Changes

Release 2.13.1 – 2019-02-25

Type	Changes	By
	Slow initialization on Windows due to accessing network interfaces. Fixes LOG4J2-2717.	rgoers
	Conditionally perform status logging calculations in PluginRegistry. Fixes LOG4J2-2789. Thanks to Marius Volkhart.	rgeors
	Prevent LoggerContext from being garbage collected while being created. Fixes LOG4J2-2756.	rgoers
	Do not log an error if Files.move does not work. Fixes LOG4J2-2769.	rgoers
	Rollover fails when file matches pattern but index is too large. Fixes LOG4J2-2039.	rgoers
	Counter stuck at 10 and overwriting files when leading zeros used in the file pattern count. Fixes LOG4J2-2784.	rgoers
	ClassLoaderContextSelector was not locating the LoggerContext during shutdown. Fixes LOG4J2-2746.	rgoers
	JSON output wrong when using additonal fields. Fixes LOG4J2-2652.	rgoers
	GraalVM does not allow use of MethodHandles. Fixes LOG4J2-2649.	rgoers
	Allow Lookup keys with leading dashes by using a slash as an escape character. Fixes LOG4J2-2211.	rgoers
	Use LinkedBlockingQueue instead of synchronized collction in StatusConfiguration. Fixes LOG4J2-2782.	rgoers
	ServletContainerInitializer was obtaining the StatusLogger too soon. Fixes LOG4J2-2781. Thanks to qxo.	rgoers
	PluginProcessor should use Messager instead of System.out. Fixes LOG4J2-2676. Thanks to Gregg Donovan.	rgoers
	MapMessage.getFormattedMesssage() would incorrectly format objects. Fixes LOG4J2-2703. Thanks to Volkan Yazici.	rgoers
	Always write header on a new OutputStream. Fixes LOG4J2-2760. Thanks to Christoph Kaser.	rgoers
	Add a retry count attribute to the KafkaAppender. Fixes LOG4J2-2777. Thanks to joongs4.	rgoers
	An error message in RollingFileAppender uses a placeholder for the name but does not specify the name argument in the logging call. Fixes LOG4J2-2776. Thanks to Christoph Kaser.	rgoers
	NullPointerException when using a custom DirectFileRolloverStrategy without a file name. Fixes LOG4J2-2758. Thanks to Christoph Kaser.	rgoers
	Add mulit-parameter overloads to LogBuilder. Fixes LOG4J2-2768. Thanks to Marius Volkhart.	rgoers
	Fixed NullPointerException after reconfiguring via JMX. Fixes LOG4J2-2770. Thanks to Bill Kuker.	rgoers
	RollingFileAppender was not rolling on startup if createOnDemand was set to true. Fixes LOG4J2-2759.	rgoers
	Warn if pattern is missing on Routes element. Use default route. Fixes LOG4J2-2767.	rgoers
	Fix lock contention in the classloader using new versions of slf4j without EventData on slf4j logger creation. Fixes LOG4J2-2415. Thanks to Andrey Turbanov.	ckozak
	Rollover handles parallel file deletion gracefully. Fixes LOG4J2-2677.	ckozak
	Remove unnecessary EventLogger references from log4j-slf4j18-impl due to removal from slf4j. Fixes LOG4J2-2744.	ckozak
	Update log4j-slf4j18-impl slf4j version to 1.8.0-beta4 from 1.8.0-alpha2. Fixes LOG4J2-2745.	ckozak
	Fix a memory leak using fully asynchronous logging when the queue is full using the 'discard' asynchronous queue full strategy. Fixes LOG4J2-2747.	ckozak
	Fix erroneous log4j-jul recursive logger detection resulting in some no-op JUL loggers and 'WARN Recursive call to getLogger' being reported by the status logger. Fixes LOG4J2-2739.	ckozak
	Implement ISO8601_PERIOD_MICROS fixed date format matching ISO8601_PERIOD with support for microsecond precision. Fixes LOG4J2-2748.	ckozak
	PluginCache output is reproducible allowing the annotation processor to produce deterministic results. Fixes LOG4J2-2735. Thanks to Andy Wilkinson.	ckozak
	Fix StackLocator.getCallerClass performance in cases where Reflection.getCallerClass is not accessible. Fixes LOG4J2-2751.	ckozak
	MutableLogEvent and RingBufferLogEvent avoid StringBuffer and parameter array allocation unless reusable messages are used. Fixes LOG4J2-2752.	ckozak
	LoaderUtil.getClassLoaders may discover additional loaders and no longer erroneously returns a result with a null element in some environments. Fixes LOG4J2-2754.	ckozak
	CronExpression.getBeforeTime() would sometimes return incorrect result. Fixes LOG4J2-2575. Thanks to Nathan Friess.	rgoers
	[JDBC] MS-SQL Server JDBC driver throws SQLServerException when inserting a null value for a VARBINARY column. Fixes LOG4J2-2762.	ggregory
	Update dependencies. Fixes LOG4J2-2763.	ggregory
	NullPointerException after reconfiguring via JMX. Fixes LOG4J2-2770. Thanks to Bill Kuker.	ggregory

Release 2.13.0 – 2019-12-11

Type	Changes	By
	Prevent recursive calls to java.util.LogManager.getLogger(). Fixes LOG4J2-2058.	rgoers
	LOG4J2-2725 - Added try/finally around event.execute() for RingBufferLogEventHandler to clear memory correctly in case of exception/error. Fixes LOG4J2-2725. Thanks to Dzmitry Anikechanka.	ckozak
	Wrong java version check in ThreadNameCachingStrategy. Fixes LOG4J2-2635. Thanks to Filipp Gunbin.	rgoers
	Use a less confusing name for the CompositeConfiguration source. Fixes LOG4J2-2674. Thanks to Anton Korenkov.	rgoers
	Add ThreadContext.putIfNotNull method. Fixes LOG4J2-2732. Thanks to Matt Pavlovich.	rgoers
	Add a Level Patttern Selector. Fixes LOG4J2-2731.	rgoers
	Update Jackson to 2.9.10. Fixes LOG4J2-2701.	rgoers
	Add setKey method to Kafka Appender Builder. Fixes LOG4J2-2727. Thanks to Clément Mathieu.	rogers
	ArrayIndexOutOfBoundsException could occur with MAC address longer than 6 bytes. Fixes LOG4J2-2707. Thanks to Christian Frank.	rgoers
	Add experimental support for Log4j 1 configuration files. Fixes LOG4J2-63.	rgoers
	The rolling file appenders would fail to compress the file after rollover if the file name matched the file pattern. Fixes LOG4J2-2712.	rgoers
	Add the ability to lookup Kubernetes attributes in the Log4j configuration. Allow Log4j properties to be retrieved from the Spring environment if it is available. Fixes LOG4J2-2716.	rgoers
	Allow Spring Boot application properties to be accessed in the Log4j 2 configuration. Add lower and upper case Lookups. Fixes LOG4J2-2710.	rgoers
	Allow message portion of GELF layout to be formatted using a PatternLayout. Allow ThreadContext attributes to be explicitly included or excluded in the GelfLayout. Fixes LOG4J2-2709.	rgoers
	@PluginValue does not support attribute names besides "value". Fixes LOG4J2-2693.	mattsicker
	Validation blocks definition of script in properties configuration. Fixes LOG4J2-2647.	mattsicker
	Set result of rename action to true if file was copied. Fixes LOG4J2-2680. Thanks to Guillermo Xavier Hurtado Garcia.	rgoers
	Add automatic module names where missing. Fixes LOG4J-2672. Thanks to Stephen Colebourne.	rgoers
	Add builder pattern to Logger interface. Fixes LOG4J2-2639.	rgoers
	OutputStreamAppender.Builder ignores setFilter(). Fixes LOG4J2-2673. Thanks to Yuichi Sugimura.	ggregory
	Prevent a memory leak when async loggers throw errors. Fixes LOG4J2-2725. Thanks to Dzmitry Anikechanka.	ckozak

Release 2.12.1 – 2019-08-06

Type	Changes	By
	Allow file renames to work when files are missing from the sequence. Fixes LOG4J2-1946. Thanks to Igor Perelyotov.	rgoers
	Support emulating a MAC address when using ipv6. Fixes LOG4J2-2650. Thanks to Mattia Bertorello.	rgoers
	Remove references to LoggerContext when it is shutdown. Fixes LOG4J2-2366.	rgoers
	Make Log4j Core optional for Log4j 1.2 API. Fixes LOG4J2-2556.	rgoers
	Improve the performance of capturing location information. Fixes LOG4J2-2644.	rgoers
	Update MongoDB 3 driver from 3.10.1 to 3.10.2. Fixes LOG4J2-2646.	ggregory
	Improve exception messages in the JDBC appender. Fixes LOG4J2-2657.	ggregory
	AbstractAction.reportException records a warning to the status logger, providing more information when file based appenders fail to compress rolled data asynchronously. Fixes LOG4J2-2658.	ckozak
	AbstractAction handles and records unchecked RuntimeException and Error in addition to IOException. Fixes LOG4J2-2659.	ckozak
	Retry when JDBC throws a java.sql.SQLTransactionRollbackException in commitAndClose(). Fixes LOG4J2-2660.	ggregory
	"Values not bound to statement" when using JDBC appender, appender does not respect bufferSize="0". Fixes LOG4J2-2667. Thanks to Gary Gregory, Edith Chui.	ggregory

Release 2.12.0 – 2019-06-23

Type	Changes	By
	RollingRandomAccessFileAppender error message referenced incorrect class name. Fixes LOG4J2-2547.	rgoers
	Restore constructor to ThrowablePatternConverter that was removed in 2.8.2. Fixes LOG4J2-2616.	rgoers
	StructuredDataId was ignoring maxLength atribute. Fixes LOG4J2-2622.	rgoers
	RFC5424Layout was not properly setting default Structured Element id for the MDC. Fixes LOG4J2-2636.	rgoers
	Allow zero padding the counter of a RollingFileAppender. Fixes LOG4J2-2403. Thanks to hupfdule.	rgoers
	Add filter that will match events when no marker is present. Fixes LOG4J2-2427. Thanks to Rimaljit Kaur.	rgoers
	Lookups were not found if the plugin key was not lowercase. Fixes LOG4J2-1143. Thanks to Pascal Heinrich.	rgoers
	Add reconfiguration methods to Configurator. Fixes LOG4J2-2406.	rgoers
	Locate plugins within a Jar using a URL Connection. Fixes LOG4J2-1852. Thanks to Tanner Altares.	rgoers
	Explicitly set file creation time. Fixes LOG4J2-2610.	rgoers
	JEP223 version detection fix for JDK 9 and up. Fixes LOG4J2-2561. Thanks to Ulrich Enslin.	rgoers
	FailoverAppender was failing with ERROR appender Failover has no parameter that matches element Failovers. Fixes LOG4J2-1103. Thanks to Seán Dunne.	rgoers
	Update file time when size based triggering policy is used without a time-based triggering policy. Fixes LOG4J2-2602.	rgoers
	Throw better exception message when both log4j-slf4j-impl and log4j-to-slf4j are present. Fixes LOG4J2-2597.	rgoers
	Add support for reconfiguration via HTTP(S), Docker, and Spring Cloud Configuration. Fixes LOG4J2-913.	rgoers
	TCP Appender should support a host name resolving to multiple IP addresses. Fixes LOG4J2-2586.	rgoers
	NullPointerException in JdbcAppender.createAppender(). Fixes LOG4J2-2559. Thanks to Li Lei, Gary Gregory.	ggregory
	Update tests from H2 1.4.197 to 1.4.199. Thanks to Gary Gregory.	ggregory
	Update Jackson from 2.9.7 to 2.9.8. Fixes LOG4J2-2570. Thanks to Gary Gregory.	ggregory
	Update MongoDB 3 module driver from 3.9.0 to 3.10.1. Fixes LOG4J2-2574. Thanks to Gary Gregory.	ggregory
	StackOverflowException when server not reachable with SocketAppender. Fixes LOG4J2-2592. Thanks to Dávid Kaya, Gary Gregory.	ggregory
	Allow custom end-of-line with JsonLayout. Fixes LOG4J2-2337. Thanks to Arvind Sahare, Patrice Ferrot.	ggregory
	GZIP compression on rollover supports configurable compression levels. Fixes LOG4J2-2598. Thanks to Carter Kozak.	ckozak
	java.lang.StackOverflowError at org.apache.logging.log4j.junit.AbstractExternalFileCleaner.println(AbstractExternalFileCleaner.java:169). Fixes LOG4J2-2598. Thanks to Gary Gregory.	ggregory
	MapPatternConverter is properly created from the '%K', '%map', and '%MAP' patterns. PatternConverter instanceOf methods with unknown parameter types no longer elide those with known parameters. Fixes LOG4J2-2564.	ckozak
	AsyncQueueFullPolicy configuration short values "Default" and "Discard" are case insensitive to avoid confusion. Fixes LOG4J2-2611.	ckozak
	NullPointerException at org.apache.logging.log4j.core.appender.db.jdbc.JdbcDatabaseManager.writeInternal(JdbcDatabaseManager.java:803). Fixes LOG4J2-2612.	ggregory
	Possible ClassCastException in org.apache.logging.log4j.core.script.ScriptManager.ScriptManager(Configuration, WatchManager). Fixes LOG4J2-2618.	ggregory
	Update Jackson from 2.9.8 to 2.9.9. Fixes LOG4J2-2619.	ggregory
	RoutingAppender PurgePolicy implementations no longer stop appenders referenced from the logger configuration, only those that have been created by the RoutingAppender. Note that RoutingAppender.getAppenders no longer includes entries for referenced appenders, only those which it has created. Fixes LOG4J2-2631.	ckozak
	Fix a race allowing events not to be recorded when a RoutingAppender purge policy attempts to delete an idle appender at exactly the same time as a new event is recorded. Fixes LOG4J2-2629.	ckozak
	Asynchronous logging when the queue is full no longer results in heavy CPU utilization and low throughput. Fixes LOG4J2-2606.	ckozak
	Refactor several AsyncLogger methods below the 35 byte threshold for inlining. Fixes LOG4J2-2634.	ckozak
	Add and use method org.apache.logging.log4j.message.MapMessage.toKey(String) for simpler subclasses. Fixes LOG4J2-2634.	ggregory

