by compile-thrift profile |  Major | . |
| [HBASE-21785](https://issues.apache.org/jira/browse/HBASE-21785) | master reports open regions as RITs and also messes up rit age metric |  Major | . |
| [HBASE-21854](https://issues.apache.org/jira/browse/HBASE-21854) | Race condition in TestProcedureSkipPersistence |  Minor | proc-v2 |
| [HBASE-21862](https://issues.apache.org/jira/browse/HBASE-21862) | IPCUtil.wrapException should keep the original exception types for all the connection exceptions |  Blocker | . |
| [HBASE-18484](https://issues.apache.org/jira/browse/HBASE-18484) | VerifyRep by snapshot  does not work when Yarn / SourceHBase / PeerHBase located in different HDFS clusters |  Major | Replication |
| [HBASE-21775](https://issues.apache.org/jira/browse/HBASE-21775) | The BufferedMutator doesn't ever refresh region location cache |  Major | Client |
| [HBASE-21843](https://issues.apache.org/jira/browse/HBASE-21843) | RegionGroupingProvider breaks the meta wal file name pattern which may cause data loss for meta region |  Blocker | wal |
| [HBASE-21795](https://issues.apache.org/jira/browse/HBASE-21795) | Client application may get stuck (time bound) if a table modify op is called immediately after split op |  Critical | amv2 |
| [HBASE-21840](https://issues.apache.org/jira/browse/HBASE-21840) | TestHRegionWithInMemoryFlush fails with NPE |  Blocker | test |
| [HBASE-21811](https://issues.apache.org/jira/browse/HBASE-21811) | region can be opened on two servers due to race condition with procedures and server reports |  Blocker | amv2 |
| [HBASE-21644](https://issues.apache.org/jira/browse/HBASE-21644) | Modify table procedure runs infinitely for a table having region replication \> 1 |  Critical | Admin |
| [HBASE-21733](https://issues.apache.org/jira/browse/HBASE-21733) | SnapshotQuotaObserverChore should only fetch space quotas |  Major | . |
| [HBASE-21699](https://issues.apache.org/jira/browse/HBASE-21699) | Create table failed when using  SPLITS\_FILE =\> 'splits.txt' |  Blocker | Client, shell |
| [HBASE-21535](https://issues.apache.org/jira/browse/HBASE-21535) | Zombie Master detector is not working |  Critical | master |
| [HBASE-21770](https://issues.apache.org/jira/browse/HBASE-21770) | Should deal with meta table in HRegionLocator.getAllRegionLocations |  Major | Client |
| [HBASE-21754](https://issues.apache.org/jira/browse/HBASE-21754) | ReportRegionStateTransitionRequest should be executed in priority executor |  Major | . |
| [HBASE-21475](https://issues.apache.org/jira/browse/HBASE-21475) | Put mutation (having TTL set) added via co-processor is retrieved even after TTL expires |  Major | Coprocessors |
| [HBASE-21749](https://issues.apache.org/jira/browse/HBASE-21749) | RS UI may throw NPE and make rs-status page inaccessible with multiwal and replication |  Major | Replication, UI |
| [HBASE-21746](https://issues.apache.org/jira/browse/HBASE-21746) | Fix two concern cases in RegionMover |  Major | . |
| [HBASE-21732](https://issues.apache.org/jira/browse/HBASE-21732) | Should call toUpperCase before using Enum.valueOf in some methods for ColumnFamilyDescriptor |  Critical | Client |
| [HBASE-21704](https://issues.apache.org/jira/browse/HBASE-21704) | The implementation of DistributedHBaseCluster.getServerHoldingRegion is incorrect |  Major | . |
| [HBASE-20917](https://issues.apache.org/jira/browse/HBASE-20917) | MetaTableMetrics#stop references uninitialized requestsMap for non-meta region |  Major | meta, metrics |
| [HBASE-21639](https://issues.apache.org/jira/browse/HBASE-21639) | maxHeapUsage value not read properly from config during EntryBuffers initialization |  Minor | . |
| [HBASE-21225](https://issues.apache.org/jira/browse/HBASE-21225) | Having RPC & Space quota on a table/Namespace doesn't allow space quota to be removed using 'NONE' |  Major | . |
| [HBASE-21707](https://issues.apache.org/jira/browse/HBASE-21707) | Fix warnings in hbase-rsgroup module and also make the UTs more stable |  Major | Region Assignment, rsgroup |
| [HBASE-20220](https://issues.apache.org/jira/browse/HBASE-20220) | [RSGroup] Check if table exists in the cluster before moving it to the specified regionserver group |  Major | rsgroup |
| [HBASE-21691](https://issues.apache.org/jira/browse/HBASE-21691) | Fix flaky test TestRecoveredEdits |  Major | . |
| [HBASE-21695](https://issues.apache.org/jira/browse/HBASE-21695) | Fix flaky test TestRegionServerAbortTimeout |  Major | . |
| [HBASE-21614](https://issues.apache.org/jira/browse/HBASE-21614) | RIT recovery with ServerCrashProcedure doesn't account for all regions |  Critical | amv2 |
| [HBASE-21618](https://issues.apache.org/jira/browse/HBASE-21618) | Scan with the same startRow(inclusive=true) and stopRow(inclusive=false) returns one result |  Critical | Client |
| [HBASE-21683](https://issues.apache.org/jira/browse/HBASE-21683) | Reset readsEnabled flag after successfully flushing the primary region |  Critical | read replicas |
| [HBASE-21630](https://issues.apache.org/jira/browse/HBASE-21630) | [shell] Define ENDKEY == STOPROW (we have ENDROW) |  Trivial | shell |
| [HBASE-21547](https://issues.apache.org/jira/browse/HBASE-21547) | Precommit uses master flaky list for other branches |  Major | test |
| [HBASE-21660](https://issues.apache.org/jira/browse/HBASE-21660) | Apply the cell to right memstore for increment/append operation |  Major | . |
| [HBASE-21646](https://issues.apache.org/jira/browse/HBASE-21646) | Flakey TestTableSnapshotInputFormat; DisableTable not completing... |  Major | test |
| [HBASE-21545](https://issues.apache.org/jira/browse/HBASE-21545) | NEW\_VERSION\_BEHAVIOR breaks Get/Scan with specified columns |  Major | API |
| [HBASE-21629](https://issues.apache.org/jira/browse/HBASE-21629) | draining\_servers.rb is broken |  Major | scripts |
| [HBASE-21621](https://issues.apache.org/jira/browse/HBASE-21621) | Reversed scan does not return expected  number of rows |  Critical | Scanners |
| [HBASE-21620](https://issues.apache.org/jira/browse/HBASE-21620) | Problem in scan query when using more than one column prefix filter in some cases. |  Major | Scanners |
| [HBASE-21610](https://issues.apache.org/jira/browse/HBASE-21610) | numOpenConnections metric is set to -1 when zero server channel exist |  Minor | metrics |
| [HBASE-21498](https://issues.apache.org/jira/browse/HBASE-21498) | Master OOM when SplitTableRegionProcedure new CacheConfig and instantiate a new BlockCache |  Major | . |
| [HBASE-21592](https://issues.apache.org/jira/browse/HBASE-21592) | quota.addGetResult(r)  throw  NPE |  Major | . |
| [HBASE-21589](https://issues.apache.org/jira/browse/HBASE-21589) | TestCleanupMetaWAL fails |  Blocker | test, wal |
| [HBASE-21575](https://issues.apache.org/jira/browse/HBASE-21575) | memstore above high watermark message is logged too much |  Minor | logging, regionserver |
| [HBASE-21582](https://issues.apache.org/jira/browse/HBASE-21582) | If call HBaseAdmin#snapshotAsync but forget call isSnapshotFinished, then SnapshotHFileCleaner will skip to run every time |  Major | . |
| [HBASE-21568](https://issues.apache.org/jira/browse/HBASE-21568) | Disable use of BlockCache for LoadIncrementalHFiles |  Major | Client |
| [HBASE-21453](https://issues.apache.org/jira/browse/HBASE-21453) | Convert ReadOnlyZKClient to DEBUG instead of INFO |  Major | logging, Zookeeper |
| [HBASE-21559](https://issues.apache.org/jira/browse/HBASE-21559) | The RestoreSnapshotFromClientTestBase related UT are flaky |  Major | . |
| [HBASE-21551](https://issues.apache.org/jira/browse/HBASE-21551) | Memory leak when use scan with STREAM at server side |  Blocker | regionserver |
