Log4j 2.0 正式版终于发布了，改进内容：
New features:
o LOG4J2-519: 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.
o LOG4J2-696: RegexFilter does not match multiline log messages.
Fixed Bugs:
o LOG4J2-705: Fixed issue where Async Logger does not log thread context stack data.
API change: added method getImmutableStackOrNull() to ThreadContext.ContextStack interface.
o LOG4J2-631: Update docs to clarify how to use formatter logger and standard logger together.
o LOG4J2-441: LoggerConfigs with no Level now inherit the Level from their parent.
o LOG4J2-703: Android: Could not find class 'javax.naming.InitialContext', referenced from
method org.apache.logging.log4j.core.lookup.JndiLookup.lookup. Thanks to Nelson Melina.
o LOG4J2-699: PatternLayout manual page missing documentation on header/footer.
o LOG4J2-625: Fixed Serialization error with SocketAppender and Async Loggers.
(Fixed in RC2, but wasn't included in release notes.)
o LOG4J2-538: JMX GUI: fixed occasional ArrayIndexOutOfBoundsException after pressing "reconfigure
with XML below".
(Fixed in RC2, but wasn't included in release notes.)
o LOG4J2-666: AsyncLoggerContextSelector should ensure that different AsyncLoggerContext
objects created by web app classloaders have unique names.
o LOG4J2-683: Fix annotation processor warnings on JDK 1.7+. Thanks to Jurriaan Mous.
o LOG4J2-694: Fix strange compilation error that popped up in a test class.
o LOG4J2-692: Update documentation to specify only Maven 3 is supported.
o LOG4J2-690: Log4j Web test dependencies should be in scope "test" in the pom. Thanks to
Philip Helger.
o LOG4J2-682: Special characters (tab and so on) in PatternLayout do not work. Thanks to
Scott Harrington.
o LOG4J2-686: Core's OptionConverter support for \b is broken (affects PatternLayout).
o LOG4J2-687: Rename org.apache.logging.log4j.core.util.Closer.closeSilent() to closeSilently().
o LOG4J2-688: Make org.apache.logging.log4j.core.layout.PatternLayout immutable.
o LOG4J2-707: Some exceptions are not logged when configuration problems are detected.
Changes:
o LOG4J2-685: Make org.apache.logging.log4j.core.layout.AbstractLayout immutable.
o LOG4J2-689: Update Jackson to 2.4.1.
o LOG4J2-709: Update Apache Commons Logging to 1.2 from 1.1.3.
Log4j 2.0 网页：http://logging.apache.org/log4j/2.x/
来自:开源中国社区