Release 2.11.2 – 2019-02-04

Type	Changes	By
	Document that Properties element must be the first configuration element. Fixes LOG4J2-2500.	rgoers
	Add Log4j-to-SLF4J to BOM pom.xml. Fixes LOG4J2-2543. Thanks to Dermot Hardy.	rgoers
	Use the file pattern as the FileManager "name" when no filename is present. Fixes LOG4J2-2061.	rgoers
	Expose LoggerContext.setConfiguration as a public method. Fixes LOG4J2-2009.	rgoers
	CronTriggeringPolicy was not rolling properly, especially when used with the SizeBasedTriggeringPolicy. Fixes LOG4J2-2542.	rgoers
	Load PropertySources from any accessible ClassLoader. Hide any exceptions that may occur accessing a PropertySource. Fixes LOG4J2-2266.	rgoers
	Logging with a lambda expression with a method call that also logs would cause logs within method call to reference line num and method name of the parent method. Fixes LOG4J2-1570.	rgoers
	Switch from CLIRR to RevAPI for detecting API changes. Fixes LOG4J2-1576.	rgoers
	SizeBasedTriggeringPolicy was not honored when using the DirectWriteRolloverStrategy if the machine restarts. Fixes LOG4J2-2485. Thanks to Giovanni Matteo Fumarola.	rgoers
	Direct write was creating files with the wrong date/time. Fixes LOG4J2-1906.	rgoers
	Add Log4j-slf4j18-impl dependency to bom pom. Fixes LOG4J2-2453. Thanks to theit.	rgoers
	Configuration documentation referenced incorrect method name. Fixes LOG4J2-2515. Thanks to MakarovS.	rgoers
	Make Strings.toRootUpperCase a static method so it can be accessed. Fixes LOG4J2-2514. Thanks to smilebrian0515.	rgoers
	Fixed Appenders section in Extending Log4j. Fixes LOG4J2-1571. Thanks to torbenmoeller.	rgoers
	Improve exception logging performance. ThrowableProxy construction uses a faster method to discover the current stack trace. ThrowablePatternConverter and ExtendedThrowablePatternConverter default configurations no longer allocate an additional buffer for stack trace contents. Fixes LOG4J2-2391.	ckozak
	Predeployment of PersistenceUnit that using Log4j as session logger failed (#198). Fixes LOG4J2-2397. Thanks to EckelDong.	ggregory
	NameAbbreviator correctly abbreviates first fragments (#188). Fixes LOG4J2-2365. Thanks to Eugene Zimichev.	ckozak
	Fix memory leak in ReusableParameterizedMessage. Fixes LOG4J2-2201.	ckozak
	ReusableObjectMessage parameter is properly passed to appenders (#203). Fixes LOG4J2-2363. Thanks to Brian Laub.	ckozak
	NullPointerException when closing never used RollingRandomAccessFileAppender. Fixes LOG4J2-2418. Thanks to Jonas Rutishauser.	ggregory
	Handle some unchecked exceptions while loading plugins. Fixes LOG4J2-2422. Thanks to rswart, Gary Gregory.	ggregory
	Setting a null ErrorHandler on AbstractAppender is not allowed and will no-op as expected. Fixes LOG4J2-2441.	ckozak
	ErrorHandler is invoked with a LogEvent and Throwable when possible, where previously only a string was used. Fixes LOG4J2-2444.	ckozak
	Let the NullAppender default its name to "null". Fixes LOG4J2-2447.	ggregory
	Update Jackson from 2.9.6 to 2.9.7. Fixes LOG4J2-2468.	ggregory
	Update Apache Commons Compress from 1.17 to 1.18. Fixes LOG4J2-2469.	ggregory
	Update Apache Commons CSV from 1.5 to 1.6. Fixes LOG4J2-2470.	ggregory
	Update javax.mail from 1.6.1 to 1.6.2. Fixes LOG4J2-2471.	ggregory
	Update mongo-java-driver 3 from 3.8.0 to 3.8.2. Fixes LOG4J2-2472.	ggregory
	Exceptions are added to all columns when a JDBC Appender's ColumnMapping uses a Pattern. Fixes LOG4J2-2413. Thanks to Andres Luuk, Gary Gregory.	ggregory
	ColumnMapping literal not working. Fixes LOG4J2-2466. Thanks to Paolo Bonanomi, Gary Gregory.	ggregory
	AbstractStringLayoutStringEncodingBenchmark returns the computed variables on each benchmark to avoid DCE. Fixes LOG4J2-2478. Thanks to Diego Elias Costa.	ckozak
	StackOverflowError at AwaitCompletionReliabilityStrategy. Fixes LOG4J2-2134. Thanks to David del Amo Mateos, Gary Gregory.	ggregory
	Avoid NullPointerExceptions in org.apache.logging.log4j.core.config.AbstractConfiguration for null arguments. Fixes LOG4J2-2481.	ggregory
	RollingRandomAccessFileManager ignores new file patterns from programmatic reconfiguration. Fixes LOG4J2-2457. Thanks to Heiko Schwanke, Gary Gregory.	ggregory
	BasicContextSelector cannot be used in a OSGI application. Fixes LOG4J2-2482. Thanks to Rob Gansevles.	ggregory
	org.apache.log4j.SimpleLayout and ConsoleAppender missing in log4j-1.2-api. Fixes LOG4J2-2476. Thanks to Al Bundy.	ggregory
	JDBC Appender should release parameter resources ASAP. Fixes LOG4J2-2489.	ggregory
	Allow all Appenders to optionally carry a Property array. Fixes LOG4J2-2491.	ggregory
	JmsAppender reconnectIntervalMillis cannot be set from a configuration file. Fixes LOG4J2-2497.	ggregory
	JMS Appender may throw a NullPointerException when JMS is not up while the Appender is starting. Fixes LOG4J2-2499.	ggregory
	JDBC Appender should reconnect to the database when a connection goes stale. Fixes LOG4J2-2496.	ggregory
	Better handling of %highlight pattern when using jul-bridge. Fixes LOG4J2-2405. Thanks to Marco Herrn.	ggregory
	Update MongoDB driver from 3.8.2 to 3.9.0 for log4j-mongodb3 module. Fixes LOG4J2-2503.	ggregory
	Let JDBC PoolingDriverConnectionSource with Apache Commons DBCP configure a PoolableConnectionFactory. Fixes LOG4J2-2505.	ggregory
	JDBC Appender fails when using both parameter, source, and literal ColumnMapping elements. Fixes LOG4J2-2508.	ggregory
	Allow a JDBC Appender to truncate strings to match a table's metadata column length limit. Fixes LOG4J2-2509.	ggregory
	PatternLayout %date conversion pattern should render time zone designator for ISO-ISO8601. Fixes LOG4J2-1246.	ggregory
	Prevent ConcurrentModificationException while iterating over ListAppender events. Fixes LOG4J2-2527.	ckozak
	Fix regression using MapMessageLookup.lookup with MapMessages that do not implement StringMapMessage. Fixes LOG4J2-2522. Thanks to Adam Lesiak.	ckozak
	Generalize checks using MapMessage implementations with do not extend StringMapMessage. Introduce new JAVA_UNQUOTED MapMessage format type based on the JAVA formatting, but without quoted values. Fixes LOG4J2-2530. Thanks to Travis Spencer.	ckozak
	Fix a regression introduced by LOG4J2-2301 in 2.11.1 allowing allocation to occur in AsyncLoggerConfig. Fixes LOG4J2-2533. Thanks to Michail Prusakov.	ckozak

Release 2.11.1 – 2018-07-22

Type	Changes	By
	ThrowableProxy was saving and retrieving cache entries using different keys. Fixes LOG4J2-2389. Thanks to Liu Wen.	rgoers
	If root LoggerConfig does not have a Level return ERROR. Fixes LOG4J2-2316.	rgoers
	Fix broken links in log4j web documentation. Fixes LOG4J2-2390. Thanks to anton-balaniuc.	rgoers
	Allow composite configuration for context parameter. Fixes LOG4J2-1721. Thanks to Phokham Nonava.	rgoers
	The OSGi Activator specified an incorrect version. Fixes LOG4J2-2343. Thanks to Raymond Augé.	rgoers
	Make java.util.ServiceLoader properly work in OSGi by using the Service Loader Mediator Specification. Fixes LOG4J2-2305. Thanks to Björn Kautler.	rgoers
	Split the SLF4J binding into 2 implementations - one for SLF4J 1.7.x and one for SLF4J 1.8+. Fixes LOG4J2-2305.	rgoers
	Improve plugin error message when elements are missing. Fixes LOG4J2-2268. Thanks to Tilman Hausherr.	rgoers
	ParserConfigurationException when using Log4j with oracle.xml.jaxp.JXDocumentBuilderFactory. Fixes LOG4J2-2283. Thanks to Vishnu Priya Matha.	ggregory
	PoolingDriverConnectionSource does not take into account properties, user name, and password. Fixes LOG4J2-2300.	ggregory
	Status logger should show the Log4j name and version when initializing itself. Fixes LOG4J2-2302.	ggregory
	Log4j2 2.8.2 JMX unregister NullPointerException. Fixes LOG4J2-2304. Thanks to wumengsheng.	ggregory
	Update Jackson from 2.9.4 to 2.9.5. Fixes LOG4J2-2311.	ggregory
	Update LMAX Disruptor from 3.3.7 to 3.4.2. Fixes LOG4J2-2313.	ggregory
	Log4j 2.0 ERROR "Could not search jar" with JBoss EAP 6.2. Fixes LOG4J2-548. Thanks to Shehata, Paresh Varke, Eric Victorson, Martin Laforet.	ggregory
	MutableLogEvent and RingBufferLogEvent message mementos retain the original format string. Fixes LOG4J2-2307.	ckozak
	Curly braces in parameters are not treated as placeholders. Fixes LOG4J2-2032. Thanks to Kostiantyn Shchepanovskyi.	ckozak
	MutableLogEvent.getNonNullImmutableMessage and Log4jLogEvent.makeMessageImmutable retain format and parameters. Fixes LOG4J2-2317.	ckozak
	Messages are no longer mutated when the asynchronous queue is full. A warning is logged to the status logger instead. Fixes LOG4J2-2318.	ckozak
	Fix NPE in AbstractLogger when another exception is thrown, masking the root cause. Fixes LOG4J2-2320.	ckozak
	AsyncLogger uses the correct level when unspecified. This provides parity between AsyncLogger and Logger. Fixes LOG4J2-2321.	ckozak
	Custom ContextSelector implementations which select an AsyncLoggerContext disable LoggerConfig.includeLocation by default for parity with AsyncLoggerContextSelector. Fixes LOG4J2-2322.	ckozak
	MutableLogEvent references to other objects are cleared after each use. Fix a memory leak causing references to parameters to be held after synchronous logging with thread locals enabled. Fixes LOG4J2-2269.	ckozak
	Update JAnsi from 1.17 to 1.17.1. Fixes LOG4J2-2328.	ggregory
	Mixed async loggers no longer forget parameter values, providing some appenders with an array of nulls. Fixes LOG4J2-2301.	ckozak
	RollingFileManager debug logging avoids string concatenation and errant braces in favor of parameterized logging. Fixes LOG4J2-2331. Thanks to Mike Baranski.	ckozak
	Handle errors thrown in default disruptor ExceptionHandler implementations to avoid killing background threads. Fixes LOG4J2-2333.	ckozak
	Add API org.apache.logging.log4j.core.appender.AsyncAppender.getQueueSize(). Fixes LOG4J2-2334.	ggregory
	Remove duplicate hyphen from the AsyncLoggerConfig background thread name. Fixes LOG4J2-2336.	ckozak
	Update Apache Commons Compress from 1.16.1 to 1.17. Fixes LOG4J2-2347.	ggregory
	Added AbstractLogEvent.getMutableInstant to allow the MutableInstant instance to be modified by classes extending AbstractLogEvent. Fixes LOG4J2-2351.	ckozak
	RingBufferLogEvent memento messages provide the expected format string, and no longer attempt to substitute parameters into curly braces in parameter toString values. Both RingBufferLogEvent and MutableLogEvent memento implementations memoize results to avoid rebuilding formatted string values. Fixes LOG4J2-2352.	ckozak
	PropertiesUtil ignores non-string system properties. Fixes a NoClassDefFoundError initializing StatusLogger caused by an NPE while initializing the static PropertiesUtil field. Fixes LOG4J2-2355. Thanks to Henrik Brautaset Aronsen.	ckozak
	Update Jackson from 2.9.5 to 2.9.6. Fixes LOG4J2-2357.	ggregory
	Update Kafka client from 1.0.0 to 1.1.0. Fixes LOG4J2-2358.	ggregory
	Fixed a memory leak in which ReusableObjectMessage would hold a reference to the most recently logged object. Fixes LOG4J2-2362.	ckozak
	Jackson layouts used with AsyncLoggerContextSelector output the expected format rather than only a JSON string of the message text. Fixes LOG4J2-2312.	ckozak
	Fixed a memory leak in which ReusableParameterizedMessage would hold a reference to the most recently logged throwable and provided varargs array. Fixes LOG4J2-2364.	ckozak
	Nested logging doesn't clobber AbstractStringLayout cached StringBuidlers. Fixes LOG4J2-2368.	ckozak
	StringBuilders.escapeJson implementation runs in linear time. Escaping large JSON strings in EncodingPatternConverter and MapMessage will perform significantly better. Fixes LOG4J2-2373. Thanks to Kevin Meurer.	ckozak
	StringBuilders.escapeXml implementation runs in linear time. Escaping large XML strings in EncodingPatternConverter and MapMessage will perform significantly better. Fixes LOG4J2-2376. Thanks to Kevin Meurer.	ckozak
	NullPointerException in org.apache.logging.log4j.util.LoaderUtil.getClassLoaders() when using Bootstrap class loader. Fixes LOG4J2-2377. Thanks to Mirko Rzehak, Gary Gregory.	ggregory
	Update Mongodb 3 driver from 3.6.3 to 3.8.0. Fixes LOG4J2-2382.	ggregory
	Update Kafka client from 1.1.0 to 1.1.1. Fixes LOG4J2-2384.	ggregory
	Update Groovy from 2.4.13 to 2.5.1. Fixes LOG4J2-2385.	ggregory
	Update optional Apache Commons DBCP from 2.2.0 to 2.4.0. Fixes LOG4J2-2386.	ggregory
	Thread indefinitely blocked when logging a message in an interrupted thread. Fixes LOG4J2-2388. Thanks to Failled.	ggregory