| [HBASE-21550](https://issues.apache.org/jira/browse/HBASE-21550) | Add a new method preCreateTableRegionInfos for MasterObserver which allows CPs to modify the TableDescriptor |  Major | Coprocessors |
| [HBASE-21479](https://issues.apache.org/jira/browse/HBASE-21479) | Individual tests in TestHRegionReplayEvents class are failing |  Major | . |
| [HBASE-21518](https://issues.apache.org/jira/browse/HBASE-21518) | TestMasterFailoverWithProcedures is flaky |  Major | . |
| [HBASE-21504](https://issues.apache.org/jira/browse/HBASE-21504) | If enable FIFOCompactionPolicy, a compaction may write a "empty" hfile whose maxTimeStamp is long max. This kind of hfile will never be archived. |  Critical | Compaction |
| [HBASE-21300](https://issues.apache.org/jira/browse/HBASE-21300) | Fix the wrong reference file path when restoring snapshots for tables with MOB columns |  Major | . |
| [HBASE-21507](https://issues.apache.org/jira/browse/HBASE-21507) | Compaction failed when execute AbstractMultiFileWriter.beforeShipped() method |  Major | Compaction, regionserver |
| [HBASE-21387](https://issues.apache.org/jira/browse/HBASE-21387) | Race condition surrounding in progress snapshot handling in snapshot cache leads to loss of snapshot files |  Major | snapshots |
| [HBASE-21503](https://issues.apache.org/jira/browse/HBASE-21503) | Replication normal source can get stuck due potential race conditions between source wal reader and wal provider initialization threads. |  Blocker | Replication |
| [HBASE-21466](https://issues.apache.org/jira/browse/HBASE-21466) | WALProcedureStore uses wrong FileSystem if wal.dir is not under rootdir |  Major | . |
| [HBASE-21445](https://issues.apache.org/jira/browse/HBASE-21445) | CopyTable by bulkload will write hfile into yarn's HDFS |  Major | mapreduce |
| [HBASE-21437](https://issues.apache.org/jira/browse/HBASE-21437) | Bypassed procedure throw IllegalArgumentException when its state is WAITING\_TIMEOUT |  Major | . |
| [HBASE-21439](https://issues.apache.org/jira/browse/HBASE-21439) | StochasticLoadBalancer RegionLoads aren’t being used in RegionLoad cost functions |  Major | Balancer |
| [HBASE-20604](https://issues.apache.org/jira/browse/HBASE-20604) | ProtobufLogReader#readNext can incorrectly loop to the same position in the stream until the the WAL is rolled |  Critical | Replication, wal |
| [HBASE-21247](https://issues.apache.org/jira/browse/HBASE-21247) | Custom Meta WAL Provider doesn't default to custom WAL Provider whose configuration value is outside the enums in Providers |  Major | wal |
| [HBASE-21430](https://issues.apache.org/jira/browse/HBASE-21430) | [hbase-connectors] Move hbase-spark\* modules to hbase-connectors repo |  Major | hbase-connectors, spark |
| [HBASE-21438](https://issues.apache.org/jira/browse/HBASE-21438) | TestAdmin2#testGetProcedures fails due to FailedProcedure inaccessible |  Major | . |
| [HBASE-21425](https://issues.apache.org/jira/browse/HBASE-21425) | 2.1.1 fails to start over 1.x data; namespace not assigned |  Critical | amv2 |
| [HBASE-21407](https://issues.apache.org/jira/browse/HBASE-21407) | Resolve NPE in backup Master UI |  Minor | UI |
| [HBASE-21422](https://issues.apache.org/jira/browse/HBASE-21422) | NPE in TestMergeTableRegionsProcedure.testMergeWithoutPONR |  Major | proc-v2, test |
| [HBASE-21424](https://issues.apache.org/jira/browse/HBASE-21424) | Change flakies and nightlies so scheduled less often |  Major | build |
| [HBASE-21417](https://issues.apache.org/jira/browse/HBASE-21417) | Pre commit build is broken due to surefire plugin crashes |  Critical | build |
| [HBASE-21371](https://issues.apache.org/jira/browse/HBASE-21371) | Hbase unable to compile against Hadoop trunk (3.3.0-SNAPSHOT) due to license error |  Major | . |
| [HBASE-21391](https://issues.apache.org/jira/browse/HBASE-21391) | RefreshPeerProcedure should also wait master initialized before executing |  Major | Replication |
| [HBASE-21342](https://issues.apache.org/jira/browse/HBASE-21342) | FileSystem in use may get closed by other bulk load call  in secure bulkLoad |  Major | . |
| [HBASE-21349](https://issues.apache.org/jira/browse/HBASE-21349) | Cluster is going down but CatalogJanitor and Normalizer try to run and fail noisely |  Minor | . |
| [HBASE-21356](https://issues.apache.org/jira/browse/HBASE-21356) | bulkLoadHFile API should ensure that rs has the source hfile's write permission |  Major | . |
| [HBASE-21355](https://issues.apache.org/jira/browse/HBASE-21355) | HStore's storeSize is calculated repeatedly which causing the confusing region split |  Blocker | regionserver |
| [HBASE-21334](https://issues.apache.org/jira/browse/HBASE-21334) | TestMergeTableRegionsProcedure is flakey |  Major | amv2, proc-v2, test |
| [HBASE-21178](https://issues.apache.org/jira/browse/HBASE-21178) | [BC break] : Get and Scan operation with a custom converter\_class not working |  Critical | shell |
| [HBASE-21200](https://issues.apache.org/jira/browse/HBASE-21200) | Memstore flush doesn't finish because of seekToPreviousRow() in memstore scanner. |  Critical | Scanners |
| [HBASE-21292](https://issues.apache.org/jira/browse/HBASE-21292) | IdLock.getLockEntry() may hang if interrupted |  Major | . |
| [HBASE-21335](https://issues.apache.org/jira/browse/HBASE-21335) | Change the default wait time of HBCK2 tool |  Critical | . |
| [HBASE-21291](https://issues.apache.org/jira/browse/HBASE-21291) | Add a test for bypassing stuck state-machine procedures |  Major | . |
| [HBASE-21055](https://issues.apache.org/jira/browse/HBASE-21055) | NullPointerException when balanceOverall() but server balance info is null |  Major | Balancer |
| [HBASE-21327](https://issues.apache.org/jira/browse/HBASE-21327) | Fix minor logging issue where we don't report servername if no associated SCP |  Trivial | amv2 |
| [HBASE-21320](https://issues.apache.org/jira/browse/HBASE-21320) | [canary] Cleanup of usage and add commentary |  Major | canary |
| [HBASE-21266](https://issues.apache.org/jira/browse/HBASE-21266) | Not running balancer because processing dead regionservers, but empty dead rs list |  Major | . |
| [HBASE-21260](https://issues.apache.org/jira/browse/HBASE-21260) | The whole balancer plans might be aborted if there are more than one plans to move a same region |  Major | Balancer, master |
| [HBASE-21280](https://issues.apache.org/jira/browse/HBASE-21280) | Add anchors for each heading in UI |  Trivial | UI, Usability |
| [HBASE-20764](https://issues.apache.org/jira/browse/HBASE-20764) | build broken when latest commit is gpg signed |  Critical | build |
| [HBASE-18549](https://issues.apache.org/jira/browse/HBASE-18549) | Unclaimed replication queues can go undetected |  Critical | Replication |
| [HBASE-21248](https://issues.apache.org/jira/browse/HBASE-21248) | Implement exponential backoff when retrying for ModifyPeerProcedure |  Major | proc-v2, Replication |
| [HBASE-21196](https://issues.apache.org/jira/browse/HBASE-21196) | HTableMultiplexer clears the meta cache after every put operation |  Critical | Performance |
| [HBASE-19418](https://issues.apache.org/jira/browse/HBASE-19418) | RANGE\_OF\_DELAY in PeriodicMemstoreFlusher should be configurable. |  Minor | . |
| [HBASE-18451](https://issues.apache.org/jira/browse/HBASE-18451) | PeriodicMemstoreFlusher should inspect the queue before adding a delayed flush request |  Major | regionserver |
| [HBASE-21228](https://issues.apache.org/jira/browse/HBASE-21228) | Memory leak since AbstractFSWAL caches Thread object and never clean later |  Critical | wal |
