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    contributor license agreements.  See the NOTICE file distributed with
    this work for additional information regarding copyright ownership.
    The ASF licenses this file to You under the Apache License, Version 2.0
    (the "License"); you may not use this file except in compliance with
    the License.  You may obtain a copy of the License at

         https://www.apache.org/licenses/LICENSE-2.0

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    distributed under the License is distributed on an "AS IS" BASIS,
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= 2.0 (2014-07-12)

This is the first GA release, after thirteen prior releases over the last 4 years.

Apache Log4j 2.0 requires a minimum of Java 6 to build and run.
Basic compatibility with Log4j 1.x is provided through the `log4j-1.2-api` component, however it does not implement some of the very implementation specific classes and methods.
The package names and Maven `groupId` have been changed to `org.apache.logging.log4j` to avoid any conflicts with Log4j 1.x.

For complete information on Apache Log4j 2, including instructions on how to submit bug reports,
patches, or suggestions for improvement, see http://logging.apache.org/log4j/2.x/[the Apache Log4j 2 website].


[#release-notes-2-0-added]
=== Added

* Added support for generating custom logger wrappers that replace the existing log levels and extended logger wrappers that add custom log levels to the existing ones. (https://issues.apache.org/jira/browse/LOG4J2-519[LOG4J2-519])
* RegexFilter does not match multiline log messages. (https://issues.apache.org/jira/browse/LOG4J2-696[LOG4J2-696])

[#release-notes-2-0-changed]
=== Changed

* Make org.apache.logging.log4j.core.layout.AbstractLayout immutable. (https://issues.apache.org/jira/browse/LOG4J2-685[LOG4J2-685])
* Update Jackson to 2.4.1. (https://issues.apache.org/jira/browse/LOG4J2-689[LOG4J2-689])
* Update Apache Commons Logging to 1.2 from 1.1.3. (https://issues.apache.org/jira/browse/LOG4J2-709[LOG4J2-709])

[#release-notes-2-0-fixed]
=== Fixed

* LoggerConfigs with no Level now inherit the Level from their parent. (https://issues.apache.org/jira/browse/LOG4J2-441[LOG4J2-441])
* JMX GUI: fixed occasional ArrayIndexOutOfBoundsException after pressing "reconfigure with XML below". (Fixed in RC2, but wasn't included in release notes.) (https://issues.apache.org/jira/browse/LOG4J2-538[LOG4J2-538])
* Fixed Serialization error with SocketAppender and Async Loggers. (Fixed in RC2, but wasn't included in release notes.) (https://issues.apache.org/jira/browse/LOG4J2-625[LOG4J2-625])
* Update docs to clarify how to use formatter logger and standard logger together. (https://issues.apache.org/jira/browse/LOG4J2-631[LOG4J2-631])
* AsyncLoggerContextSelector should ensure that different AsyncLoggerContext objects created by web app classloaders have unique names. (https://issues.apache.org/jira/browse/LOG4J2-666[LOG4J2-666])
* Special characters (tab and so on) in PatternLayout do not work. (https://issues.apache.org/jira/browse/LOG4J2-682[LOG4J2-682])
* Fix annotation processor warnings on JDK 1.7+. (https://issues.apache.org/jira/browse/LOG4J2-683[LOG4J2-683])
* Core's OptionConverter support for \b is broken (affects PatternLayout). (https://issues.apache.org/jira/browse/LOG4J2-686[LOG4J2-686])
* Rename org.apache.logging.log4j.core.util.Closer.closeSilent() to closeSilently(). (https://issues.apache.org/jira/browse/LOG4J2-687[LOG4J2-687])
* Make org.apache.logging.log4j.core.layout.PatternLayout immutable. (https://issues.apache.org/jira/browse/LOG4J2-688[LOG4J2-688])
* Log4j Web test dependencies should be in scope "test" in the pom. (https://issues.apache.org/jira/browse/LOG4J2-690[LOG4J2-690])
* Update documentation to specify only Maven 3 is supported. (https://issues.apache.org/jira/browse/LOG4J2-692[LOG4J2-692])
* Fix strange compilation error that popped up in a test class. (https://issues.apache.org/jira/browse/LOG4J2-694[LOG4J2-694])
* PatternLayout manual page missing documentation on header/footer. (https://issues.apache.org/jira/browse/LOG4J2-699[LOG4J2-699])
* Fixed issue where Async Logger does not log thread context stack data. API change: added method getImmutableStackOrNull() to ThreadContext.ContextStack interface. (https://issues.apache.org/jira/browse/LOG4J2-705[LOG4J2-705])
* Some exceptions are not logged when configuration problems are detected. (https://issues.apache.org/jira/browse/LOG4J2-707[LOG4J2-707])