Release 2.11.0 – 2018-03-11

Type	Changes	By
	LoaderUtil was not looping properly over classloaders. Fixes LOG4J2-2104.	rgoers
	Revert OSGi API version to 4.3.1. Fixes LOG4J2-1976.	rgoers
	Documentation fix in manual page for custom configurations. Fixes LOG4J2-2273. Thanks to Bruno P. Kinoshita.	rpopma
	Reusable LogEvents now pass the original format string to downstream components like layouts and filters. Fixes LOG4J2-2252. Thanks to Carter Kozak.	rpopma
	Add API to enable iterating over message parameters without creating temporary objects. Fixes LOG4J2-2253. Thanks to Carter Kozak.	rpopma
	Move module-info.class to META-INF/versions/9 directory. Fixes LOG4J2-2271.	rgoers
	Incorrect automatics module name header was being included in manifests. Fixes LOG4J2-2254.	rgoers
	NullPointerException would occur when header was provided to a Layout on RollingRandingAccessFileAppender with DirectWriteRolloverStrategy. Fixes LOG4J2-2247.	rgoers
	The internal status logger timestamp format is now configurable with system property `log4j2.StatusLogger.DateFormat`. Fixes LOG4J2-2250.	rpopma
	Removed unnecessary dependency on jcommander since Log4j uses embedded picocli since 2.9. Fixes LOG4J2-2236.	rpopma
	Added support for precise (micro and nanosecond) timestamps when running on Java 9. A limited number of precise %d date formats are supported with PatternLayout. POTENTIAL BREAKING CHANGE: The XML, JSON and YAML formats have changed: they no longer have the "timeMillis" attribute and instead have an "Instant" element with "epochSecond" and "nanoOfSecond" attributes. Fixes LOG4J2-1883. Thanks to Anthony Maire.	rpopma
	Output JSON object for ObjectMessage in JsonLayout. Fixes LOG4J2-2190. Thanks to Franz Wong.	mikes
	Made log4j-core a multi-release ("multi-version") jar, added log4j-core-java9 module. Fixes LOG4J2-2191.	rpopma
	Log4j2 throws NoClassDefFoundError in Java 9 in java.util.ServiceLoader. Fixes LOG4J2-2129. Thanks to Blazej Bucko.	rgoers
	Fixed bug where ThreadContext map was cleared, resulting in entries being only available for one log event. Fixes LOG4J2-2158. Thanks to Björn Kautler.	rpopma
	Avoid null attribute values in DefaultConfigurationBuilder. Fixes LOG4J2-2002. Thanks to Paul Burrowes.	mikes
	Fix typo in Property Substitution docs. Fixes LOG4J2-2175. Thanks to Behrang Saeedzadeh.	mikes
	Allow SortedArrayStringMap to be filtered upon deserialization. Fix build error in Java 9 when compiling log4j-core test classes. Fixes LOG4J2-2163.	rgoers
	Don't create exit message in traceExit(R) when logging is disabled. Fixes LOG4J2-2157. Thanks to Malte Skoruppa.	ggregory
	DefaultMergeStrategy did not merge filters on loggers correctly. Fixes LOG4J2-2123. Thanks to Jacob Tolar.	rgoers
	Update version of maven bundle plugin to 3.4.0. Convert bundle plugin error to a warning. Fixes LOG4J2-2146.	rgoers
	Reduce compiler warnings in log4j-api. Fixes LOG4J2-2215.	rpopma
	Add missing converters to PatternLayout. Fixes LOG4J2-2143.	mikes
	Add API org.apache.logging.log4j.core.lookup.Interpolator.getStrLookupMap(). Fixes LOG4J2-2160.	ggregory
	Removed unnecessary threadlocal StringBuilder field from MdcPatternConverter. Fixes LOG4J2-2127. Thanks to Carter Kozak.	rpopma
	Removed compile-time dependency on Java Management APIs from Log4J API module to improve compatibility with Android Platform which does not support JMX extensions. Fixes LOG4J2-2126. Thanks to Oleg Kalnichevski.	rpopma
	Require Java 9 to compile the log4j-perf module to allow benchmarking with Java 9 APIs. Fixes LOG4J2-2194.	rpopma
	Update JMH to version 1.19 from 1.1.1. Fixes LOG4J2-2193.	rpopma
	Update ZeroMQ's jeromq from 0.4.2 to 0.4.3. Fixes LOG4J2-2132.	ggregory
	Update Jackson from 2.9.2 to 2.9.3. Fixes LOG4J2-2165.	ggregory
	The MongoDB Appender should use a keys and values for a Log4j MapMessage. Fixes LOG4J2-2179.	ggregory
	Add a MongoDbProvider builder for and deprecate org.apache.logging.log4j.mongodb.MongoDbProvider.createNoSqlProvider(). Fixes LOG4J2-2180.	ggregory
	The JDBC Appender should use keys and values from a Log4j MapMessage. Fixes LOG4J2-2181.	ggregory
	Update MongoDB driver from 3.0.4 to 3.6.1. Fixes LOG4J2-2184.	ggregory
	Add a simple JDBC DriverManager-based ConnectionSource that uses JDBC's DriverManager#getConnection(String, String, String). Fixes LOG4J2-2185.	ggregory
	Document default property value support. Fixes LOG4J2-2197. Thanks to Fabrice Daugan.	ggregory
	Update MongoDB dependencies from classic to modern. Fixes LOG4J2-2198.	ggregory
	Add a JDBC ConnectionSource that provides pooling through Apache Commons DBCP 2. Fixes LOG4J2-2186.	ggregory
	Add a hook for a Connection Source for a JDBC Appender to release its resources. Fixes LOG4J2-2187.	ggregory
	Add org.apache.logging.log4j.core.util.WatchManager#unwatch(File). Fixes LOG4J2-2203.	ggregory
	org.apache.logging.log4j.core.util.WatchManager.getWatchers() should pre-allocate its new Map. Fixes LOG4J2-2204.	ggregory
	Add method org.apache.logging.log4j.core.util.WatchManager.reset(File) and reset(). Fixes LOG4J2-2206.	ggregory
	Add debug logging to org.apache.logging.log4j.mongodb.MongoDbConnection. Fixes LOG4J2-2208.	ggregory
	Rename existing MongoDb plugin and related artifacts from MongoDb to MongoDb2. Fixes LOG4J2-2209.	ggregory
	Fix error log message for Script which says ScriptFile instead. Fixes LOG4J2-2210. Thanks to Björn Kautler.	ggregory
	Unnecessary contention in CopyOnWriteSortedArrayThreadContextMap. Fixes LOG4J2-2212. Thanks to Daniel Feist, Gary Gregory.	ggregory
	Unnecessary contention in GarbageFreeSortedArrayThreadContextMap. Fixes LOG4J2-2213. Thanks to Daniel Feist, Gary Gregory.	ggregory
	Unnecessary contention in DefaultThreadContextMap. Fixes LOG4J2-2214. Thanks to Daniel Feist, Gary Gregory.	ggregory
	NullPointerException at org.apache.logging.log4j.util.Activator.loadProvider(Activator.java:81) in log4j 2.10.0. Fixes LOG4J2-2182. Thanks to liwenxian2017, Gary Gregory.	ggregory
	MarkerFilter onMismatch invalid attribute in .properties. Fixes LOG4J2-2202. Thanks to Kilian, Gary Gregory.	ggregory
	Configuration builder classes should look for "onMismatch", not "onMisMatch". Fixes LOG4J2-2219. Thanks to Kilian, Gary Gregory.	ggregory
	New module log4j-mongodb3: Remove use of deprecated MongoDB APIs and code to the Java driver version 3 API. Fixes LOG4J2-2205. Thanks to Gary Gregory.	ggregory
	Split off JPA support into a new module log4j-jpa. Fixes LOG4J2-2188. Thanks to Gary Gregory.	ggregory
	Update Jackson from 2.9.3 to 2.9.4. Fixes LOG4J2-2229. Thanks to Gary Gregory.	ggregory
	Cannot see or copy all of certain JAnsi exception messages on Windows due to NUL characters. Fixes LOG4J2-2243. Thanks to Gary Gregory.	ggregory
	Update Apache Commons Compress from 1.15 to 1.16.1. Fixes LOG4J2-2245. Thanks to Gary Gregory.	ggregory
	Update MongoDB 3 module from driver 3.6.1 to 3.6.3. Fixes LOG4J2-2259.	ggregory
	[SMTP] Update javax.mail from 1.6.0 to 1.6.1. Fixes LOG4J2-2260.	ggregory
	Update JAnsi from 1.16 to 1.17. Fixes LOG4J2-2264.	ggregory
	Strings::join, when called with [null] returns "null" instead of EMPTY. Fixes LOG4J2-2270. Thanks to Cyril Martin.	ggregory
	ConcurrentModificationException from org.apache.logging.log4j.status.StatusLogger.<clinit>(StatusLogger.java:71). Fixes LOG4J2-2276. Thanks to Sean Baxter.	ggregory
	Allow EnvironmentPropertySource to run with a SecurityManager that rejects environment variable access. Fixes LOG4J2-2274. Thanks to Sebastien Lannez.	ggregory
	Allow SystemPropertiesPropertySource to run with a SecurityManager that rejects system property access. Fixes LOG4J2-2279. Thanks to Gary Gregory.	ggregory

Release 2.10.0 – 2017-11-18

Type	Changes	By
	XML Schema for DynamicFilterThreshold does not accept multiple KeyValuePairs. Fixes LOG4J2-2289. Thanks to Hari Menon.	ggregory
	Properly escape newlines and other control characters in JSON. Fixes LOG4J2-2120. Thanks to Carter Douglas Kozak.	mikes
	Add property to disable message pattern converter lookups. Fixes LOG4J2-2109. Thanks to Carter Douglas Kozak.	mikes
	MapMessage should use deep toString for values. Fixes LOG4J2-2112. Thanks to Carter Douglas Kozak.	mikes
	MapMessage supports both StringBuilderFormattable and MultiformatMessage. Fixes LOG4J2-2107. Thanks to Carter Douglas Kozak.	mikes
	MapMessage JSON encoding will escape keys and values. Fixes LOG4J2-2102. Thanks to Carter Douglas Kozak.	mikes
	Non-string value in MapMessage caused ClassCastException. Fixes LOG4J2-2101. Thanks to Carter Douglas Kozak.	mikes
	XML encoding for PatternLayout. Fixes LOG4J2-2103.	mikes
	Provide a native Log4j 2 implementation of Eclipse Jetty's org.eclipse.jetty.util.log.Logger. Fixes LOG4J2-2114.	ggregory
	Allow filtering of line breaks in layout pattern. Fixes LOG4J2-1203. Thanks to Robert Turner.	mikes
	Add a noop AppenderSkeleton for applications still using Log4j 1.x. Fixes LOG4J2-2098.	rgoers
	Log4j respects the configured "log4j2.is.webapp" property. Fixes LOG4J2-2091. Thanks to Carter Douglas Kozak.	mikes
	LevelMixIn class for Jackson is coded incorrectly. Fixes LOG4J2-2100.	ggregory
	Jansi now needs to be enabled explicitly (by setting system property `log4j.skipJansi` to `false`). To avoid causing problems for web applications, Log4j will no longer automatically try to load Jansi without explicit configuration. Fixes LOG4J2-2087. Thanks to Andy Gumbrecht.	rpopma
	AbstractDatabaseManager should make a copy of LogEvents before holding references to them: AsyncLogger log events are mutable. Fixes LOG4J2-2060.	rpopma
	Split up log4j-nosql into one module per appender. Fixes LOG4J2-2076.	mikes
	Upgrade picocli to 2.0.3 from 0.9.8. Fixes LOG4J2-2088.	rpopma
	Add possibility of sending the key of a message to Kafka using KafkaAppender. Fixes LOG4J2-2062. Thanks to Jorge Sanchez.	mikes
	Modularize Log4j-api and make most other log4j jars automatic modules. Fixes LOG4J2-2056.	rgoers
	Simplify log4j system property naming scheme. Fixes LOG4J2-1431.	mattsicker
	Add global configuration environment SPI. Fixes LOG4J2-1809.	mattsicker
	Provide support for overriding the Tomcat Log class in Tomcat 8.5+. Fixes LOG4J2-2025.	rgoers
	Add fields with fixed values to JSON/XML/YAML layouts. Fixes LOG4J2-1694. Thanks to Michal Dvořák.	mikes
	Provide ways to configure SSL that avoid plain-text passwords in the log4j configuration. The configuration may now specify a system environment variable that holds the password, or the path to a file that holds the password. Fixes LOG4J2-2054.	rpopma
	Support new SLF4J binding mechanism introduced in SLF4J 1.8. Fixes LOG4J2-2057.	rgoers
	Disable thread name caching by default when running on Java 8u102 or later. Fixes LOG4J2-2052.	rpopma
	If Log4j is used as the Tomcat logging implementation startup might fail if an application also uses Log4j. Fixes LOG4J2-2055.	rgoers
	Update classes in org.apache.logging.log4j.core.net.ssl in APIs from String to a PasswordProvider producing char[] for passwords. Fixes LOG4J2-1896.	rpopma
	Until this change, messages appeared out of order in log file any time when the async logging queue was full. With this change, messages are only logged out of order to prevent deadlock when Log4j2 detects recursive logging while the queue is full. Fixes LOG4J2-2031.	rpopma
	Exception java.nio.charset.UnsupportedCharsetException: cp65001 in 2.9.0. Fixes LOG4J2-2053.	ggregory
	Nested pattern layout options broken. Fixes LOG4J2-1216. Thanks to Thies Wellpott, Barna Zsombor Klara, GFriedrich.	ggregory
	Log4j1XmlLayout does not provide the entire stack trace, it is missing the caused by information. Fixes LOG4J2-2070. Thanks to Doug Hughes.	ggregory
	CompositeConfiguration supports Reconfiguration. PR #115. Fixes LOG4J2-2036. Thanks to Robert Haycock.	ggregory
	Add org.apache.logging.log4j.core.config.composite.CompositeConfiguration#toString(). Fixes LOG4J2-2071. Thanks to Carter Kozak.	ggregory
	Log4j-config.xsd should make AppenderRef optional for each Logger element. Fixes LOG4J2-2073. Thanks to Patrick Lucas.	ggregory
	The console appender should say why it cannot load JAnsi. Fixes LOG4J2-2074.	ggregory
	Wrong Apache Commons CSV version referenced in the Javadoc of CsvParameterLayout. Fixes LOG4J2-2085. Thanks to István Neuwirth.	ggregory
	Update LMAX disruptor from 3.3.6 to 3.3.7. Fixes LOG4J2-2078.	ggregory
	Update Apache Commons Compress from 1.14 to 1.15. Fixes LOG4J2-2081.	ggregory
	[TagLib] Update servlet-api provided dependency from 2.5 to 3.0.1. Fixes LOG4J2-2089.	ggregory
	Update Apache Kafka kafka-clients from 0.11.0.1 to 1.0.0. Fixes LOG4J2-2096.	ggregory
	Update from Jackson 2.9.1 to 2.9.2. Fixes LOG4J2-2077.	ggregory
	Jackson dependencies for 2.9.2 incorrectly bring in jackson-annotations 2.9.0 instead of 2.9.2. Fixes LOG4J2-2117.	ggregory

Release 2.9.1 – 2017-09-17

Type	Changes	By
	Prevent ConcurrentModificationException with AsyncLoggerConfig. Fixes LOG4J2-1988.	rpopma
	Prevent ConcurrentModificationException with AsyncLoggerConfig. Fixes LOG4J2-1914.	rpopma
	Increase default queue size for AsyncAppender from 128 to 1024. Fixes LOG4J2-2048.	rpopma
	Fix documentation to clarify disruptor-3.3.4 is now required for async loggers (previously the docs referred to disruptor-3.3.3 which was never released). Fixes LOG4J2-2035.	rpopma
	Inspect all known ClassLoaders to locate the service provider. Fixes LOG4J2-2030.	rgoers
	Java 9 StackLocator was not properly skipping the initial stack frames. Fixes LOG4J2-2028. Thanks to Jason Tedor.	rgoers
	Use a class' canonical name instead of name to create its logger name. Fixes LOG4J2-2023.	ggregory
	java.lang.AbstractMethodError: javax.xml.parsers.DocumentBuilderFactory.setFeature(). Fixes LOG4J2-2026. Thanks to Leon Finker.	ggregory
	Marker examples should not use deprecated flow APIs. Fixes LOG4J2-2029. Thanks to Fabrizio Cucci.	ggregory
	ClassNotFoundException when making all loggers asynchronous under OSGi environment. Fixes LOG4J2-1936. Thanks to Helber Belmiro.	ggregory
	Update Jackson from 2.9.0 to 2.9.1 (fix for Java 9.). Fixes LOG4J2-2043.	ggregory
	Update Apache Commons CSV from 1.4 to 1.5. Fixes LOG4J2-2044.	ggregory
	Update javax.mail from 1.5.6 to 1.6.0. Fixes LOG4J2-2045.	ggregory
	Update Apache Commons Compress from 1.13 to 1.14. Fixes LOG4J2-2046.	ggregory
	Update Cassandra driver from 3.1.0 to 3.1.4. Fixes LOG4J2-2047.	ggregory
	Update Apache Kafka Client from 0.11.0.0 to 0.11.0.1. Fixes LOG4J2-2049.	ggregory