| [HBASE-20766](https://issues.apache.org/jira/browse/HBASE-20766) | Verify Replication Tool Has Typo "remove cluster" |  Trivial | . |
| [HBASE-21232](https://issues.apache.org/jira/browse/HBASE-21232) | Show table state in Tables view on Master home page |  Major | Operability, UI |
| [HBASE-21212](https://issues.apache.org/jira/browse/HBASE-21212) | Wrong flush time when update flush metric |  Minor | . |
| [HBASE-21208](https://issues.apache.org/jira/browse/HBASE-21208) | Bytes#toShort doesn't work without unsafe |  Critical | . |
| [HBASE-20704](https://issues.apache.org/jira/browse/HBASE-20704) | Sometimes some compacted storefiles are not archived on region close |  Critical | Compaction |
| [HBASE-21203](https://issues.apache.org/jira/browse/HBASE-21203) | TestZKMainServer#testCommandLineWorks won't pass with default 4lw whitelist |  Minor | test, Zookeeper |
| [HBASE-21102](https://issues.apache.org/jira/browse/HBASE-21102) | ServerCrashProcedure should select target server where no other replicas exist for the current region |  Major | Region Assignment |
| [HBASE-21206](https://issues.apache.org/jira/browse/HBASE-21206) | Scan with batch size may return incomplete cells |  Critical | Scanners |
| [HBASE-21182](https://issues.apache.org/jira/browse/HBASE-21182) | Failed to execute start-hbase.sh |  Major | . |
| [HBASE-21179](https://issues.apache.org/jira/browse/HBASE-21179) | Fix the number of actions in responseTooSlow log |  Major | logging, rpc |
| [HBASE-21174](https://issues.apache.org/jira/browse/HBASE-21174) | [REST] Failed to parse empty qualifier in TableResource#getScanResource |  Major | REST |
| [HBASE-21181](https://issues.apache.org/jira/browse/HBASE-21181) | Use the same filesystem for wal archive directory and wal directory |  Major | . |
| [HBASE-21021](https://issues.apache.org/jira/browse/HBASE-21021) | Result returned by Append operation should be ordered |  Major | . |
| [HBASE-21173](https://issues.apache.org/jira/browse/HBASE-21173) | Remove the duplicate HRegion#close in TestHRegion |  Minor | test |
| [HBASE-21144](https://issues.apache.org/jira/browse/HBASE-21144) | AssignmentManager.waitForAssignment is not stable |  Major | amv2, test |
| [HBASE-21143](https://issues.apache.org/jira/browse/HBASE-21143) | Update findbugs-maven-plugin to 3.0.4 |  Major | pom |
| [HBASE-21171](https://issues.apache.org/jira/browse/HBASE-21171) | [amv2] Tool to parse a directory of MasterProcWALs standalone |  Major | amv2, test |
| [HBASE-21052](https://issues.apache.org/jira/browse/HBASE-21052) | After restoring a snapshot, table.jsp page for the table gets stuck |  Major | snapshots |
| [HBASE-21001](https://issues.apache.org/jira/browse/HBASE-21001) | ReplicationObserver fails to load in HBase 2.0.0 |  Major | . |
| [HBASE-20741](https://issues.apache.org/jira/browse/HBASE-20741) | Split of a region with replicas creates all daughter regions and its replica in same server |  Major | read replicas |
| [HBASE-21127](https://issues.apache.org/jira/browse/HBASE-21127) | TableRecordReader need to handle cursor result too |  Major | . |
| [HBASE-20892](https://issues.apache.org/jira/browse/HBASE-20892) | [UI] Start / End keys are empty on table.jsp |  Major | . |
| [HBASE-21136](https://issues.apache.org/jira/browse/HBASE-21136) | NPE in MetricsTableSourceImpl.updateFlushTime |  Major | metrics |
| [HBASE-21132](https://issues.apache.org/jira/browse/HBASE-21132) | return wrong result in rest multiget |  Major | . |
| [HBASE-21128](https://issues.apache.org/jira/browse/HBASE-21128) | TestAsyncRegionAdminApi.testAssignRegionAndUnassignRegion is broken |  Major | test |
| [HBASE-20940](https://issues.apache.org/jira/browse/HBASE-20940) | HStore.cansplit should not allow split to happen if it has references |  Major | . |
| [HBASE-21084](https://issues.apache.org/jira/browse/HBASE-21084) | When cloning a snapshot including a split parent region, the split parent region of the cloned table will be online |  Major | snapshots |
| [HBASE-20968](https://issues.apache.org/jira/browse/HBASE-20968) | list\_procedures\_test fails due to no matching regex |  Major | shell, test |
| [HBASE-21030](https://issues.apache.org/jira/browse/HBASE-21030) | Correct javadoc for append operation |  Minor | documentation |
| [HBASE-21088](https://issues.apache.org/jira/browse/HBASE-21088) | HStoreFile should be closed in HStore#hasReferences |  Major | . |
| [HBASE-20890](https://issues.apache.org/jira/browse/HBASE-20890) | PE filterScan seems to be stuck forever |  Minor | . |
| [HBASE-20772](https://issues.apache.org/jira/browse/HBASE-20772) | Controlled shutdown fills Master log with the disturbing message "No matching procedure found for rit=OPEN, location=ZZZZ, table=YYYYY, region=XXXX transition to CLOSED |  Major | logging |
| [HBASE-20978](https://issues.apache.org/jira/browse/HBASE-20978) | [amv2] Worker terminating UNNATURALLY during MoveRegionProcedure |  Critical | amv2 |
| [HBASE-21078](https://issues.apache.org/jira/browse/HBASE-21078) | [amv2] CODE-BUG NPE in RTP doing Unassign |  Major | amv2 |
| [HBASE-21113](https://issues.apache.org/jira/browse/HBASE-21113) | Apply the branch-2 version of HBASE-21095, The timeout retry logic for several procedures are broken after master restarts |  Major | amv2 |
| [HBASE-21101](https://issues.apache.org/jira/browse/HBASE-21101) | Remove the waitUntilAllRegionsAssigned call after split in TestTruncateTableProcedure |  Major | test |
| [HBASE-19008](https://issues.apache.org/jira/browse/HBASE-19008) | Add missing equals or hashCode method(s) to stock Filter implementations |  Major | . |
| [HBASE-20614](https://issues.apache.org/jira/browse/HBASE-20614) | REST scan API with incorrect filter text file throws HTTP 503 Service Unavailable error |  Minor | REST |
| [HBASE-21041](https://issues.apache.org/jira/browse/HBASE-21041) | Memstore's heap size will be decreased to minus zero after flush |  Major | . |
| [HBASE-21031](https://issues.apache.org/jira/browse/HBASE-21031) | Memory leak if replay edits failed during region opening |  Major | . |
| [HBASE-20666](https://issues.apache.org/jira/browse/HBASE-20666) | Unsuccessful table creation leaves entry in hbase:rsgroup table |  Minor | . |
| [HBASE-21032](https://issues.apache.org/jira/browse/HBASE-21032) | ScanResponses contain only one cell each |  Major | Performance, Scanners |
| [HBASE-20705](https://issues.apache.org/jira/browse/HBASE-20705) | Having RPC Quota on a table prevents Space quota to be recreated/removed |  Major | . |
| [HBASE-21058](https://issues.apache.org/jira/browse/HBASE-21058) | Nightly tests for branches 1 fail to build ref guide |  Major | documentation |
| [HBASE-21074](https://issues.apache.org/jira/browse/HBASE-21074) | JDK7 branches need to pass "-Dhttps.protocols=TLSv1.2" to maven when building |  Major | build, community, test |
| [HBASE-21062](https://issues.apache.org/jira/browse/HBASE-21062) | WALFactory has misleading notion of "default" |  Major | wal |
| [HBASE-21047](https://issues.apache.org/jira/browse/HBASE-21047) | Object creation of StoreFileScanner thru constructor and close may leave refCount to -1 |  Major | . |
| [HBASE-21005](https://issues.apache.org/jira/browse/HBASE-21005) | Maven site configuration causes downstream projects to get a directory named ${project.basedir} |  Minor | build |
| [HBASE-21007](https://issues.apache.org/jira/browse/HBASE-21007) | Memory leak in HBase rest server |  Critical | REST |
| [HBASE-20794](https://issues.apache.org/jira/browse/HBASE-20794) | CreateTable operation does not log its landing at the master nor the initiator at INFO level |  Major | logging |