Release 2.9.0 – 2017-08-26

Type	Changes	By
	Add support for DirectWriteRolloverStrategy to RollingRandomAccessFileAppender. Fixes LOG4J2-1928.	rgoers
	Prevent NullPointerException when a file name is specified with the DirectWriteRolloverStrategy. Fixes LOG4J2-1833.	rgoers
	RFC5424Layout now prints the process id. Fixes LOG4J2-2022.	rgoers
	Remove default layout from KafkaAppender. Fixes LOG4J2-2020.	mikes
	Fix incorrect documentation for LoggerNameLevelRewritePolicy. Fixes LOG4J2-2018.	rpopma
	Parameter of mdcId in SyslogAppender has no default value. Fixes LOG4J2-922. Thanks to angus.aqlu, Paul Burrowes.	ggregory
	StyleConverter.newInstance argument validation is incorrect. Fixes LOG4J2-2001. Thanks to Paul Burrowes.	ggregory
	HighlightConverter converts all unrecognized levels to DEBUG. Fixes LOG4J2-1999. Thanks to Paul Burrowes.	ggregory
	SslSocketManager does not apply SSLContext on TCP reconnect. Fixes LOG4J2-2013. Thanks to Taylor Patton, Gary Gregory.	ggregory
	Use a class' canonical name instead of name to create its logger name. Fixes LOG4J2-2023.	ggregory
	Allow KeyStoreConfiguration and TrustStoreConfiguration to find files as resources. Fixes LOG4J2-2015.	ggregory
	Replace JCommander command line parser with picocli to let users run Log4j2 utility applications without requiring an external dependency. Fixes LOG4J2-2011.	rpopma
	Support printing multiple StructuredData elements in RFC5424Layout. Fixes LOG4J2-2008.	rgoers
	Public API for parsing the output from JsonLayout/XmlLayout/YamlLayout into a LogEvent. Fixes LOG4J2-1986.	mikes
	Allow maxLength of StructuredData to be specified by the user. Fixes LOG4J2-1984.	rgoers
	Allow for bufferSize=0 in SMTP appender. Fixes LOG4J2-1071. Thanks to Ben Ludkiewicz, Benjamin Jaton.	ggregory
	JsonLayout, XmlLayout and YamlLayout support 0-byte termination of log events. Fixes LOG4J2-1981.	mikes
	Support capped collections for MongoDb appender. Fixes LOG4J2-1864. Thanks to Matthias Kappeller.	mattsicker
	Mark FileRenameAction as successful when using alternative ways to move files. Fixes LOG4J2-2016. Thanks to Benjamin Jaton.	ggregory
	No compression when using a separate drive in Linux. Fixes LOG4J2-2012. Thanks to Benjamin Jaton.	ggregory
	Log4j throws a java.nio.charset.UnsupportedCharsetException: cp65001. Fixes LOG4J2-1888. Thanks to Misagh Moayyed.	ggregory
	ConcurrentModificationException logging a parameter of type Map. Fixes LOG4J2-1990. Thanks to Philippe Mouawad.	ggregory
	SocketAppender will lose several events after re-connection to server. Fixes LOG4J2-1311. Thanks to Xibing Liang.	ggregory
	Consider the StringBuilder's capacity instead of content length when trimming. Fixes LOG4J2-1977. Thanks to Jerry xnslong.	ggregory
	Register log4j-core as an OSGi service. Skip tests for LOG4J2-1766 on MacOS. Use group "staff" for LOG4J2-1699 test on MacOS. Fixes LOG4J2-1971.	rgoers
	TcpSocketServer does not close accepted Sockets. Fixes LOG4J2-1994.	ggregory
	Log4J JUL Bridge and RMI Security Manager causes access denied ("java.util.logging.LoggingPermission" "control"). Fixes LOG4J2-1987. Thanks to Andreas Felder.	ggregory
	Log4j-config.xsd only allows one AppenderRef element for each Logger element. Fixes LOG4J2-1982. Thanks to Christoph Lembeck.	ggregory
	Fix default buffer size to match documentation (from 8102 to 8192 a.k.a. 8KB.). Fixes LOG4J2-1985. Thanks to Kenneth McFarland.	ggregory
	Log4j2 will now print all internal logging to the console if system property `log4j2.debug` is defined with any value (or no value). Fixes LOG4J2-1813.	rpopma
	Async Loggers no longer use deprecated LMAX Disruptor APIs. (Disruptor-3.3.3 or higher is now required.). Fixes LOG4J2-1261.	rpopma
	Improved error message when misconfigured with multiple incompatible appenders targeting same file. Fixes LOG4J2-1908.	rpopma
	Configurations with multiple root loggers now fail loudly. Fixes LOG4J2-1954.	rpopma
	Deprecate SerializedLayout and remove it as default. Fixes LOG4J2-1958.	mikes
	Disable DTD processing in XML configuration files. Fixes LOG4J2-1959.	mikes
	Temporary compress directory during rollover (#88). Fixes LOG4J2-1766. Thanks to Pierrick HYMBERT.	ggregory
	Fix docker build with jdk9 requirements (#84). Fixes LOG4J2-1950. Thanks to Pierrick HYMBERT.	ggregory
	Add more detail to WARN "Ignoring log event" messages printed to the console after log4j was shut down. Fixes LOG4J2-1801.	rpopma
	Added wrapper classes CustomLoggerGenerator and ExtendedLoggerGenerator to avoid class name with a dollar ($) character which has special meaning in many *nix command line environments. Fixes LOG4J2-1814.	rpopma
	Added process ID (pid) pattern converter. Fixes LOG4J2-1884.	rpopma
	Facilitate log4j use in Android applications: remove dependency on RMI and Management APIs from log4j-api. Fixes LOG4J2-1926.	rpopma
	Configurable Log File Permissions with PosixFilePermission. Fixes LOG4J2-1699. Thanks to Demetrios Dimatos, Pierrick HYMBERT.	ggregory
	Generate source jas for all test jars. Fixes LOG4J2-1945.	ggregory
	JMS Appender does not know how to recover from a broken connection. Fixes LOG4J2-1934.	ggregory
	JMS Appender should be able connect to a broker (later) even it is not present at configuration time. Fixes LOG4J2-1955.	ggregory
	JMS Appender broker password should be a char[], not a String. Fixes LOG4J2-1956.	ggregory
	Added methods ::writeBytes(ByteBuffer) and ::writeBytes(byte[], int, int) to ByteBufferDestination interface and use these methods in TextEncoderHelper where possible to prepare for future enhancements to reduce lock contention. Fixes LOG4J2-1874. Thanks to Roman Leventov.	rpopma
	CompositeConfiguration logs warning "Unable to determine URI for configuration." However, the reconfiguration is completed. Fixes LOG4J2-1912. Thanks to R Ri.	ggregory
	Dynamic reconfiguration does not work for filePattern of RollingFile. Fixes LOG4J2-1964. Thanks to Pierrick HYMBERT.	ggregory
	Reconfigure breaks DirectWriteRolloverStrategy. Fixes LOG4J2-1961. Thanks to Christian Vent.	ggregory
	The eventPrefix attribute was being ignored in the RFC5424Layout. Fixes LOG4J2-1943.	rgoers
	JndiManager is not released when the JmsAppender builder catches an exception trying to build itself. Fixes LOG4J2-1953.	ggregory
	Improve the documentation of the DynamicThresholdFilter. Fixes LOG4J2-1911.	rgoers
	EOFException with FormattedMessage. Fixes LOG4J2-1929. Thanks to Borys Sokolov.	ggregory
	Trim levels read from properties file to remove trailing spaces. Fixes LOG4J2-1948. Thanks to Michael Lück.	ggregory
	ClassCastException: org.eclipse.osgi.internal.loader.SystemBundleLoader$1 cannot be cast to java.lang.ClassLoader. Fixes LOG4J2-1971. Thanks to liwenxian2017.	ggregory
	Generic HTTP appender. Fixes LOG4J2-1442.	mikes
	Add with(String, primitive) methods to org.apache.logging.log4j.message.MapMessage. Fixes LOG4J2-1935.	ggregory
	Add forEach() methods to org.apache.logging.log4j.message.MapMessage. Fixes LOG4J2-1930.	ggregory
	Add containsKey() methods to org.apache.logging.log4j.message.MapMessage. Fixes LOG4J2-1932.	ggregory
	Support using java.util.ServiceLoader to locate Log4j 2 API providers. Fixes LOG4J2-1917.	rgoers
	Include separator option of PatternLayout in manual (and other updates). Fixes LOG4J2-1966. Thanks to M Sazzadul Hoque.	ggregory
	Support null byte delimiter in GelfLayout. Fixes LOG4J2-1854. Thanks to Xavier Jodoin.	mikes
	Add support for Java 9 StackWalker. Fixes LOG4J2-1359.	rgoers
	Warn when a configuration file for an inactive ConfigurationFactory is found. Fixes LOG4J2-1880.	mikes
	Add an optional random delay in TimeBasedTriggeringPolicy. Fixes LOG4J2-1855. Thanks to Anthony Maire.	mattsicker
	More reliable checking for runtime dependencies. Fixes LOG4J2-1876.	mikes
	Fix configuration documentation. Fixes LOG4J2-1867.	mikes
	Ensure the ThreadLocal StringBuilder in ParameterizedMessage won't hold excessively much memory after logging a long message. Fixes LOG4J2-1858.	rpopma
	Fix documentation about default additivity value for loggers. Fixes LOG4J2-1885.	mattsicker
	ScriptEngineManager is not available in Android and causes a NoClassDefFoundError. Fixes LOG4J2-1920. Thanks to Ajitha.	ggregory
	Clarify Javadoc for AbstractTriggeringPolicy. Fixes LOG4J2-1989. Thanks to Kenneth McFarland.	ggregory
	Fix compiler warnings in LoggerConfigTest. Fixes LOG4J2-1993. Thanks to Kenneth McFarland.	ggregory
	Move server components from log4j-core to new log4-server module. Fixes LOG4J2-1851.	mikes
	Shortcut to add Property and KeyValuePair component in ConfigurationBuilder. Fixes LOG4J2-1860.	mikes
	The JMS Appender should use a JMS MapMessage for a Log4j MapMessage. Fixes LOG4J2-1294.	ggregory
	Refactor SimpleMessage to be concise and clear (#100). Fixes LOG4J2-1991.	ggregory
	Update Jackson from 2.8.9 to 2.9.0. Fixes LOG4J2-2017.	ggregory
	Update ZeroMQ's JeroMQ from 0.3.6 to 0.4.0. Fixes LOG4J2-1868.	ggregory
	Update ZeroMQ's JeroMQ from 0.4.0 to 0.4.1. Fixes LOG4J2-1960.	ggregory
	Update ZeroMQ's JeroMQ from 0.4.1 to 0.4.2. Fixes LOG4J2-1974.	ggregory
	Update Kafka client from 0.10.1.1 to 0.10.2.0. Fixes LOG4J2-1869.	ggregory
	Update Kafka client from 0.10.2.0 to 0.11.0.0. Fixes LOG4J2-1962.	ggregory
	Update JavaMail from 1.5.5 to 1.5.6. Fixes LOG4J2-1872.	ggregory
	Update JAnsi from 1.14 to 1.15. Fixes LOG4J2-1879.	ggregory
	Missing documentation for Max index limit in DefaultRolloverStrategy. Fixes LOG4J2-1877. Thanks to Chandra Tungathurthi.	ggregory
	Add missing getters to classes in package org.apache.logging.log4j.core.net.ssl. Fixes LOG4J2-1899.	ggregory
	Update JAnsi from 1.15 to 1.16. Fixes LOG4J2-1900.	ggregory
	Update SLF4J from 1.7.24 to 1.7.25. Fixes LOG4J2-.	ggregory
	Update Jackson from 2.8.7 to 2.8.9. Fixes LOG4J2-1938.	ggregory
	Update HdrHistogram from 2.1.8 to 2.1.9. Fixes LOG4J2-1970.	rpopma
	Update javax.persistence from 2.1.0 to 2.1.1. Fixes LOG4J2-1975.	ggregory
	Update org.osgi.core from 4.3.1 to 6.0.0. Fixes LOG4J2-1976.	ggregory

Release 2.8.2 – 2017-04-02

Type	Changes	By
	Fix JavaDoc on org.apache.logging.log4j.ThreadContext about inheritance. Fixes LOG4J2-1861.	mattsicker
	Fix JavaDoc about @Order and OrderComparator ordering. Fixes LOG4J2-1862. Thanks to wangyuntao.	mattsicker
	Fixed daylight savings time (DST) issue with FixedDateFormat. Fixes LOG4J2-1849.	rpopma
	Fix CassandraRule and unit tests on Windows. Fixes LOG4J2-1850. Thanks to Ludovic Hochet.	mattsicker
	Fix typo in %replace converter documentation. Fixes LOG4J2-1840. Thanks to Pradeep Balasundaram.	mattsicker
	Handle when LogEvent.getLoggerName() returns null in LoggerNameLevelRewritePolicy. Fixes LOG4J2-1846.	mikes
	Handle when LogEvent.getLoggerName() returns null in KafkaAppender. Fixes LOG4J2-1845.	mikes
	The default value of RandomAccessFileAppender.Builder append field is wrong. Fixes LOG4J2-1853. Thanks to wangyuntao.	ggregory
	Add support for filtering input in TcpSocketServer and UdpSocketServer. Fixes LOG4J2-1863.	mattsicker
	Add JSON encoding support to EncodingPatternConverter %encode{}. Fixes LOG4J2-1848.	mattsicker
	Add support for appending common suffix to each line of throwable stack trace. Fixes LOG4J2-1843. Thanks to Zilong Song.	mattsicker
	Add support for appending common suffix to each line of extended and root throwable stack trace. Fixes LOG4J2-1838. Thanks to Zilong Song.	mattsicker
	Move integration tests to their own module to speed up build. Fixes LOG4J2-1827.	rgoers
	Fix documentation about the licensing for JeroMQ. Fixes LOG4J2-1835.	mattsicker
	Update the API version to 2.6.0. Fixes LOG4J2-1836.	rgoers
	NullPointerException in HtmlLayout. Fixes LOG4J2-1831. Thanks to Edward Serebrinskiy.	ggregory
	Log4j 2.8 can lose exceptions when a security manager is present. Fixes LOG4J2-1820. Thanks to Jason Tedor.	ggregory
	Update Jackson from 2.8.6 to 2.8.7. Fixes LOG4J2-1856.	ggregory

Release 2.8.1 – 2017-02-26

Type	Changes	By
	Allow %i in file pattern to be preceded with characters other than just '-'. Fixes LOG4J2-1804. Thanks to Pierrick Hymbert.	rgoers
	Update SLF4J to 1.7.24. Fixes LOG4J2-1822.	rgoers
	Improved error message when log4j 2 configuration file not found. Fixes LOG4J2-1812.	rpopma
	Update to use Logback 1.1.10 and then Logback 1.2 for tests. Fixes LOG4J2-1810.	rgoers
	Update Jackson from 2.8.5 to 2.8.6. Fixes LOG4J2-1819.	ggregory
	Fix ClassNotFoundException org.apache.logging.log4j.core.util.ExecutorServices in OSGi tests. Fixes LOG4J2-1753. Thanks to Ludovic Hochet.	ggregory
	Change minOccur to minOccurs in Log4j-config.xsd. Fixes LOG4J2-1816. Thanks to shubhankar1100.	rpopma
	Fix Maven POM to ensure JMH generated classes in log4j-perf are included in benchmarks jar. Fixes LOG4J2-1803.	rgoers
	Report errors when sending to Kafka when using syncSend=false. Fixes LOG4J2-1800. Thanks to Vincent Tieleman.	mikes
	Fixed rare race condition in FixedDateFormat, made FixedDateFormat::millisSinceMidnight method public. Fixes LOG4J2-1805.	rpopma
	Fixed bug in PropertiesUtil::getCharsetProperty that caused UnsupportedCharsetException for ConsoleAppender. Fixes LOG4J2-1799. Thanks to Eduard Gizatullin.	rpopma
	Fix Javadoc for DefaultRolloverStrategy::purgeAscending. Fixes LOG4J2-1806. Thanks to challarao.	rpopma
	Fix rollover to work when filePattern contains no directory components. Fixes LOG4J2-1818. Thanks to xkr47.	ggregory
	Remove deprecation on MessageSupplier lambda functions in Logger API. Fixes LOG4J2-1823.	mattsicker
	[core] Add and implement LogEvent.toImmutable(). Fixes LOG4J2-1807.	ggregory

Release 2.8 – 2017-01-21

Type	Changes	By
	Eliminate the use of the ExecutorServices in the LoggerContext. Fixes LOG4J2-1780.	mikes
	Make DefaultRolloverStrategy more efficient when renaming files. Add nomax option to the fileIndex attribute. Fixes LOG4J2-1032.	rgoers
	RollingFileAppender now supports omitting the file name and writing directly to the archive files. Fixes LOG4J2-1101.	rgoers
	ConfigurationScheduler now preserves interrupt flag during stop. Fixes LOG4J2-1786.	rpopma
	Allow default value in property to be a Lookup. Fixes LOG4J2-1243.	rgoers
	Fixed bug where AsyncLogger did not resolve configuration properties. Fixes LOG4J2-1779.	rpopma
	Fixed concurrency issue affecting all layouts except PatternLayout and GelfLayout, which caused scrambled output and exceptions when logging synchronously from multiple threads. Fixes LOG4J2-1769. Thanks to Brandon Goodin.	rpopma
	Using variables in GelfLayout's additional fields at runtime. Fixes LOG4J2-1724. Thanks to Alexander Krasnostavsky.	mikes
	Add Builder to GelfLayout. Fixes LOG4J2-1762.	mikes
	Insure the ConfigurationScheduler shuts down without blocking. Fixes LOG4J2-1649. Thanks to Georg Friedrich.	rgoers
	CronTriggeringPolicy would use the wrong date/time when rolling over and create multiple triggering policies on reconfiguration. Fixes LOG4J2-1653. Thanks to Georg Friedrich.	rgoers
	Do not use non-daemon thread pool for rollover tasks. Fixes LOG4J2-1748.	mikes
	Fixed file locking regression in FileAppender introduced in 2.6. Fixes LOG4J2-1628.	rpopma
	The custom logger Generate tool no longer requires the log4j-api module on the classpath. Fixes LOG4J2-1744.	rpopma
	SslSocketManager now respects connectTimeoutMillis. Fixes LOG4J2-1731. Thanks to Chris Ribble.	rpopma
	Logger using LocalizedMessageFactory prints key instead of message. Fixes LOG4J2-1682. Thanks to Markus Waidhofer.	ggregory
	Make GelfLayout independent of Jackson. Fixes LOG4J2-1720.	mikes
	Fixed race condition in ObjectMessage and SimpleMessage, ensuring that the log message contains the value the object has during the logging call. Fixes LOG4J2-1719.	rpopma
	Fixed bug where elements of a log message parameter array were nulled out in garbage-free mode. Fixes LOG4J2-1688.	rpopma
	Add putAll() method to CloseableThreadContext. Fixes LOG4J2-1692. Thanks to Greg Thomas.	mikes
	Add CleanableThreadContextMap interface supporting method removeAll(Iterable<String>). Fixes LOG4J2-1689.	mikes
	Option 'disableAnsi' in PatternLayout to unconditionally disable ANSI escape codes. Fixes LOG4J2-1685. Thanks to Raman Gupta.	mikes
	Make TimeFilter usable as global filter and as logger filter. Fixes LOG4J2-1706.	rpopma
	(GC) Avoid allocating temporary objects in VariablesNotEmptyReplacementConverter. Fixes LOG4J2-1722.	rpopma
	(GC) Avoid allocating temporary objects in EncodingPatternConverter. Fixes LOG4J2-1717.	rpopma
	(GC) Avoid allocating temporary objects in MapPatternConverter. (Note that constructing a MapMessage is not garbage-free.). Fixes LOG4J2-1716.	rpopma
	(GC) Avoid allocating temporary objects in MapMessage. Fixes LOG4J2-1683.	rpopma
	(GC) Avoid allocating temporary objects in NdcPatternConverter. (Note that use of the ThreadContext stack is not garbage-free.). Fixes LOG4J2-1715.	rpopma
	(GC) Avoid allocating temporary objects in AbstractStyleNameConverter. Fixes LOG4J2-1714.	rpopma
	(GC) Avoid allocating temporary objects in TimeFilter. Fixes LOG4J2-1680.	rpopma
	(GC) Avoid allocating temporary objects in StructuredDataFilter. Fixes LOG4J2-1679.	rpopma
	(GC) Avoid allocating temporary objects in ThreadContextMapFilter. Fixes LOG4J2-1678.	rpopma
	(GC) Avoid allocating temporary objects in MapFilter. Fixes LOG4J2-1677.	rpopma
	(GC) Avoid allocating temporary objects in ThresholdFilter. Fixes LOG4J2-1674.	rpopma
	(GC) Avoid allocating temporary objects in MarkerFilter. Fixes LOG4J2-1673.	rpopma
	(GC) Avoid allocating temporary objects in LevelRangeFilter. Fixes LOG4J2-1672.	rpopma
	(GC) Avoid allocating temporary objects in EqualsIgnoreCaseReplacementConverter. Fixes LOG4J2-1671.	rpopma
	(GC) Avoid allocating temporary objects in EqualsReplacementConverter. Fixes LOG4J2-1670.	rpopma
	(GC) Avoid allocating temporary objects in MaxLengthConverter. Fixes LOG4J2-1669.	rpopma
	(GC) Avoid allocating temporary objects in MarkerPatternConverter. Fixes LOG4J2-1668.	rpopma
	(GC) Avoid allocating temporary objects in SequenceNumberPatternConverter. Fixes LOG4J2-1667.	rpopma
	(GC) Avoid allocating temporary objects in RelativeTimePatternConverter. Fixes LOG4J2-1666.	rpopma
	(GC) Avoid allocating temporary objects in IntegerPatternConverter. Fixes LOG4J2-1665.	rpopma
	Fixed problems when used in OSGi containers (IllegalAccessError, NoClassDefFoundError). Fixes LOG4J2-1637.	rpopma
	Improve LogEvent serialization to handle non-serializable Messages and deserializing when required classes are missing. Fixes LOG4J2-1226.	rpopma
	Ensure SortedArrayStringMap can be serialized and deserialized without errors regardless of content. Fixes LOG4J2-1663.	rpopma
	Prevent NPE in ThreadContextMapFactory::createThreadContextMap when initializing Log4j with Configurator::initialize and the BasicContextSelector is used. Fixes LOG4J2-1658.	rpopma
	Immutable empty StringMap. Fixes LOG4J2-1645.	mikes
	Configurable JVM shutdown hook timeout. Fixes LOG4J2-1623.	mikes
	Pick up bug fixes from Apache Commons Lang's org.apache.commons.lang3.time package. Fixes LOG4J2-1712.	ggregory
	Console Appender does not pick up Oracle Java 8's sun.stdout.encoding and sun.stderr.encoding. Fixes LOG4J2-1636. Thanks to Eldar Gabdullin.	ggregory
	Fix MemoryMappedFileAppender.createAppender() Javadoc for immediateFlush. Fixes LOG4J2-1639. Thanks to Sridhar Gopinath.	ggregory
	Some LogEvents may not carry a Throwable (Use Message.getThrowable() in log(Message) methods.). Fixes LOG4J2-1676. Thanks to Joern Huxhorn.	ggregory
	Unwanted transitive dependency on geronimo-jms_1.1_spec causes OSGi tests to fail. Fixes LOG4J2-1723. Thanks to Ludovic HOCHET.	ggregory
	Improve OSGi unit tests. Fixes LOG4J2-1664. Thanks to Ludovic HOCHET.	ggregory
	NPE in ThrowableProxy when resolving stack in Java EE/OSGi environment. Fixes LOG4J2-1687. Thanks to Robert Christiansen.	ggregory
	DefaultShutdownCallbackRegistry can throw a NoClassDefFoundError. Fixes LOG4J2-1642. Thanks to Johno Crawford.	ggregory
	CronTriggeringPolicy raise exception and fail to rollover log file when evaluateOnStartup is true. Fixes LOG4J2-1474. Thanks to yin mingjun, Neon.	ggregory
	SslSocketManagerFactory might leak Sockets when certain startup errors occur. Fixes LOG4J2-1734.	ggregory
	TcpSocketManagerFactory might leak Sockets when certain startup errors occur. Fixes LOG4J2-1736.	ggregory
	Add CronTriggeringPolicy programmatically leads to NPE. Fixes LOG4J2-1740.	ggregory
	CompositeConfiguration does not add filters to appenderRefs. Fixes LOG4J2-1743. Thanks to Toby Shepheard.	ggregory
	Adds xmlns in schema and some other tags. Fixes LOG4J2-1756. Thanks to shubhankar1100.	ggregory
	Update Conversant Disruptor from 1.2.7 to 1.2.10. Fixes LOG4J2-1781.	mattsicker
	Replace MockEJB dependency in unit tests with Spring Test and Mockito. Fixes LOG4J2-1774.	mattsicker
	Inefficient locking in AbstractLoggerAdapter. Fixes LOG4J2-1644. Thanks to Tim Gokcen, Pavel Sivolobtchik.	ggregory
	Update JeroMQ from 0.3.5 to 0.3.6. Fixes LOG4J2-1641.	ggregory
	Update Commons Lang from 3.4 to 3.5. Fixes LOG4J2-1647.	mattsicker
	Migrate to Mockito 2.x in unit tests. Fixes LOG4J2-1646.	mattsicker
	Update Jackson from 2.8.3 to 2.8.4. Fixes LOG4J2-1655.	ggregory
	Update Jackson from 2.8.4 to 2.8.5. Fixes LOG4J2-1735.	ggregory
	Update Apache Flume from 1.6.0 to 1.7.0. Fixes LOG4J2-1656.	ggregory
	Update LMAX Disruptor from 3.3.5 to 3.3.6. Fixes LOG4J2-1698.	ggregory
	Update Jansi from 1.13 to 1.14. Fixes LOG4J2-1700.	ggregory
	Update Kafka from 0.10.0.1 to 0.10.1.1. Fixes LOG4J2-1750.	ggregory
	Update liquibase-core from 3.5.1 to 3.5.3. Fixes LOG4J2-1751.	ggregory
	The log4j-slf4j-impl module now declares a runtime dependency on log4j-core. While not technically required, this makes the log4j-slf4j-impl module behave similarly to slf4j-log4j12, and facilitates migration to Log4j 2. Fixes LOG4J2-1302.	rpopma
	Document how to exclude transitive conflicting dependencies in Maven and Gradle. Fixes LOG4J2-1787.	mattsicker
	Add StatusLoggerRule to allow unit tests to set a status level. Fixes LOG4J2-1773.	mattsicker
	Add non-string data type support to JdbcAppender via new ColumnMapping plugin. Fixes LOG4J2-424.	mattsicker
	Add a Builder to ColumnConfig and deprecate ColumnConfig.createColumnConfig(). Fixes LOG4J2-1771.	mattsicker
	Add a Builder to JdbcAppender and deprecate JdbcAppender.createAppender(). Fixes LOG4J2-1770.	mattsicker
	Use MethodHandle in ContextDataFactory cached constructor. Fixes LOG4J2-1764.	mattsicker
	Add Apache Cassandra appender and ColumnMapping plugin. Fixes LOG4J2-1730.	mattsicker
	Add TypeConverter for java.util.UUID. Fixes LOG4J2-1759.	mattsicker
	Add TypeConverter for java.nio.file.Path. Fixes LOG4J2-1758.	mattsicker
	Add TypeConverter and constraint validators for java.net.InetAddress and port numbers. Fixes LOG4J2-1755.	mattsicker
	Refactor SyslogAppender so that Layout is a Plugin element. Fixes LOG4J2-969.	ggregory
	Added public method ThreadContext::getThreadContextMap; removed class ThreadContextAccess. Fixes LOG4J2-1660.	rpopma
	Add documentation regarding YAML configuration format. Fixes LOG4J2-1379.	mattsicker
	Introduce marker interface AsynchronouslyFormattable. Fixes LOG4J2-1718.	rpopma
	Introduce interfaces IndexedStringMap and IndexedReadOnlyStringMap, supporting garbage-free iteration over sorted map. Fixes LOG4J2-1681.	rpopma
	Add a Builder to ScriptPatternSelector and deprecate ScriptPatternSelector.createSelector(). Fixes LOG4J2-1695.	ggregory
	Add a Builder to MarkerPatternSelector and deprecate MarkerPatternSelector.createSelector(). Fixes LOG4J2-1696.	ggregory
	Add a SerializerBuilder to PatternLayout and deprecate PatternLayout.createSerializer(). Fixes LOG4J2-1697.	ggregory
	Add a Builder to RandomAccessFileAppender and deprecate RandomAccessFileAppender.createAppender(). Fixes LOG4J2-1701.	ggregory
	Add a Builder to MemoryMappedFileAppender and deprecate MemoryMappedFileAppender.createAppender(). Fixes LOG4J2-1703.	ggregory
	Add a Builder to RollingRandomAccessFileAppender and deprecate RollingRandomAccessFileAppender.createAppender(). Fixes LOG4J2-1704.	ggregory
	Add a Builder to SyslogAppender and deprecate SyslogAppender.createAppender(). Fixes LOG4J2-1709.	ggregory
	Allow TCP Socket Appender to set socket options. Fixes LOG4J2-1707.	ggregory
	Allow Secure Socket Appender to set socket options. Fixes LOG4J2-1708.	ggregory
	Add a Builder to SyslogLayout and deprecate SyslogLayout.createLayout(Facility, boolean, String, Charset). Fixes LOG4J2-1737.	ggregory
	Add a Builder to JsonLayout and deprecate org.apache.logging.log4j.core.layout.JsonLayout.createLayout(Configuration, boolean, boolean, boolean, boolean, boolean, boolean, String, String, Charset, boolean). Fixes LOG4J2-1738.	ggregory
	Add Builder to KafkaAppender and deprecate KafkaAppender.createAppender(Layout, Filter, String, boolean, String, Property[], Configuration). Fixes LOG4J2-1739.	ggregory
	Add SyncSend attribute to KafkaAppender (as in KafkaLog4jAppender). Fixes LOG4J2-1733. Thanks to Vincent Tieleman.	ggregory
	Cannot define both `filters` and `separator` for PatternLayout %xEx. Fixes LOG4J2-2195. Thanks to Raman Gupta, Gary Gregory.	ggregory
	RootThrowablePatternConverter does not use TextRenderer or line separator options. Fixes LOG4J2-2221. Thanks to Raman Gupta, Gary Gregory.	ggregory