| [HBASE-20538](https://issues.apache.org/jira/browse/HBASE-20538) | Upgrade our hadoop versions to 2.7.7 and 3.0.3 |  Critical | java, security |
| [HBASE-20927](https://issues.apache.org/jira/browse/HBASE-20927) | RSGroupAdminEndpoint doesn't handle clearing dead servers if they are not processed yet. |  Major | . |
| [HBASE-20932](https://issues.apache.org/jira/browse/HBASE-20932) | Effective MemStoreSize::hashCode() |  Major | . |
| [HBASE-20928](https://issues.apache.org/jira/browse/HBASE-20928) | Rewrite calculation of midpoint in binarySearch functions to prevent overflow |  Minor | io |
| [HBASE-20565](https://issues.apache.org/jira/browse/HBASE-20565) | ColumnRangeFilter combined with ColumnPaginationFilter can produce incorrect result since 1.4 |  Major | Filters |
| [HBASE-20908](https://issues.apache.org/jira/browse/HBASE-20908) | Infinite loop on regionserver if region replica are reduced |  Major | read replicas |
| [HBASE-19893](https://issues.apache.org/jira/browse/HBASE-19893) | restore\_snapshot is broken in master branch when region splits |  Critical | snapshots |
| [HBASE-20870](https://issues.apache.org/jira/browse/HBASE-20870) | Wrong HBase root dir in ITBLL's Search Tool |  Minor | integration tests |
| [HBASE-20901](https://issues.apache.org/jira/browse/HBASE-20901) | Reducing region replica has no effect |  Major | . |
| [HBASE-6028](https://issues.apache.org/jira/browse/HBASE-6028) | Implement a cancel for in-progress compactions |  Minor | regionserver |
| [HBASE-20869](https://issues.apache.org/jira/browse/HBASE-20869) | Endpoint-based Export use incorrect user to write to destination |  Major | Coprocessors |
| [HBASE-20879](https://issues.apache.org/jira/browse/HBASE-20879) | Compacting memstore config should handle lower case |  Major | . |
| [HBASE-20865](https://issues.apache.org/jira/browse/HBASE-20865) | CreateTableProcedure is stuck in retry loop in CREATE\_TABLE\_WRITE\_FS\_LAYOUT state |  Major | amv2 |
| [HBASE-19572](https://issues.apache.org/jira/browse/HBASE-19572) | RegionMover should use the configured default port number and not the one from HConstants |  Major | . |
| [HBASE-20697](https://issues.apache.org/jira/browse/HBASE-20697) | Can't cache All region locations of the specify table by calling table.getRegionLocator().getAllRegionLocations() |  Major | meta |
| [HBASE-20791](https://issues.apache.org/jira/browse/HBASE-20791) | RSGroupBasedLoadBalancer#setClusterMetrics should pass ClusterMetrics to its internalBalancer |  Major | Balancer, rsgroup |
| [HBASE-20770](https://issues.apache.org/jira/browse/HBASE-20770) | WAL cleaner logs way too much; gets clogged when lots of work to do |  Critical | logging |


### TESTS:

| JIRA | Summary | Priority | Component |
|:---- |:---- | :--- |:---- |
| [HBASE-21963](https://issues.apache.org/jira/browse/HBASE-21963) | Add a script for building and verifying release candidate |  Minor | community, scripts |
| [HBASE-21756](https://issues.apache.org/jira/browse/HBASE-21756) | Backport HBASE-21279 (Split TestAdminShell into several tests) to branch-2 |  Major | . |
| [HBASE-20136](https://issues.apache.org/jira/browse/HBASE-20136) | TestKeyValue misses ClassRule and Category annotations |  Minor | . |
| [HBASE-21261](https://issues.apache.org/jira/browse/HBASE-21261) | Add log4j.properties for hbase-rsgroup tests |  Trivial | . |
| [HBASE-21258](https://issues.apache.org/jira/browse/HBASE-21258) | Add resetting of flags for RS Group pre/post hooks in TestRSGroups |  Major | . |
| [HBASE-21097](https://issues.apache.org/jira/browse/HBASE-21097) | Flush pressure assertion may fail in testFlushThroughputTuning |  Major | regionserver |
| [HBASE-21138](https://issues.apache.org/jira/browse/HBASE-21138) | Close HRegion instance at the end of every test in TestHRegion |  Major | . |
| [HBASE-21161](https://issues.apache.org/jira/browse/HBASE-21161) | Enable the test added in HBASE-20741 that was removed accidentally |  Minor | . |
| [HBASE-21076](https://issues.apache.org/jira/browse/HBASE-21076) | TestTableResource fails with NPE |  Major | REST, test |
| [HBASE-20907](https://issues.apache.org/jira/browse/HBASE-20907) | Fix Intermittent failure on TestProcedurePriority |  Major | . |
| [HBASE-20838](https://issues.apache.org/jira/browse/HBASE-20838) | Include hbase-server in precommit test if CommonFSUtils is changed |  Major | . |


### SUB-TASKS:

| JIRA | Summary | Priority | Component |
|:---- |:---- | :--- |:---- |
| [HBASE-21970](https://issues.apache.org/jira/browse/HBASE-21970) | Document that how to upgrade from 2.0 or 2.1 to 2.2+ |  Major | . |
| [HBASE-22357](https://issues.apache.org/jira/browse/HBASE-22357) | Fix remaining Checkstyle issues in hbase-replication |  Trivial | Replication |
| [HBASE-22554](https://issues.apache.org/jira/browse/HBASE-22554) | Upgrade to surefire 2.22.2 |  Major | test |
| [HBASE-22500](https://issues.apache.org/jira/browse/HBASE-22500) | Modify pom and jenkins jobs for hadoop versions |  Blocker | build, hadoop2, hadoop3 |
| [HBASE-22316](https://issues.apache.org/jira/browse/HBASE-22316) | Record the stack trace for current thread in FutureUtils.get |  Major | asyncclient, Client |
| [HBASE-22326](https://issues.apache.org/jira/browse/HBASE-22326) | Fix Checkstyle errors in hbase-examples |  Minor | . |
| [HBASE-22327](https://issues.apache.org/jira/browse/HBASE-22327) | Fix remaining Checkstyle issues in hbase-hadoop-compat |  Trivial | . |
| [HBASE-22478](https://issues.apache.org/jira/browse/HBASE-22478) | Add jackson dependency for hbase-http module |  Major | build, dependencies |
| [HBASE-22445](https://issues.apache.org/jira/browse/HBASE-22445) | Add file info when throw exceptions in HFileReaderImpl |  Major | . |
| [HBASE-22447](https://issues.apache.org/jira/browse/HBASE-22447) | Check refCount before free block in BucketCache |  Major | BucketCache |
| [HBASE-22400](https://issues.apache.org/jira/browse/HBASE-22400) | Remove the adapter code in async fs implementation for hadoop-2.7.x |  Major | wal |
| [HBASE-22430](https://issues.apache.org/jira/browse/HBASE-22430) | hbase-vote should tee build and test output to console |  Trivial | . |
| [HBASE-22429](https://issues.apache.org/jira/browse/HBASE-22429) | hbase-vote download step requires URL to end with '/' |  Trivial | . |
| [HBASE-22405](https://issues.apache.org/jira/browse/HBASE-22405) | Update Ref Guide for EOL of Hadoop 2.7 |  Major | community, documentation |
| [HBASE-22325](https://issues.apache.org/jira/browse/HBASE-22325) | AsyncRpcRetryingCaller will not schedule retry if we hit a NotServingRegionException but there is no TableName provided |  Major | asyncclient, Client |
| [HBASE-22322](https://issues.apache.org/jira/browse/HBASE-22322) | Use special pause for CallQueueTooBigException |  Major | asyncclient, Client |
| [HBASE-22317](https://issues.apache.org/jira/browse/HBASE-22317) | Support reading from meta replicas |  Major | asyncclient, read replicas |
| [HBASE-22261](https://issues.apache.org/jira/browse/HBASE-22261) | Make use of ClusterStatusListener for async client |  Major | asyncclient |
| [HBASE-22267](https://issues.apache.org/jira/browse/HBASE-22267) | Implement client push back for async client |  Major | asyncclient |
| [HBASE-19763](https://issues.apache.org/jira/browse/HBASE-19763) | Fix Checkstyle errors in hbase-procedure |  Minor | . |
| [HBASE-22244](https://issues.apache.org/jira/browse/HBASE-22244) | Make use of MetricsConnection in async client |  Major | asyncclient, metrics |
| [HBASE-22196](https://issues.apache.org/jira/browse/HBASE-22196) | Split TestRestartCluster |  Major | test |
| [HBASE-22117](https://issues.apache.org/jira/browse/HBASE-22117) | Move hasPermission/checkPermissions from region server to master |  Major | . |
| [HBASE-21886](https://issues.apache.org/jira/browse/HBASE-21886) | Run ITBLL for branch-2.2 |  Major | . |
| [HBASE-22155](https://issues.apache.org/jira/browse/HBASE-22155) | Move 2.2.0 on to hbase-thirdparty-2.2.0 |  Major | thirdparty |
| [HBASE-22153](https://issues.apache.org/jira/browse/HBASE-22153) | Fix the flaky TestRestartCluster |  Major | test |
| [HBASE-22152](https://issues.apache.org/jira/browse/HBASE-22152) | Create a jenkins file for yetus to processing GitHub PR |  Major | build |
| [HBASE-22158](https://issues.apache.org/jira/browse/HBASE-22158) | RawAsyncHBaseAdmin.getTableSplits should filter out none default replicas |  Major | Admin |
| [HBASE-22157](https://issues.apache.org/jira/browse/HBASE-22157) | Include the cause when constructing RestoreSnapshotException in restoreSnapshot |  Major | Admin |
| [HBASE-22141](https://issues.apache.org/jira/browse/HBASE-22141) | Fix TestAsyncDecommissionAdminApi |  Major | test |
| [HBASE-22135](https://issues.apache.org/jira/browse/HBASE-22135) | AsyncAdmin will not refresh master address |  Major | Admin, asyncclient, Client |
| [HBASE-22101](https://issues.apache.org/jira/browse/HBASE-22101) | AsyncAdmin.isTableAvailable should not throw TableNotFoundException |  Major | Admin, asyncclient, Client |
| [HBASE-22094](https://issues.apache.org/jira/browse/HBASE-22094) | Throw TableNotFoundException if table not exists in AsyncAdmin.compact |  Major | Admin |
| [HBASE-21911](https://issues.apache.org/jira/browse/HBASE-21911) | Move getUserPermissions from regionserver to master |  Major | . |
| [HBASE-22015](https://issues.apache.org/jira/browse/HBASE-22015) | UserPermission should be annotated as InterfaceAudience.Public |  Blocker | . |
| [HBASE-22066](https://issues.apache.org/jira/browse/HBASE-22066) | Add markers to CHANGES.md and RELEASENOTES.md |  Major | . |
| [HBASE-22040](https://issues.apache.org/jira/browse/HBASE-22040) | Add mergeRegionsAsync with a List of region names method in AsyncAdmin |  Major | Admin, asyncclient, Client |
| [HBASE-22039](https://issues.apache.org/jira/browse/HBASE-22039) | Should add the synchronous parameter for the XXXSwitch method in AsyncAdmin |  Major | Admin, asyncclient, Client |
| [HBASE-22022](https://issues.apache.org/jira/browse/HBASE-22022) | nightly fails rat check down in the dev-support/hbase\_nightly\_source-artifact.sh check |  Major | . |
| [HBASE-22025](https://issues.apache.org/jira/browse/HBASE-22025) | RAT check fails in nightlies; fails on (old) test data files. |  Major | . |
| [HBASE-21977](https://issues.apache.org/jira/browse/HBASE-21977) | Skip replay WAL and update seqid when open regions restored from snapshot |  Major | Region Assignment, snapshots |
| [HBASE-21999](https://issues.apache.org/jira/browse/HBASE-21999) | [DEBUG] Exit if git returns empty revision! |  Major | build |
| [HBASE-22000](https://issues.apache.org/jira/browse/HBASE-22000) | Deprecated isTableAvailable with splitKeys |  Major | asyncclient, Client |
| [HBASE-21949](https://issues.apache.org/jira/browse/HBASE-21949) | Fix flaky test TestHBaseTestingUtility.testMiniZooKeeperWithMultipleClientPorts |  Major | . |
| [HBASE-21993](https://issues.apache.org/jira/browse/HBASE-21993) | Set version as 2.2.0 in branch-2.2 in prep for first RC |  Major | . |
| [HBASE-21997](https://issues.apache.org/jira/browse/HBASE-21997) | Fix hbase-rest findbugs ST\_WRITE\_TO\_STATIC\_FROM\_INSTANCE\_METHOD complaint |  Major | REST |
| [HBASE-21986](https://issues.apache.org/jira/browse/HBASE-21986) | Generate CHANGES.md and RELEASENOTES.md for 2.2.0 |  Major | . |
| [HBASE-21972](https://issues.apache.org/jira/browse/HBASE-21972) | Copy master doc into branch-2.2 and edit to make it suit 2.2.0 |  Major | . |
| [HBASE-15728](https://issues.apache.org/jira/browse/HBASE-15728) | Add remaining per-table region / store / flush / compaction related metrics |  Major | metrics |
| [HBASE-21934](https://issues.apache.org/jira/browse/HBASE-21934) | RemoteProcedureDispatcher should track the ongoing dispatched calls |  Blocker | proc-v2 |
| [HBASE-21588](https://issues.apache.org/jira/browse/HBASE-21588) | Procedure v2 wal splitting implementation |  Major | . |
| [HBASE-21729](https://issues.apache.org/jira/browse/HBASE-21729) | Extract ProcedureCoordinatorRpcs and ProcedureMemberRpcs from CoordinatedStateManager |  Major | . |
| [HBASE-21094](https://issues.apache.org/jira/browse/HBASE-21094) | Remove the explicit timeout config for TestTruncateTableProcedure |  Major | test |
| [HBASE-21093](https://issues.apache.org/jira/browse/HBASE-21093) | Move TestCreateTableProcedure.testMRegions to a separated file |  Major | test |
| [HBASE-18201](https://issues.apache.org/jira/browse/HBASE-18201) | add UT and docs for DataBlockEncodingTool |  Minor | tooling |
| [HBASE-21978](https://issues.apache.org/jira/browse/HBASE-21978) | Should close AsyncRegistry if we fail to get cluster id when creating AsyncConnection |  Major | asyncclient, Client |
| [HBASE-21974](https://issues.apache.org/jira/browse/HBASE-21974) | Change Admin#grant/revoke parameter from UserPermission to user and Permission |  Major | . |
| [HBASE-21976](https://issues.apache.org/jira/browse/HBASE-21976) | Deal with RetryImmediatelyException for batching request |  Major | asyncclient, Client |
| [HBASE-21820](https://issues.apache.org/jira/browse/HBASE-21820) | Implement CLUSTER quota scope |  Major | . |
| [HBASE-21962](https://issues.apache.org/jira/browse/HBASE-21962) | Filters do not work in ThriftTable |  Major | Thrift |
| [HBASE-21927](https://issues.apache.org/jira/browse/HBASE-21927) | Always fail the locate request when error occur |  Major | asyncclient, Client |
| [HBASE-21944](https://issues.apache.org/jira/browse/HBASE-21944) | Validate put for batch operation |  Major | asyncclient, Client |
| [HBASE-21945](https://issues.apache.org/jira/browse/HBASE-21945) | Maintain the original order when sending batch request |  Major | asyncclient, Client |
| [HBASE-21783](https://issues.apache.org/jira/browse/HBASE-21783) | Support exceed user/table/ns throttle quota if region server has available quota |  Major | . |
| [HBASE-21930](https://issues.apache.org/jira/browse/HBASE-21930) | Deal with ScannerResetException when opening region scanner |  Major | asyncclient, Client |
| [HBASE-21907](https://issues.apache.org/jira/browse/HBASE-21907) | Should set priority for rpc request |  Major | asyncclient, Client |
| [HBASE-21909](https://issues.apache.org/jira/browse/HBASE-21909) | Validate the put instance before executing in AsyncTable.put method |  Major | asyncclient, Client |
| [HBASE-21814](https://issues.apache.org/jira/browse/HBASE-21814) | Remove the TODO in AccessControlLists#addUserPermission |  Major | . |
| [HBASE-19889](https://issues.apache.org/jira/browse/HBASE-19889) | Revert Workaround: Purge User API building from branch-2 so can make a beta-1 |  Major | website |
| [HBASE-21838](https://issues.apache.org/jira/browse/HBASE-21838) | Create a special ReplicationEndpoint just for verifying the WAL entries are fine |  Major | Replication, wal |
| [HBASE-21829](https://issues.apache.org/jira/browse/HBASE-21829) | Use FutureUtils.addListener instead of calling whenComplete directly |  Major | asyncclient, Client |
| [HBASE-21828](https://issues.apache.org/jira/browse/HBASE-21828) | Make sure we do not return CompletionException when locating region |  Major | asyncclient, Client |