Release 2.7 – 2016-10-02

Type	Changes	By
	Fixed ClassCastException when using JUL logging during shutdown. Fixes LOG4J2-1618. Thanks to Raman Gupta.	rpopma
	2.7-rc1: RollingFileAppender immediateFlush default value should be true, not false. Fixes LOG4J2-1620. Thanks to Sascha Scholz.	ggregory
	Improved performance of context data injector for web applications to be on par with standalone applications. Fixes LOG4J2-1611.	rpopma
	Introduced new interface LifeCycle2 with stop(long,TimeUnit) method to avoid breaking backwards compatibility with new Configurator.shutdown(LoggerContext, long, TimeUnit) API. Fixes LOG4J2-1591.	rpopma
	Fixed issue with filters extending AbstractFilter that did not override methods with unrolled varargs. Fixes LOG4J2-1590.	rpopma
	Fixed scrambled log messages triggered by nested logging from toString() method of a logging parameter object. Fixes LOG4J2-1583. Thanks to Larry West.	rpopma
	Log4j threads are no longer leaking on Tomcat shutdown. Fixes LOG4J2-1259. Thanks to Misagh Moayyed, Steffen Offermann.	ggregory
	When starting on Google App Engine, Interpolator now suppresses the NoClassDefFoundError stack trace for the jvmrunargs lookup. Fixes LOG4J2-1051. Thanks to Lukasz Lenart.	rpopma
	When initializing on platforms where JMX is not available, Interpolator component no longer prints stack trace for warning messages. Fixes LOG4J2-1582.	rpopma
	Unregistering JMX components no longer prints a stack trace when the MBean has already been unregistered. Fixes LOG4J2-1581.	rpopma
	Support Property values to be specified in configuration as a value attribute as well as an element. Fixes LOG4J2-1313. Thanks to Philipp Knobel, Leon Finker.	rpopma
	(GC) LoggerConfig now stores configuration properties in a List, not a Map to prevent creating temporary Iterator objects. Added method LoggerConfig#getPropertyList(), deprecated method #getProperties(). Fixes LOG4J2-1575.	rpopma
	Fixed class loader deadlock when using async logging and extended stack trace pattern. Fixes LOG4J2-1457. Thanks to Leon Finker.	mattsicker
	Fix to prevent Log4j 2.6.2 and higher from losing exceptions when a security manager is present. Fixes LOG4J2-1563. Thanks to Jason Tedor.	ggregory
	Fixed issue where LogEvent.getContextStack() returned null. Fixes LOG4J2-1530.	mikes
	Prevent deadlock in Async Loggers when queue is full and logged Object's toString() logs another message. Fixes LOG4J2-1518. Thanks to Leon Finker.	rpopma
	Prevent ArrayIndexOutOfBoundsException in ParameterizedMessage.formatTo for single-char or empty messages. Fixes LOG4J2-1542. Thanks to Rogério Lecarião Leite.	rpopma
	Fixed issue where AsyncLoggerContextSelector+PropertiesConfigurationBuilder defaulted to includeLocation=true. Fixes LOG4J2-1549. Thanks to Jason Bedard.	mikes
	Prevent SocketAppender memory usage from growing unbounded if it cannot connect to a server. Fixes LOG4J2-1562.	ggregory
	Prevent NPE in Level.isInRange. Fixes LOG4J2-1559. Thanks to Andrey Plotkin.	ggregory
	DynamicThresholdFilter filtered incorrectly when params were passed as individual arguments instead of varargs. Fixes LOG4J2-1511. Thanks to Srikanth Surukuntu.	ggregory
	[CronTriggeringPolicy] ConfigurationScheduler scheduled the task infinitely after first fire. Fixes LOG4J2-1548.	ggregory
	Log4j should not unregister JMX MBeans when log4j2.disable.jmx property is true. Fixes LOG4J2-1506. Thanks to Johannes Schleger.	ggregory
	Log4j2 should postpone creating log file until the appender actually receives an event. Fixes LOG4J2-1490. Thanks to Krzysztof Taborski.	ggregory
	Support loading custom plugins from jar files and directories whose classpath entries use the "vfs" URL protocol. Fixes LOG4J2-1320. Thanks to Paresh Varke, Pierrick Hymbert.	ggregory
	Fix file handle resource leak in XmlConfiguration.XmlConfiguration(ConfigurationSource). Fixes LOG4J2-1541.	ggregory
	Prevent NPE when dynamically removing filters. Fixes LOG4J2-1538. Thanks to Igor Karpov.	ggregory
	Attributes were not merged properly in composite configurations. Fixes LOG4J2-1532.	ggregory
	Attributes were not merged properly in composite configurations. Fixes LOG4J2-1529. Thanks to Sridevi Narra.	mattsicker
	Prevent NPE in RingBufferLogEvent.getFormattedMessage() when used in web applications. Fixes LOG4J2-1527. Thanks to Jose Leon.	rpopma
	Added ability to disable (date) lookup completely for compatibility with other libraries like Camel. Fixes LOG4J2-905. Thanks to Moritz Löser.	ggregory
	Added support for setting StatusLogger destination in ConfigurationBuilder. Fixes LOG4J2-1526.	mikes
	Allow comma separated agents, host list to be passed to FlumeAppender. Fixes LOG4J2-1448. Thanks to Keith Laban.	rpopma
	Merging configurations failed with an NPE when comparing Nodes with different attributes. Fixes LOG4J2-1500. Thanks to Jose Leon.	ggregory
	Fixed improper header in CsvParameterLayout. Fixes LOG4J2-1482. Thanks to Sumit Singhal.	ggregory
	Documented that JVM Input Arguments Lookup (JMX) is not available on Google App Engine. Fixes LOG4J2-1199.	rpopma
	(GC) Added method getParameter() to ObjectMessage (and ReusableObjectMessage). Fixes LOG4J2-1438.	rpopma
	(GC) Fixed ISO8601 %date conversion pattern with a period '.' separator for milliseconds is now garbage free. Fixes LOG4J2-1488. Thanks to Richard Zschech.	rpopma
	(GC) Fixed %date conversion patterns with a timezone parameter are now garbage free. Fixes LOG4J2-1489. Thanks to Richard Zschech.	rpopma
	Prevent NullPointerException in FastDateParser$TimeZoneStrategy. Fixes LOG4J2-1279. Thanks to Tony Baines.	rpopma
	(GC) HighlightConverter and StyleConverter are now GC-free. Fixes LOG4J2-1341. Thanks to Richard Zschech.	rpopma
	[OSGi] Fixed missing import package. Fixes LOG4J2-1467. Thanks to Ralf, Gary Gregory.	rpopma, ggregory
	[OSGi] Fixed wrong Fragment-Host in manifest files. Fixes LOG4J2-351. Thanks to Roland Weiglhofer.	rpopma, ggregory
	Properties declared in configuration can now have their value either in the element body or in an attribute named "value". Fixes LOG4J2-1313. Thanks to Philipp Knobel.	rpopma
	org.apache.logging.log4j.core.appender.routing.IdlePurgePolicy was not working correctly. Fixes LOG4J2-1235. Thanks to Niranjan Rao, Sascha Scholz, Aleksey Zvolinsky.	ggregory
	Fixed issue where CsvParameterLayout and CsvLogEventLayout inserted NUL characters if data starts with {, (, [ or ". Fixes LOG4J2-1502. Thanks to Sumit Singhal.	ggregory
	Layout is no longer optional. Fixes LOG4J2-1573. Thanks to Steffen Offermann.	ggregory
	ServletAppender does not provide throwable object to ServletContext. Fixes LOG4J2-1608.	ggregory
	Prevent potential NPE in org.apache.logging.log4j.message.ParameterFormatter.formatMessage3(StringBuilder, char[], int, Object[], int, int[]). Fixes LOG4J2-1599.	ggregory
	Prevent potential NPE due to org.apache.logging.log4j.core.layout.MarkerPatternSelector.createSelector(PatternMatch[], String, boolean, boolean, Configuration). Fixes LOG4J2-1600.	ggregory
	Prevent potential NPE due to org.apache.logging.log4j.core.layout.ScriptPatternSelector.createSelector(AbstractScript, PatternMatch[], String, boolean, boolean, Configuration). Fixes LOG4J2-1601.	ggregory
	Prevent potential NPE in org.apache.logging.log4j.core.util.datetime.FormatCache.MultipartKey.equals(Object) when object is null. Fixes LOG4J2-1602.	ggregory
	Redo hashCode() and equals() methods in org.apache.logging.log4j.core.net.ssl classes. Fixes LOG4J2-1603.	ggregory
	Add targetNamespace to log4j-config.xsd. GitHub #43. Fixes LOG4J2-1610. Thanks to Shubhankar.	ggregory
	new Log4jLogEvent().toString() throws an NPE. Fixes LOG4J2-1619.	ggregory
	RoutingAppender can be configured with scripts. Add Script in a Routes element. Fixes LOG4J2-1578.	ggregory
	Add a ScriptAppenderSelector to create an Appender specified by a Script. Fixes LOG4J2-1597.	ggregory
	(GC) Added support for garbage-free ThreadContext map. Disabled by default, users need to enable this explicitly. Fixes LOG4J2-1349.	rpopma
	(GC) Changed LogEvent's internal data structure for context data to be garbage-free. Added method LogEvent#getContextData(), deprecated method #getContextMap(). Fixes LOG4J2-1447.	rpopma
	Users can now inject context data from other sources than ThreadContext. Values can be any Object, not just Strings. Fixes LOG4J2-1010. Thanks to Mikael Ståldal.	rpopma
	Added support for java.util.concurrent.LinkedTransferQueue to AsyncAppender. Fixes LOG4J2-1568.	mattsicker
	Added optional support for Conversant DisruptorBlockingQueue in AsyncAppender. Fixes LOG4J2-1430. Thanks to John Cairns.	mattsicker
	Added optional support for JCTools MPSC bounded lock-free queue in AsyncAppender. Fixes LOG4J2-1439. Thanks to Anthony Maire.	mattsicker
	SocketAppender now supports IO buffering. Fixes LOG4J2-1558.	ggregory
	Add a Builder for the SocketAppender (deprecates factory method). Fixes LOG4J2-1557.	ggregory
	Add a Builder to ServletAppender and deprecate factory method. Fixes LOG4J2-1609.	ggregory
	AbstractManager now implements AutoCloseable. Fixes LOG4J2-1553.	ggregory
	Added ability to generate Log4j 2-style XML configuration file from ConfigurationBuilder. Fixes LOG4J2-1528.	mikes
	Added Logging API for Scala 2.10 and 2.11. Fixes LOG4J2-1181.	mikes
	Added options to exclude stack trace from JSON, XML and YAML layouts. Fixes LOG4J2-1512.	mikes
	Added Core API Configurator.shutdown(LoggerContext, long, TimeUnit). Fixes LOG4J2-1539.	ggregory
	FileAppender is now able to create files on-demand. Fixes LOG4J2-1501.	ggregory
	RollingFileAppender is now able to create files on-demand. Fixes LOG4J2-1504.	ggregory
	[PatternLayout] Add an ANSI option to %xThrowable. Fixes LOG4J2-1471.	ggregory
	org.apache.logging.log4j.core.LoggerContext now implements Closeable. Fixes LOG4J2-1472.	ggregory
	[PatternLayout] Add an ANSI option to %message. Fixes LOG4J2-1458.	ggregory
	Create a Builder for the FileAppender plugin to facilitate adding attributes in the future. Fixes LOG4J2-1505.	ggregory
	Allow Builders to be completely generic. Fixes LOG4J2-1507.	ggregory
	Allow a Builder to subclass another Builder. Fixes LOG4J2-1508.	ggregory
	Add ThreadContextMap2 interface supporting method putAll(Map<String, String>). Fixes LOG4J2-1516. Thanks to Gary Gregory.	rpopma
	Add ThreadContext.putAll(Map<String, String>). Fixes LOG4J2-1519.	ggregory
	Add JUnit Rule implementations to manage the thread context. Fixes LOG4J2-1520.	ggregory
	The Core AbstractConfiguration now tracks its LoggerContext and add Configuration.getLoggerContext(). Fixes LOG4J2-1547.	ggregory
	The Core AbstractManager now tracks its LoggerContext. Fixes LOG4J2-1540.	ggregory
	Add a Builder to the RoutingAppender and deprecate factory method. Fixes LOG4J2-1577.	ggregory
	Log4j2 TcpSocketServer in background. Fixes LOG4J2-1604. Thanks to Colin Hillman.	ggregory
	Allow the RollingFileAppender to use default pattern layout. Fixes LOG4J2-1574.	ggregory
	Custom Log4j threads now extend Log4jThread. Fixes LOG4J2-1556.	ggregory
	Improve error messages for TcpSocketServer and UdpSocketServer. Fixes LOG4J2-1605.	ggregory
	Updated Jackson from 2.7.5 to 2.8.0. Fixes LOG4J2-1458.	ggregory
	Updated Jackson from 2.8.0 to 2.8.1. Fixes LOG4J2-1494.	ggregory
	Updated Jackson from 2.8.1 to 2.8.2. Fixes LOG4J2-1569.	ggregory
	Updated Jackson from 2.8.2 to 2.8.3. Fixes LOG4J2-1598.	ggregory
	Updated LMAX Disruptor from 3.3.4 to 3.3.5. Fixes LOG4J2-1495.	ggregory
	Updated Kafka client from 0.9.1.0 to 0.10.0.0. Fixes LOG4J2-1496.	ggregory
	Updated Kafka client from 0.10.0.0 to 0.10.0.1. Fixes LOG4J2-1533.	ggregory
	Updated JMS test from ActiveMQ 5.13.3 to 5.13.4. Fixes LOG4J2-1487.	ggregory
	Updated JMS test from ActiveMQ 5.13.4 to 5.14.0. Fixes LOG4J2-1551.	ggregory
	Update Apache Commons Compress from 1.12 to 1.13. Fixes LOG4J2-1757.	ggregory
	Removed deprecated Core API org.apache.logging.log4j.core.util.Constants.UTF_8. Fixes LOG4J2-1543.	ggregory
	Removed deprecated Core API org.apache.logging.log4j.core.util.Assert.requireNonNull(T, String). Fixes LOG4J2-1544.	ggregory
	Removed deprecated Web API org.apache.logging.log4j.web.WebLookup.getServletContext(). Fixes LOG4J2-1545.	ggregory

Release 2.6.2 – 2016-07-05

Type	Changes	By
	If copy and delete fails in rename action then resort to truncating the source file after copying it. Fixes LOG4J2-904. Thanks to Bernhard Mähr.	rgoers
	CronTriggeringPolicy was not properly setting the prevFileTime value for the PatternProcessor so file dates and times on rolled files were incorrect. Fixes LOG4J2-1250.	rgoers
	Fixed issue where reusable messages broke flow tracing logic. Fixes LOG4J2-1452. Thanks to Mikael Ståldal.	rpopma
	Fix bug in OnStartupTriggeringPolicy that allowed it to roll over on every reconfiguration. Added minSize attribute. Fixes LOG4J2-1440.	rgoers
	Fixed minor issues with the 2.6.1 web site. Fixes LOG4J2-1414. Thanks to Ralph Goers.	rpopma
	Ensure that the thread-local StringBuilders used by Layouts to format log events to text will not retain excessive memory after a large message was logged. Fixes LOG4J2-1434. Thanks to Luke Butters.	rpopma
	Add "direct" option to ConsoleAppender for increased performance. Fixes LOG4J2-1395.	mikes
	Provide MessageFactory2 to custom Logger implementations. Fixes LOG4J2-1418.	mikes
	RollingRandomAccessFileManager was not properly rolling over on startup and was getting a NullPointerException. Fixes LOG4J2-1420.	rgoers
	Fixed issue where Unbox utility ignored the value Constants.ENABLE_THREADLOCALS and always stored non-JDK classes in ThreadLocals. Fixes LOG4J2-1417.	rpopma
	Fixed issue where AsyncAppenderQueueFullPolicyTest sometimes hangs. Fixes LOG4J2-1422.	rpopma
	OnStartupTriggeringPolicyTest fails on Windows saying the file is used by another process. Fixes LOG4J2-1445. Thanks to Ludovic HOCHET.	ggregory
	(GC) ObjectMessage and ReusableObjectMessage now avoid calling toString() on auto-boxed primitive parameters. Fixes LOG4J2-1437.	rpopma
	(GC) ParameterFormatter now avoids calling toString() on auto-boxed primitive message parameters. Fixes LOG4J2-1415.	rpopma
	Unbox utility's ringbuffer of StringBuilders is now configurable. Fixes LOG4J2-1412.	rpopma
	Update Jackson from 2.7.4 to 2.7.5. Fixes LOG4J2-1432.	ggregory
	Update Jansi from 1.11 to 1.13. Fixes LOG4J2-1433.	ggregory
	Update Apache Commons Compress from 1.11 to 1.12. Fixes LOG4J2-1444.	ggregory