| [HBASE-21764](https://issues.apache.org/jira/browse/HBASE-21764) | Size of in-memory compaction thread pool should be configurable |  Major | Compaction, in-memory-compaction |
| [HBASE-21809](https://issues.apache.org/jira/browse/HBASE-21809) | Add retry thrift client for ThriftTable/Admin |  Major | . |
| [HBASE-21739](https://issues.apache.org/jira/browse/HBASE-21739) | Move grant/revoke from regionserver to master |  Major | . |
| [HBASE-21798](https://issues.apache.org/jira/browse/HBASE-21798) | Cut branch-2.2 |  Major | . |
| [HBASE-20542](https://issues.apache.org/jira/browse/HBASE-20542) | Better heap utilization for IMC with MSLABs |  Major | in-memory-compaction |
| [HBASE-21713](https://issues.apache.org/jira/browse/HBASE-21713) | Support set region server throttle quota |  Major | . |
| [HBASE-21761](https://issues.apache.org/jira/browse/HBASE-21761) | Align the methods in RegionLocator and AsyncTableRegionLocator |  Major | asyncclient, Client |
| [HBASE-17370](https://issues.apache.org/jira/browse/HBASE-17370) | Fix or provide shell scripts to drain and decommission region server |  Major | . |
| [HBASE-21750](https://issues.apache.org/jira/browse/HBASE-21750) | Most of KeyValueUtil#length can be replaced by cell#getSerializedSize for better performance because the latter one has been optimized |  Major | . |
| [HBASE-21734](https://issues.apache.org/jira/browse/HBASE-21734) | Some optimization in FilterListWithOR |  Major | . |
| [HBASE-21738](https://issues.apache.org/jira/browse/HBASE-21738) | Remove all the CSLM#size operation in our memstore because it's an quite time consuming. |  Critical | Performance |
| [HBASE-21034](https://issues.apache.org/jira/browse/HBASE-21034) | Add new throttle type: read/write capacity unit |  Major | . |
| [HBASE-21726](https://issues.apache.org/jira/browse/HBASE-21726) | Add getAllRegionLocations method to AsyncTableRegionLocator |  Major | asyncclient, Client |
| [HBASE-19695](https://issues.apache.org/jira/browse/HBASE-19695) | Handle disabled table for async client |  Major | asyncclient, Client |
| [HBASE-21711](https://issues.apache.org/jira/browse/HBASE-21711) | Remove references to git.apache.org/hbase.git |  Critical | . |
| [HBASE-21647](https://issues.apache.org/jira/browse/HBASE-21647) | Add status track for splitting WAL tasks |  Major | Operability |
| [HBASE-21705](https://issues.apache.org/jira/browse/HBASE-21705) | Should treat meta table specially for some methods in AsyncAdmin |  Major | Admin, asyncclient, Client |
| [HBASE-21663](https://issues.apache.org/jira/browse/HBASE-21663) | Add replica scan support |  Major | asyncclient, Client, read replicas |
| [HBASE-21580](https://issues.apache.org/jira/browse/HBASE-21580) | Support getting Hbck instance from AsyncConnection |  Major | asyncclient, Client, hbck2 |
| [HBASE-21652](https://issues.apache.org/jira/browse/HBASE-21652) | Refactor ThriftServer making thrift2 server inherited from thrift1 server |  Major | . |
| [HBASE-21661](https://issues.apache.org/jira/browse/HBASE-21661) | Provide Thrift2 implementation of Table/Admin |  Major | . |
| [HBASE-21682](https://issues.apache.org/jira/browse/HBASE-21682) | Support getting from specific replica |  Major | read replicas |
| [HBASE-21159](https://issues.apache.org/jira/browse/HBASE-21159) | Add shell command to switch throttle on or off |  Major | . |
| [HBASE-21362](https://issues.apache.org/jira/browse/HBASE-21362) | Disable printing of stack-trace in shell when quotas are violated |  Minor | shell |
| [HBASE-21361](https://issues.apache.org/jira/browse/HBASE-21361) | Disable printing of stack-trace in shell when quotas are not enabled |  Minor | shell |
| [HBASE-17356](https://issues.apache.org/jira/browse/HBASE-17356) | Add replica get support |  Major | Client |
| [HBASE-21650](https://issues.apache.org/jira/browse/HBASE-21650) | Add DDL operation and some other miscellaneous to thrift2 |  Major | Thrift |
| [HBASE-21401](https://issues.apache.org/jira/browse/HBASE-21401) | Sanity check when constructing the KeyValue |  Critical | regionserver |
| [HBASE-21578](https://issues.apache.org/jira/browse/HBASE-21578) | Fix wrong throttling exception for capacity unit |  Major | . |
| [HBASE-21570](https://issues.apache.org/jira/browse/HBASE-21570) | Add write buffer periodic flush support for AsyncBufferedMutator |  Major | asyncclient, Client |
| [HBASE-21465](https://issues.apache.org/jira/browse/HBASE-21465) | Retry on reportRegionStateTransition can lead to unexpected errors |  Major | amv2 |
| [HBASE-21508](https://issues.apache.org/jira/browse/HBASE-21508) | Ignore the reportRegionStateTransition call from a dead server |  Major | amv2 |
| [HBASE-21490](https://issues.apache.org/jira/browse/HBASE-21490) | WALProcedure may remove proc wal files still with active procedures |  Major | proc-v2 |
| [HBASE-21377](https://issues.apache.org/jira/browse/HBASE-21377) | Add debug log for procedure stack id related operations |  Major | proc-v2 |
| [HBASE-21472](https://issues.apache.org/jira/browse/HBASE-21472) | Should not persist the dispatched field for RegionRemoteProcedureBase |  Major | amv2 |
| [HBASE-21473](https://issues.apache.org/jira/browse/HBASE-21473) | RowIndexSeekerV1 may return cell with extra two \\x00\\x00 bytes which has no tags |  Major | . |
| [HBASE-21463](https://issues.apache.org/jira/browse/HBASE-21463) | The checkOnlineRegionsReport can accidentally complete a TRSP |  Critical | amv2 |
| [HBASE-21376](https://issues.apache.org/jira/browse/HBASE-21376) | Add some verbose log to MasterProcedureScheduler |  Major | logging, proc-v2 |
| [HBASE-21443](https://issues.apache.org/jira/browse/HBASE-21443) | [hbase-connectors] Purge hbase-\* modules from core now they've been moved to hbase-connectors |  Major | hbase-connectors, spark |
| [HBASE-21421](https://issues.apache.org/jira/browse/HBASE-21421) | Do not kill RS if reportOnlineRegions fails |  Major | . |
| [HBASE-21314](https://issues.apache.org/jira/browse/HBASE-21314) | The implementation of BitSetNode is not efficient |  Major | proc-v2 |
| [HBASE-21351](https://issues.apache.org/jira/browse/HBASE-21351) | The force update thread may have race with PE worker when the procedure is rolling back |  Critical | proc-v2 |
| [HBASE-21191](https://issues.apache.org/jira/browse/HBASE-21191) | Add a holding-pattern if no assign for meta or namespace (Can happen if masterprocwals have been cleared). |  Major | amv2 |
| [HBASE-21322](https://issues.apache.org/jira/browse/HBASE-21322) | Add a scheduleServerCrashProcedure() API to HbckService |  Critical | hbck2 |
| [HBASE-21375](https://issues.apache.org/jira/browse/HBASE-21375) | Revisit the lock and queue implementation in MasterProcedureScheduler |  Major | proc-v2 |
| [HBASE-20973](https://issues.apache.org/jira/browse/HBASE-20973) | ArrayIndexOutOfBoundsException when rolling back procedure |  Critical | amv2 |
| [HBASE-21384](https://issues.apache.org/jira/browse/HBASE-21384) | Procedure with holdlock=false should not be restored lock when restarts |  Blocker | . |
| [HBASE-21364](https://issues.apache.org/jira/browse/HBASE-21364) | Procedure holds the lock should put to front of the queue after restart |  Blocker | . |
| [HBASE-21215](https://issues.apache.org/jira/browse/HBASE-21215) | Figure how to invoke hbck2; make it easy to find |  Major | amv2, hbck2 |
| [HBASE-21372](https://issues.apache.org/jira/browse/HBASE-21372) | Set hbase.assignment.maximum.attempts to Long.MAX |  Major | amv2 |