Release 2.6.1 – 2016-06-05

Type	Changes	By
	OnStartupTriggeringPolicy was forcing a rollover of empty files at startup and would append a second footer that was added by the prior shutdown. Fixes LOG4J2-1405.	rgoers
	Fixed bug in ReusableParameterizedMessage where Throwable was never updated so first error was logged over and over again and subsequent errors were not logged. Fixes LOG4J2-1406. Thanks to Trask Stalnaker.	rpopma
	Fixed ArrayIndexOutOfBoundsException that may occur in ReusableParameterizedMessage. Fixes LOG4J2-1409. Thanks to Shahan.	rpopma
	Add filter and remove filter were not working properly in AbstractFilterable. Fixes LOG4J2-997. Thanks to Maytee Chinavanichkit.	rgoers
	Changed RenameAction to use java.nio to better report rename failures. Fixes LOG4J2-1032.	rgoers
	Fixed misleading WARN log events from Log4j about message factories and unexpected formatting. Fixes LOG4J2-1407.	ggregory
	Added the module log4j-liquibase to BOM POM. Fixes LOG4J2-1408.	ggregory
	Logger cache now accounts for message factory. Fixes LOG4J2-1180.	ggregory
	Fix regression in properties configuration to support arbitrary component ids. Fixes LOG4J2-1402.	rgoers
	(GC) CSV layouts should not create a new CSVPrinter for each log event. Requires Apache Commons CSV 1.4. Fixes LOG4J2-1385.	ggregory
	Update liquibase-core from 3.4.2 to 3.5.1. Fixes LOG4J2-1398.	ggregory
	Update Apache Commons CSV from 1.3 to 1.4. Fixes LOG4J2-1399.	ggregory
	Added documentation about plugin builders compared to factories. Fixes LOG4J2-1411.	mattsicker
	Fixed minor issues with the 2.6 web site. Fixes LOG4J2-1394.	mattsicker,mikes

Release 2.6 – 2016-05-25

Type	Changes	By
	(GC) Added support for garbage-free logging in steady state. This includes Async Loggers and logging synchronously to the console and to a file, but does not include the AsyncAppender. This release makes the GelfLayout and the main patterns in the PatternLayout garbage-free. Fixes LOG4J2-1270.	rpopma
	(GC) Added manual page on garbage-free logging. Fixes LOG4J2-1297.	rpopma
	(GC) Update Logger wrapper Generator tool to generate methods for the new Logger methods. Fixes LOG4J2-1373.	rpopma
	(GC) GelfLayout does now support garbage-free logging (with compressionType=OFF). Fixes LOG4J2-1356.	mikes
	(GC) Added methods to the Logger interface for logging CharSequence messages. Fixes LOG4J2-1326.	rpopma
	(GC) FileAppender, RollingFileAppender and MemoryMappedFileAppender are now also garbage-free by default. Fixes LOG4J2-1344.	rpopma
	(GC) ConsoleAppender is now garbage-free by default. This logic is reusable for all AbstractOutputStreamAppender subclasses. Fixes LOG4J2-1343.	rpopma
	(GC) Added unrolled varargs methods to Logger API, added Unbox utility to avoid auto-boxing when logging primitive values. Fixes LOG4J2-1278.	rpopma
	(GC) Avoid allocating unnecessary temporary objects in LoggerContext's getLogger methods. Fixes LOG4J2-1318.	rpopma
	(GC) Avoid allocating unnecessary temporary objects in MarkerManager's getMarker methods. Fixes LOG4J2-1333.	rpopma
	(GC) Avoid allocating unnecessary temporary objects in PatternLayout's NamePatternConverter and ClassNamePatternConverter. Fixes LOG4J2-1321.	rpopma
	(GC) Add MessageFactory that avoid allocation by reusing a cached ParameterizedMessage instance. Fixes LOG4J2-1271.	rpopma
	(GC) ParameterizedMessage optimizations to avoid or at least postpone allocating temporary objects. Fixes LOG4J2-1271.	rpopma
	(GC) Provide ThreadLocal-based gc-free caching mechanism in DatePatternConverter for non-webapps. Fixes LOG4J2-1283.	rpopma
	(GC) Add interface StringBuilderFormattable to enable converting Messages and parameters to text without allocating temporary objects. ParameterizedMessage, ObjectMessage, SimpleMessage and ThreadDumpMessage now implement StringBuilderFormattable. Fixes LOG4J2-1293.	rpopma
	(GC) Update PatternLayout to utilize gc-free mechanism for LogEvent processing. Fixes LOG4J2-1291.	rpopma
	(GC) Update RandomAccessFileAppender and RollingRandomAccessFileAppender to utilize gc-free Layout.encode() method. Fixes LOG4J2-1292.	rpopma
	(GC) Add encode(LogEvent, ByteBufferDestination) method to Layout API to enable converting LogEvents to bytes without creating temporary objects. Fixes LOG4J2-1274.	rpopma
	(GC) LoggerConfig.getProperties() should not allocate on each call. Fixes LOG4J2-1281.	rpopma
	(GC) Improve LoggerConfig's data structure for AppenderControl objects to avoid allocating temporary objects during traversal for each log event. Fixes LOG4J2-1272.	rpopma
	(GC) AsyncLogger should use thread-local translator by default. Fixes LOG4J2-1269.	rpopma
	Generate MDC properties as a JSON map in JSONLayout, with option to output as list of map entries. Fixes LOG4J2-623.	rpopma
	Added a YAML layout. Fixes LOG4J2-1362. Thanks to Gary Gregory.	rpopma
	Fixed memory leak related to shutdown hook. Fixes LOG4J2-1387.	rpopma
	Documented benchmark results comparing Log4j 2 performance to other logging libraries. Fixes LOG4J2-1179.	rpopma
	Copying a MutableLogEvent using Log4jLogEvent.Builder should not unnecessarily obtain caller location information. Fixes LOG4J2-1382.	rpopma
	Document dependencies for layouts. Fixes LOG4J2-1011.	mikes
	Pattern to drop first N package parts. Fixes LOG4J2-621. Thanks to Lee Theobald, Kamal Mettananda, Gary Gregory.	ggregory
	Support merging configurations to for a composite configuration. Fixes LOG4J2-494. Thanks to Philipp Knobel.	rgoers
	Option to not log stack traces for logged Throwables in GelfLayout. Fixes LOG4J2-1357.	mikes
	Update SLF4J from 1.7.13 to 1.7.21. Fixes LOG4J2-1375.	rpopma
	Migrate tests from Logback 1.1.3 to 1.1.7. Fixes LOG4J2-1374.	rpopma
	Update Apache Commons CSV from 1.2 to 1.3. Fixes LOG4J2-1384.	ggregory
	XMLLayout indents, but not the first child tag (Event). Fixes LOG4J2-1372. Thanks to Kamal Mettananda, Gary Gregory.	rgoers
	Properties Configuration did not support includeLocation attribute on Loggers. Fixes LOG4J2-1363.	rgoers
	The ConfigurationSource was not saved for BuiltConfigurations so monitor interval had no effect. Fixes LOG4J2-1263.	rgoers
	"xz" compression results in plaintext, uncompressed files. Fixes LOG4J2-1369. Thanks to Alex Birch, Gary Gregory.	ggregory
	(Log4j-internal) Provide message text as CharSequence for some message types to optimize some layouts. Fixes LOG4J2-1365.	mikes
	(Log4j-internal) StatusLogger dropped exceptions when logging parameterized messages. Fixes LOG4J2-1368.	rpopma
	Add an AutoCloseable ThreadContext class: CloseableThreadContext. Fixes LOG4J2-1348. Thanks to Greg Thomas, Gary Gregory.	ggregory
	(Doc) Clarify documentation for properties that control Log4j behaviour. Fixes LOG4J2-1345.	rpopma
	LoggerFactory in 1.2 API module is not compatible with 1.2. Fixes LOG4J2-1336. Thanks to Zbynek Vyskovsky.	ggregory
	No configuration reload is triggered under Windows when replacing the configuration file with one that has older last modified date. Fixes LOG4J2-1354. Thanks to Arkadiusz Adolph.	ggregory
	Exception from Log4jServletContextListener prevents jetty-maven-plugin run-forked. Fixes LOG4J2-1346.
	(Perf) AsyncLogger performance optimization: avoid calling instanceof TimestampMessage in hot path. Fixes LOG4J2-1339.	rpopma
	Improve error handling in the Async Logger background thread: the new default exception handler no longer rethrows the error. Fixes LOG4J2-1324.	rpopma
	Configuration file error does not show cause exception. Fixes LOG4J2-1309.	ggregory
	Add pattern converter for thread id and priority in PatternLayout. Fixes LOG4J2-1299.	ggregory
	Change flow logging text from "entry' to "Enter" and "exit" to "Exit". Fixes LOG4J2-1289.	ggregory
	Made default MessageFactory configurable. Fixes LOG4J2-1284.	rpopma
	Deprecate org.apache.logging.log4j.util.MessageSupplier. Fixes LOG4J2-1280.	ggregory
	Logger methods taking Supplier parameters now correctly handle cases where the supplied value is a Message. Fixes LOG4J2-1280.	rpopma
	FixedDateFormat was incorrect for formats having MMM with the French locale. Fixes LOG4J2-1268.	rpopma
	Add enhanced entry and exit methods. Fixes LOG4J2-1255.	rgoers
	Add shutdown methods to LogManager. Fixes LOG4J2-124.	rgoers
	Creation of a LoggerContext will fail if shutdown is in progress. LogManager will default to SimpleLogger instead. Fixes LOG4J2-1222.	rgoers
	Added async logger Timeout wait strategy and made this the default wait strategy for async loggers. This prevents a rare deadlock that may occur on Solaris. Fixes LOG4J2-1221. Thanks to Michael Barker.	rpopma
	Added option to discard events below a certain log level if the async logger ring buffer or async appender queue is full. Fixes LOG4J2-1080.	rpopma
	Make PatternLayout header and footer accept a pattern. Fixes LOG4J2-1237. Thanks to Mike Calmus, Gary Gregory.	ggregory
	Make header and footer values customizable in JSONLayout. Fixes LOG4J2-1244. Thanks to Anshu Garg, Remko Popma, Gary Gregory.	ggregory
	Make CSV Layout header and footers accept patterns. Fixes LOG4J2-1245.	ggregory
	Dynamic Subject for SMTP Appender. Fixes LOG4J2-1192. Thanks to Jörg Bretschneider, Gary Gregory.	ggregory
	FormattedMessage, MessageFormatMessage and StringFormattedMessage should support passing in a Locale to ensure appropriate formatting. Fixes LOG4J2-1277. Thanks to Gary Gregory, Ludovic Hochet.	ggregory
	TlsSyslogFrame calculates message length incorrectly. Fixes LOG4J2-1260. Thanks to Blake Day, Gary Gregory.	ggregory
	Async DynamicThresholdFilter does not use the log event's context map. Fixes LOG4J2-1258. Thanks to Francis Lalonde.	ggregory
	Incorrect log rotation in last week of year. Fixes LOG4J2-1232. Thanks to Nikolai.	ggregory
	Fixed broken nanotime in pattern layout. Fixes LOG4J2-1248.	rpopma
	JSONLayout doesn't add a comma between log events. Fixes LOG4J2-908. Thanks to Konstantinos Liakos, Patrick Flaherty, Robin Coe, Gary Gregory.	ggregory
	Don't concatenate SYSLOG Messages. Fixes LOG4J2-1230. Thanks to Vladimir Hudec, Ralph Goers, Gary Gregory.	ggregory
	org.apache.logging.log4j.core.net.TcpSocketManager and other classes does not report internal exceptions to the status logger. Fixes LOG4J2-1238.	ggregory
	Fix documentation to specify the correct default wait strategy used by async loggers. Fixes LOG4J2-1212.	rpopma
	Documentation/XSD inconsistencies. Fixes LOG4J2-1215. Thanks to Erik Kemperman.	ggregory
	LoggerMessageSupplierTest and LoggerSupplierTest are Locale sensitive. Fixes LOG4J2-1276. Thanks to Ludovic Hochet.	ggregory
	Update Jackson from 2.7.3 to 2.7.4. Fixes LOG4J2-1380.	ggregory
	Update Jackson from 2.7.0 to 2.7.2. Fixes LOG4J2-1304.	ggregory
	Update LMAX Disruptor from 3.3.2 to 3.3.4. Fixes LOG4J2-1253.	ggregory
	Update SLF4J from 1.7.12 to 1.7.13. Fixes LOG4J2-1219.	ggregory
	Update Jackson from 2.6.3 to 2.6.4. Fixes LOG4J2-1239.	ggregory
	Update Jackson from 2.6.4 to 2.7.0. Fixes LOG4J2-1249.	ggregory
	Update Jackson from 2.7.2 to 2.7.3. Fixes LOG4J2-1351.	ggregory
	Update Liquibase from 3.3.5 to 3.4.2. Fixes LOG4J2-1240.	ggregory
	Update Kafka client from 0.9.0.0 to 0.9.0.1. Fixes LOG4J2-1294.	ggregory
	Update javax.mail from 1.5.4 to 1.5.5. Fixes LOG4J2-1352.	ggregory
	Update Apache Commons Compress from 1.10 to 1.11. Fixes LOG4J2-1358.	ggregory
	Update Google java-allocation-instrumenter from 3.0 to 3.0.1. Fixes LOG4J2-1388.	rpopma
	Misleading Value In Properties Example. Fixes LOG4J2-1233. Thanks to Bahri Gencsoy.	ggregory
	Fix JUL bridge issue where LogRecord.getParameters() is used when null. Fixes LOG4J2-1251. Thanks to Romain Manni-Bucau.	mattsicker
	Fix typo in Flow Tracing documentation. Fixes LOG4J2-1254. Thanks to Josh Trow.	rpopma
	ClassNotFoundException for BundleContextSelector when initialising in an OSGi environment. Fixes LOG4J2-920. Thanks to Ludovic Hochet.	mattsicker
	Remove serializability from classes that don't need it. Fixes LOG4J2-1300.	mattsicker
	Add documentation links to runtime dependencies in each component intro page. Fixes LOG4J2-1303.	mattsicker
	Fix RollingAppenderNoUnconditionalDeleteTest repeat test runs from failing. Fixes LOG4J2-1275. Thanks to Ludovic Hochet.	mattsicker
	Stop throwing unnecessary exception in Log4jServletContextListener.contextDestroyed(). Fixes LOG4J2-1262.	mattsicker
	JeroMqAppender should support layouts. Fixes LOG4J2-1252.	mattsicker
	NullPointerException in MapLookup.lookup if the event is null. Fixes LOG4J2-1227. Thanks to Olivier Lemasle.	mattsicker
	JeroMqAppender should use ShutdownCallbackRegistry instead of runtime hooks. Fixes LOG4J2-1306.	mattsicker
	PatternLayout option to limit length of text. Fixes LOG4J2-1217. Thanks to Thies Wellpott.	mattsicker
	Remove need to pre-specify appender et al. identifiers in property file config format. Fixes LOG4J2-1308.	mattsicker
	Add a Log4jLookup class to help write log files relative to log4j2.xml. Fixes LOG4J2-1050. Thanks to Adam Retter.	mattsicker
	Add JNDI lookup documentation. Fixes LOG4J2-1133.	mattsicker
	JndiLookup mindlessly casts to String and should use String.valueOf(). Fixes LOG4J2-1310.	mattsicker
	org.apache.logging.log4j.core.LoggerContext#updateLoggers should call firePropertyChangeEvent. Fixes LOG4J2-1206.	mattsicker
	Log4jWebInitializerImpl: Use Thread instead of Class for fallback classloader. Fixes LOG4J2-248.	mattsicker
	PatternLayout: Possible variable substitution in equals substitution parameter. Fixes LOG4J2-1169. Thanks to Gerald Kritzinger.	mattsicker
	Update Log4j 1.x migration guide to include information about system property lookup syntax changes. Fixes LOG4J2-1322.	mattsicker
	Fix NoClassDefFoundError in ReflectionUtil on Google App Engine. Fixes LOG4J2-1330.	mattsicker