| [HBASE-21363](https://issues.apache.org/jira/browse/HBASE-21363) | Rewrite the buildingHoldCleanupTracker method in WALProcedureStore |  Major | proc-v2 |
| [HBASE-21338](https://issues.apache.org/jira/browse/HBASE-21338) | [balancer] If balancer is an ill-fit for cluster size, it gives little indication |  Major | Balancer, Operability |
| [HBASE-21192](https://issues.apache.org/jira/browse/HBASE-21192) | Add HOW-TO repair damaged AMv2. |  Major | amv2 |
| [HBASE-21073](https://issues.apache.org/jira/browse/HBASE-21073) | "Maintenance mode" master |  Major | amv2, hbck2, master |
| [HBASE-21354](https://issues.apache.org/jira/browse/HBASE-21354) | Procedure may be deleted improperly during master restarts resulting in 'Corrupt' |  Major | . |
| [HBASE-21336](https://issues.apache.org/jira/browse/HBASE-21336) | Simplify the implementation of WALProcedureMap |  Major | proc-v2 |
| [HBASE-21323](https://issues.apache.org/jira/browse/HBASE-21323) | Should not skip force updating for a sub procedure even if it has been finished |  Major | proc-v2 |
| [HBASE-21269](https://issues.apache.org/jira/browse/HBASE-21269) | Forward-port to branch-2 " HBASE-21213 [hbck2] bypass leaves behind     state in RegionStates when assign/unassign" |  Major | amv2 |
| [HBASE-20716](https://issues.apache.org/jira/browse/HBASE-20716) | Unsafe access cleanup |  Critical | Performance |
| [HBASE-21330](https://issues.apache.org/jira/browse/HBASE-21330) | ReopenTableRegionsProcedure will enter an infinite loop if we schedule a TRSP at the same time |  Major | amv2 |
| [HBASE-21310](https://issues.apache.org/jira/browse/HBASE-21310) | Split TestCloneSnapshotFromClient |  Major | test |
| [HBASE-21311](https://issues.apache.org/jira/browse/HBASE-21311) | Split TestRestoreSnapshotFromClient |  Major | test |
| [HBASE-21315](https://issues.apache.org/jira/browse/HBASE-21315) | The getActiveMinProcId and getActiveMaxProcId of BitSetNode are incorrect if there are no active procedure |  Major | . |
| [HBASE-21278](https://issues.apache.org/jira/browse/HBASE-21278) | Do not rollback successful sub procedures when rolling back a procedure |  Critical | proc-v2 |
| [HBASE-21309](https://issues.apache.org/jira/browse/HBASE-21309) | Increase the waiting timeout for TestProcedurePriority |  Major | test |
| [HBASE-21254](https://issues.apache.org/jira/browse/HBASE-21254) | Need to find a way to limit the number of proc wal files |  Critical | proc-v2 |
| [HBASE-21250](https://issues.apache.org/jira/browse/HBASE-21250) | Refactor WALProcedureStore and add more comments for better understanding the implementation |  Major | proc-v2 |
| [HBASE-19275](https://issues.apache.org/jira/browse/HBASE-19275) | TestSnapshotFileCache never worked properly |  Major | . |
| [HBASE-21249](https://issues.apache.org/jira/browse/HBASE-21249) | Add jitter for ProcedureUtil.getBackoffTimeMs |  Major | proc-v2 |
| [HBASE-21244](https://issues.apache.org/jira/browse/HBASE-21244) | Skip persistence when retrying for assignment related procedures |  Major | amv2, Performance, proc-v2 |
| [HBASE-21233](https://issues.apache.org/jira/browse/HBASE-21233) | Allow the procedure implementation to skip persistence of the state after a execution |  Major | Performance, proc-v2 |
| [HBASE-21227](https://issues.apache.org/jira/browse/HBASE-21227) | Implement exponential retrying backoff for Assign/UnassignRegionHandler introduced in HBASE-21217 |  Major | amv2, regionserver |
| [HBASE-21217](https://issues.apache.org/jira/browse/HBASE-21217) | Revisit the executeProcedure method for open/close region |  Critical | amv2, proc-v2 |
| [HBASE-21214](https://issues.apache.org/jira/browse/HBASE-21214) | [hbck2] setTableState just sets hbase:meta state, not in-memory state |  Major | amv2, hbck2 |
| [HBASE-21023](https://issues.apache.org/jira/browse/HBASE-21023) | Add bypassProcedureToCompletion() API to HbckService |  Major | hbck2 |
| [HBASE-21156](https://issues.apache.org/jira/browse/HBASE-21156) | [hbck2] Queue an assign of hbase:meta and bulk assign/unassign |  Critical | hbck2 |
| [HBASE-21169](https://issues.apache.org/jira/browse/HBASE-21169) | Initiate hbck2 tool in hbase-operator-tools repo |  Major | hbck2 |
| [HBASE-21172](https://issues.apache.org/jira/browse/HBASE-21172) | Reimplement the retry backoff logic for ReopenTableRegionsProcedure |  Major | amv2, proc-v2 |
| [HBASE-21189](https://issues.apache.org/jira/browse/HBASE-21189) | flaky job should gather machine stats |  Minor | test |
| [HBASE-21190](https://issues.apache.org/jira/browse/HBASE-21190) | Log files and count of entries in each as we load from the MasterProcWAL store |  Major | amv2 |
| [HBASE-21083](https://issues.apache.org/jira/browse/HBASE-21083) | Introduce a mechanism to bypass the execution of a stuck procedure |  Major | amv2 |
| [HBASE-21017](https://issues.apache.org/jira/browse/HBASE-21017) | Revisit the expected states for open/close |  Major | amv2 |
| [HBASE-20941](https://issues.apache.org/jira/browse/HBASE-20941) | Create and implement HbckService in master |  Major | . |
| [HBASE-21072](https://issues.apache.org/jira/browse/HBASE-21072) | Block out HBCK1 in hbase2 |  Major | hbck |
| [HBASE-21095](https://issues.apache.org/jira/browse/HBASE-21095) | The timeout retry logic for several procedures are broken after master restarts |  Critical | amv2, proc-v2 |
| [HBASE-20975](https://issues.apache.org/jira/browse/HBASE-20975) | Lock may not be taken or released while rolling back procedure |  Major | amv2 |
| [HBASE-21025](https://issues.apache.org/jira/browse/HBASE-21025) | Add cache for TableStateManager |  Major | . |
| [HBASE-21012](https://issues.apache.org/jira/browse/HBASE-21012) | Revert the change of serializing TimeRangeTracker |  Critical | . |
| [HBASE-20813](https://issues.apache.org/jira/browse/HBASE-20813) | Remove RPC quotas when the associated table/Namespace is dropped off |  Minor | . |
| [HBASE-20885](https://issues.apache.org/jira/browse/HBASE-20885) | Remove entry for RPC quota from hbase:quota when RPC quota is removed. |  Minor | . |
| [HBASE-20893](https://issues.apache.org/jira/browse/HBASE-20893) | Data loss if splitting region while ServerCrashProcedure executing |  Major | . |
| [HBASE-20950](https://issues.apache.org/jira/browse/HBASE-20950) | Helper method to configure secure DFS cluster for tests |  Major | test |
| [HBASE-19369](https://issues.apache.org/jira/browse/HBASE-19369) | HBase Should use Builder Pattern to Create Log Files while using WAL on Erasure Coding |  Major | . |
| [HBASE-20939](https://issues.apache.org/jira/browse/HBASE-20939) | There will be race when we call suspendIfNotReady and then throw ProcedureSuspendedException |  Critical | amv2 |
| [HBASE-20921](https://issues.apache.org/jira/browse/HBASE-20921) | Possible NPE in ReopenTableRegionsProcedure |  Major | amv2 |
| [HBASE-20867](https://issues.apache.org/jira/browse/HBASE-20867) | RS may get killed while master restarts |  Major | . |
| [HBASE-20878](https://issues.apache.org/jira/browse/HBASE-20878) | Data loss if merging regions while ServerCrashProcedure executing |  Critical | amv2 |
| [HBASE-20846](https://issues.apache.org/jira/browse/HBASE-20846) | Restore procedure locks when master restarts |  Major | . |
| [HBASE-20914](https://issues.apache.org/jira/browse/HBASE-20914) | Trim Master memory usage |  Major | Balancer, master |
| [HBASE-20853](https://issues.apache.org/jira/browse/HBASE-20853) | Polish "Add defaults to Table Interface so Implementors don't have to" |  Major | API |
| [HBASE-20875](https://issues.apache.org/jira/browse/HBASE-20875) | MemStoreLABImp::copyIntoCell uses 7% CPU when writing |  Major | Performance |
| [HBASE-20860](https://issues.apache.org/jira/browse/HBASE-20860) | Merged region's RIT state may not be cleaned after master restart |  Major | . |
| [HBASE-20847](https://issues.apache.org/jira/browse/HBASE-20847) | The parent procedure of RegionTransitionProcedure may not have the table lock |  Major | proc-v2, Region Assignment |
| [HBASE-20776](https://issues.apache.org/jira/browse/HBASE-20776) | Update branch-2 version to 2.2.0-SNAPSHOT |  Major | build |


### OTHER:

| JIRA | Summary | Priority | Component |
|:---- |:---- | :--- |:---- |
| [HBASE-21612](https://issues.apache.org/jira/browse/HBASE-21612) | Add developer debug options in  HBase Config for REST server |  Minor | Operability, REST, scripts |
| [HBASE-18735](https://issues.apache.org/jira/browse/HBASE-18735) | Provide a fast mechanism for shutting down mini cluster |  Major | . |
| [HBASE-21489](https://issues.apache.org/jira/browse/HBASE-21489) | TestShell is broken |  Major | shell |
| [HBASE-20152](https://issues.apache.org/jira/browse/HBASE-20152) | [AMv2] DisableTableProcedure versus ServerCrashProcedure |  Major | amv2 |
| [HBASE-20540](https://issues.apache.org/jira/browse/HBASE-20540) | [umbrella] Hadoop 3 compatibility |  Major | . |
| [HBASE-21536](https://issues.apache.org/jira/browse/HBASE-21536) | Fix completebulkload usage instructions |  Trivial | documentation, mapreduce |
| [HBASE-22449](https://issues.apache.org/jira/browse/HBASE-22449) | https everywhere in Maven metadata |  Minor | . |
| [HBASE-22406](https://issues.apache.org/jira/browse/HBASE-22406) | skip generating rdoc when building gems in our docker image for running yetus |  Critical | build, test |
| [HBASE-22375](https://issues.apache.org/jira/browse/HBASE-22375) | Promote AccessChecker to LimitedPrivate(Coprocessor) |  Minor | Coprocessors, security |
| [HBASE-21714](https://issues.apache.org/jira/browse/HBASE-21714) | Deprecated isTableAvailableWithSplit method in thrift module |  Major | Thrift |
| [HBASE-22359](https://issues.apache.org/jira/browse/HBASE-22359) | Backport of HBASE-21371 misses activation-api license information |  Minor | build, community |
| [HBASE-22174](https://issues.apache.org/jira/browse/HBASE-22174) | Remove error prone from our precommit javac check |  Major | build |
| [HBASE-22231](https://issues.apache.org/jira/browse/HBASE-22231) | Remove unused and \* imports |  Minor | . |
| [HBASE-22304](https://issues.apache.org/jira/browse/HBASE-22304) | Fix remaining Checkstyle issues in hbase-endpoint |  Trivial | . |
| [HBASE-22020](https://issues.apache.org/jira/browse/HBASE-22020) | upgrade to yetus 0.9.0 |  Major | build, community |
| [HBASE-22187](https://issues.apache.org/jira/browse/HBASE-22187) | Remove usage of deprecated ClusterConnection.clearRegionCache |  Trivial | Client |
| [HBASE-22203](https://issues.apache.org/jira/browse/HBASE-22203) | Reformat DemoClient.java |  Trivial | . |
| [HBASE-22189](https://issues.apache.org/jira/browse/HBASE-22189) | Remove usage of StoreFile.getModificationTimeStamp |  Trivial | . |
| [HBASE-22108](https://issues.apache.org/jira/browse/HBASE-22108) | Avoid passing null in Admin methods |  Major | Admin |
| [HBASE-22007](https://issues.apache.org/jira/browse/HBASE-22007) | Add restoreSnapshot and cloneSnapshot with acl methods in AsyncAdmin |  Major | Admin, asyncclient, Client |
| [HBASE-22131](https://issues.apache.org/jira/browse/HBASE-22131) | Delete the patches in hbase-protocol-shaded module |  Major | build, Protobufs |
| [HBASE-22099](https://issues.apache.org/jira/browse/HBASE-22099) | Backport HBASE-21895 "Error prone upgrade" to branch-2 |  Major | build |
| [HBASE-22052](https://issues.apache.org/jira/browse/HBASE-22052) | pom cleaning; filter out jersey-core in hadoop2 to match hadoop3 and remove redunant version specifications |  Major | . |
| [HBASE-22065](https://issues.apache.org/jira/browse/HBASE-22065) | Add listTableDescriptors(List\<TableName\>) method in AsyncAdmin |  Major | Admin |
| [HBASE-22042](https://issues.apache.org/jira/browse/HBASE-22042) | Missing @Override annotation for RawAsyncTableImpl.scan |  Major | asyncclient, Client |
| [HBASE-21057](https://issues.apache.org/jira/browse/HBASE-21057) | upgrade to latest spotbugs |  Minor | community, test |
| [HBASE-21888](https://issues.apache.org/jira/browse/HBASE-21888) | Add a isClosed method to AsyncConnection |  Major | asyncclient, Client |
| [HBASE-21884](https://issues.apache.org/jira/browse/HBASE-21884) | Fix box/unbox findbugs warning in secure bulk load |  Minor | . |
| [HBASE-21859](https://issues.apache.org/jira/browse/HBASE-21859) | Add clearRegionLocationCache method for AsyncConnection |  Major | asyncclient, Client |
| [HBASE-21853](https://issues.apache.org/jira/browse/HBASE-21853) | update copyright notices to 2019 |  Major | documentation |
| [HBASE-21791](https://issues.apache.org/jira/browse/HBASE-21791) | Upgrade thrift dependency to 0.12.0 |  Blocker | Thrift |
| [HBASE-21710](https://issues.apache.org/jira/browse/HBASE-21710) | Add quota related methods to the Admin interface |  Major | . |
| [HBASE-21782](https://issues.apache.org/jira/browse/HBASE-21782) | LoadIncrementalHFiles should not be IA.Public |  Major | mapreduce |
| [HBASE-21762](https://issues.apache.org/jira/browse/HBASE-21762) | Move some methods in ClusterConnection to Connection |  Major | Client |
| [HBASE-21715](https://issues.apache.org/jira/browse/HBASE-21715) | Do not throw UnsupportedOperationException in ProcedureFuture.get |  Major | Client |
| [HBASE-21716](https://issues.apache.org/jira/browse/HBASE-21716) | Add toStringCustomizedValues to TableDescriptor |  Major | . |
| [HBASE-21731](https://issues.apache.org/jira/browse/HBASE-21731) | Do not need to use ClusterConnection in IntegrationTestBigLinkedListWithVisibility |  Major | . |
| [HBASE-21685](https://issues.apache.org/jira/browse/HBASE-21685) | Change repository urls to Gitbox |  Critical | . |
| [HBASE-21534](https://issues.apache.org/jira/browse/HBASE-21534) | TestAssignmentManager is flakey |  Major | test |
| [HBASE-21541](https://issues.apache.org/jira/browse/HBASE-21541) | Move MetaTableLocator.verifyRegionLocation to hbase-rsgroup module |  Major | . |
| [HBASE-21265](https://issues.apache.org/jira/browse/HBASE-21265) | Split up TestRSGroups |  Minor | rsgroup, test |
| [HBASE-21517](https://issues.apache.org/jira/browse/HBASE-21517) | Move the getTableRegionForRow method from HMaster to TestMaster |  Major | test |
| [HBASE-21281](https://issues.apache.org/jira/browse/HBASE-21281) | Update bouncycastle dependency. |  Major | dependencies, test |
| [HBASE-21198](https://issues.apache.org/jira/browse/HBASE-21198) | Exclude dependency on net.minidev:json-smart |  Major | . |
| [HBASE-21282](https://issues.apache.org/jira/browse/HBASE-21282) | Upgrade to latest jetty 9.2 and 9.3 versions |  Major | dependencies |
| [HBASE-21287](https://issues.apache.org/jira/browse/HBASE-21287) | JVMClusterUtil Master initialization wait time not configurable |  Major | test |
| [HBASE-21168](https://issues.apache.org/jira/browse/HBASE-21168) | BloomFilterUtil uses hardcoded randomness |  Trivial | . |
| [HBASE-20482](https://issues.apache.org/jira/browse/HBASE-20482) | Print a link to the ref guide chapter for the shell during startup |  Minor | documentation, shell |
| [HBASE-20942](https://issues.apache.org/jira/browse/HBASE-20942) | Improve RpcServer TRACE logging |  Major | Operability |
| [HBASE-20989](https://issues.apache.org/jira/browse/HBASE-20989) | Minor, miscellaneous logging fixes |  Trivial | logging |