Release 2.5 – 2015-12-06

Type	Changes	By
	Reduced memory usage of status messages in bounded queue; support zero-length queue that stores no messages. Fixes LOG4J2-324.	rpopma
	Fixed rollover error when copying to a directory mapped to a remote Linux host. Fixes LOG4J2-1173.	rpopma
	Added support for custom delete actions triggered by a rollover. Fixes LOG4J2-435. Thanks to Robert Schaft.	rpopma
	Add PurgePolicy and IdlePurgePolicy to RoutingAppender. Fixes LOG4J2-649. Thanks to Aleksey Zvolinsky.	rgoers
	Remove ConfigurationMonitor. The WatchManager is now used to check for configuration changes. Fixes LOG4J2-1202.	rgoers
	Make KafkaAppender support SerializedLayout. Fixes LOG4J2-1195. Thanks to Melvin Du.	mikes
	Allow rollover to occur at any time. Add CronTriggeringPolicy. Fixes LOG4J2-89.	rgoers
	Allow triggering policy and rollover strategy to be modified during reconfiguration. Fixes LOG4J2-381. Thanks to Anthony Baldocchi.	rgoers
	Add support for JSR 223 scripts in filters and the PatternSelector. Fixes LOG4J2-1136.	rgoers
	Add getters for source and destination file in file rename action. Fixes LOG4J2-1168. Thanks to Steven Swor.	ggregory
	Add getters for classes in org.apache.logging.log4j.core.appender.rolling.action. Fixes LOG4J2-1175.	ggregory
	Added system property to allow users to control whether messages should be formatted in the background. Fixes LOG4J2-898.	rpopma
	Support use-case for JDBC's CommonDataSource.setLogWriter(PrintWriter) and java.sql.DriverManager.setLogWriter(PrintWriter). Fixes LOG4J2-1178.	ggregory
	Support use case for java.sql.DriverManager.setLogStream(PrintStream). Fixes LOG4J2-1187.	ggregory
	Performance improvement when gathering location information. Fixes LOG4J2-1029. Thanks to Stefan Leonhartsberger.	rpopma
	Fixed ThreadLocal leak [AsyncLogger$Info] on Tomcat when using AsyncLoggerContextSelector. Fixes LOG4J2-1172.	rpopma
	Fixed memory leak when log4j jars are in Tomcat's lib folder. Fixes LOG4J2-1176.	rpopma
	Logger cache does not account for message factory. Fixes LOG4J2-1180. Thanks to Mikael Ståldal.	ggregory
	Documentation: fixed minor issues with the site and manual pages. Fixes LOG4J2-879.	rpopma
	RollingFileAppender should also roll over when log event time is equal to rollover time, not only when later. Fixes LOG4J2-999. Thanks to Joan Balagueró.	rpopma
	Fixed bug where omitting the <display-name> element in web.xml caused incorrect log4j initialization, resulting in memory leaks when the web application was stopped or reloaded. Fixes LOG4J2-873. Thanks to Martin Dickins, LC, Luke Woodward.	rpopma
	Better web app support for async loggers: Fixed a memory leak that occurred when the logging jars are placed in the container's classpath and the configuration file uses AsyncRoot/AsyncLogger. The problem was that the first web application started the Disruptor background thread [AsyncLoggerConfig-1] but did not stop it until all web apps are stopped. Each web application now has its own Disruptor which is stopped/started together with the web app. Fixes LOG4J2-323.	rpopma
	Better web app support for async loggers: it is now possible to place the logging jars in the container's classpath when making all loggers asynchronous by using AsyncLoggerContextSelector. This fixes a problem where logging would stop working after stopping and restarting a web application. Fixes LOG4J2-493.	rpopma
	Use servlet context name for logger context name when available. Fixes LOG4J2-1171.	rpopma
	Fixed a ThreadLocal memory leak in Tomcat8 that mentions AsyncLoggers when Async Loggers are not used. Fixes LOG4J2-1159.	rpopma
	AbstractConfiguration executor should use a DaemonThreadFactory. Fixes LOG4J2-1166.	rpopma
	Improve Log4j initialization status messages. Fixes LOG4J2-1165.	rpopma
	Web site corrections and updates. Fixes LOG4J2-1156.	rpopma
	Log4J JUL adapter is using MessageFormat on String passed by java.util.function.Supplier<String>. Fixes LOG4J2-1158. Thanks to Michael Fortin, Gary Gregory.	ggregory
	org.apache.logging.log4j.core.Logger should be serializable. Fixes LOG4J2-801.	mattsicker
	Fix compilation error for classes annotated with @Plugin. Fixes LOG4J2-1157. Thanks to Norbert Bartels.	mattsicker
	Fix plugin documentation error about Converters. Fixes LOG4J2-948. Thanks to Andrew Flower.	mattsicker
	Prefix all thread names Log4j creates with "Log4j2-". Fixes LOG4J2-1193.	ggregory
	Documentation does not match parameters for LoggerNameLevelRewritePolicy. Fixes LOG4J2-1194. Thanks to Adam Brin.	ggregory
	MongoDbConnection does not close MongoClient. Fixes LOG4J2-1196. Thanks to René Zanner.	mattsicker
	Update Jackson from 2.6.2 to 2.6.3. Fixes LOG4J2-1174.	ggregory
	Update kafka-clients from 0.8.2.2 to 0.9.0.0. Fixes LOG4J2-1207.	ggregory

Release 2.4.1 – 2015-10-08

Type	Changes	By
	Allow PatternLayout to select a pattern to use based on some selection criteria. Fixes LOG4J2-1129.	rgoers
	Add %equals to PatternLayout to test and replace patterns with strings. Fixes LOG4J2-1145.	ggregory
	Add %equalsIgnoreCase to PatternLayout to test and replace patterns with strings. Fixes LOG4J2-1147.	ggregory
	Add %notEmpty to PatternLayout to avoid output of patterns where all variables are empty. Fixes LOG4J2-1146.	ggregory
	Add possibility to set shutdown timeout on AsyncAppender. Fixes LOG4J2-1020.	mikes
	Fixed NullPointerException when only root logger is defined (and no named loggers) in configuration properties file. Fixes LOG4J2-1153.	rpopma
	Fixed bug where headers were not being written to first file with RollingFileAppender. Fixes LOG4J2-1140.	rpopma
	Fixed bug where PatternLayout predefined date pattern with time zone always renders default date format. Fixes LOG4J2-1149.	rpopma
	Fixed Log4jLookup. Fixes LOG4J2-1050.	rpopma
	Fix potential memory leak in web applications by using a straight ThreadLocal field instead of subclassing ThreadLocal. Fixes LOG4J2-1142.	rpopma
	Compression on rollover was broken: log file was renamed to .zip but not compressed. Fixes LOG4J2-1135.	rpopma
	log4j2.xml cannot be parsed on Oracle Weblogic 12c. Fixes LOG4J2-1127.	ggregory
	Do not use MongoDB driver 2.13.3 deprecated methods. Fixes LOG4J2-1132.	ggregory
	Add %markerSimpleName in pattern layout should evaluate to marker name (not toString()). Fixes LOG4J2-1144.	ggregory
	Web site corrections and updates. Fixes LOG4J2-1126.	ggregory
	Performance improvement: backport Java 8 fast ISO-8859-1 String to byte[] encoder to AbstractStringLayout. Fixes LOG4J2-1151.	rpopma
	Performance improvement when converting Strings to byte[] arrays. Fixes LOG4J2-935.	rpopma
	Update MongoDB driver from 2.13.3 to 3.0.4. Fixes LOG4J2-1040.	ggregory
	Reuse StringBuilder to improve performance for String-based layouts: CSV, GELF, HTML, RFC524, Syslog. Fixes LOG4J2-1128.	ggregory
	Update mongo-java-driver from 2.13.2 to 2.13.3. Fixes LOG4J2-1131.	ggregory
	Do not use Jackson deprecated methods. Fixes LOG4J2-1138.	ggregory
	Update Jackson from 2.6.1 to 2.6.2. Fixes LOG4J2-1139.	ggregory
	Update kafka-clients from 0.8.2.1 to 0.8.2.2. Fixes LOG4J2-1150.	ggregory

Release 2.4 – 2015-09-20

Type	Changes	By
	Add support for configuration via Properties. Fixes LOG4J2-635.	rgoers
	Add ConfigurationBuilder for programmatic configuration. Fixes LOG4J2-952.	rgoers
	Update Java platform from Java 6 to 7. From this version onwards, log4j 2 requires Java 7. Fixes LOG4J2-1017.	ggregory
	Added support for Java 8 lambda expressions to lazily construct a log message only if the requested log level is enabled. Fixes LOG4J2-599.	rpopma
	Updated Logger wrapper generator tool to add Java 8 lambda support for custom log levels. Fixes LOG4J2-1118.	rpopma
	New Appender for Apache Kafka. Fixes LOG4J2-1107. Thanks to Mikael Ståldal.	ggregory
	New publisher Appender for ZeroMQ (using JeroMQ). Fixes LOG4J2-1113. Thanks to Gary Gregory.	ggregory
	Add Comma Separated Value (CSV) layouts for parameter and event logging. Fixes LOG4J2-1088. Thanks to Gary Gregory.	ggregory
	PatternLayout timestamp formatting performance improvement: replaced synchronized SimpleDateFormat with Apache Commons FastDateFormat. This and better caching resulted in a ~3-30X faster timestamp formatting. Fixes LOG4J2-812.	rgoers
	PatternLayout timestamp formatting performance improvement: predefined date formats (and variants using a period '.' millisecond separator instead of ',') are now formatted ~2-10X faster than other date formats. Fixes LOG4J2-1097.	rpopma
	Improved performance of ParameterizedMessage::getFormattedMessage by ~2X. Fixes LOG4J2-1096.	rpopma
	LoggerConfig performance improvements: avoid unnecessary lock acquisition, use more efficient data structure. Fixes LOG4J2-1120.	rpopma
	PatternLayout performance improvement by caching and reusing a ThreadLocal StringBuilder. Fixes LOG4J2-1125.	rpopma
	Fixed potential race condition on reconfiguration. Introduced ReliabilityStrategy to facilitate switching between different mechanisms for preventing log events from being dropped on reconfiguration. Fixes LOG4J2-1121.	rpopma
	Add thread name to status logger layout. Fixes LOG4J2-1114.	ggregory
	Core Configurator.initialize(String, ClassLoader, String) fails to work when config location is a file path. Fixes LOG4J2-1123.	ggregory
	OutputStreamManager in ConsoleAppender leaking managers. Fixes LOG4J2-1117. Thanks to Marcus Thiesen.	ggregory
	Write pending events to Flume when the appender is stopped. Fixes LOG4J2-1044.	rgoers
	NullPointerException when passing null to java.util.logging.Logger.setLevel(). Fixes LOG4J2-1108. Thanks to Mikael Ståldal.	ggregory
	org.apache.logging.log4j.jul.CoreLogger.setLevel() checks for security permission too late. Fixes LOG4J2-1110.	ggregory
	Removed experimental interface LevelLogger which got committed to master by mistake.	rpopma
	Pass log event when interpolating logger properties. Fixes LOG4J2-1010.	rgoers
	Add Core Configurator APIs to change a logger's level. Fixes LOG4J2-1090.	ggregory
	Add API org.apache.logging.log4j.Level.isInRange(Level, Level). Fixes LOG4J2-1105. Thanks to Gary Gregory.	ggregory
	Add a LevelRangeFilter class. Fixes LOG4J2-1106. Thanks to Gary Gregory.	ggregory
	Added support for system nanosecond time in pattern layout. Fixes LOG4J2-1074.	rpopma
	Added support for compressing to bzip2 format on file rollover. Fixes LOG4J2-1075.	rpopma
	Support additional Apache Commons Compress compression formats on rollover: Deflate, Pack200, XY. Fixes LOG4J2-1077.	ggregory
	New module for Liquibase integration. Fixes LOG4J2-767. Thanks to Mikael Ståldal.	ggregory
	New RewritePolicy for changing level of a log event. Fixes LOG4J2-1023. Thanks to Mikael Ståldal.	ggregory
	Add a way to route messages based on the %marker in Layout for RoutingAppender. Fixes LOG4J2-1015. Thanks to Daniel Marcotte.	ggregory
	Add a Log4jLookup class to help write log files relative to log4j2.xml. Fixes LOG4J2-1050. Thanks to Adam Retter.	ggregory
	Add API org.apache.logging.log4j.LogManager.getFormatterLogger(). Fixes LOG4J2-1057.	ggregory
	Expose Log4jContextFactory's ShutdownCallbackRegistry. Fixes LOG4J2-1066. Thanks to Charles Allen.	ggregory
	Misleading StatusLogger WARN event in LogManager with java.util.Map. Fixes LOG4J2-1084. Thanks to Philipp Schneider.	ggregory
	NoClassDefFoundError when starting app on Google App Engine. Fixes LOG4J2-1051. Thanks to Lukasz Lenart.	ggregory
	ExtendedThrowablePatternConverter does not print suppressed exceptions. Fixes LOG4J2-684. Thanks to Joern Huxhorn, Mauro Molinari.	ggregory
	Improper handling of JSON escape chars when deserializing JSON log events. Fixes LOG4J2-1069. Thanks to Sam Braam.	ggregory
	Exceptions not logged when using TcpSocketServer + SerializedLayout. Fixes LOG4J2-1068. Thanks to Andy McMullan.	ggregory
	ThrowableProxy getExtendedStackTraceAsString throws NPE on deserialized nested exceptions. Fixes LOG4J2-1067. Thanks to Sam Braam.	ggregory
	AsyncAppender now resets the thread interrupted flag after catching InterruptedException. Fixes LOG4J2-1049. Thanks to Robert Schaft.	rpopma
	FileConfigurationMonitor unnecessarily calls System.currentTimeMillis() causing high CPU usage. Fixes LOG4J2-1048. Thanks to Nikhil.	rpopma
	Backward compatibility issue in log4j-1.2-api NDC pop() and peek(). Fixes LOG4J2-1037. Thanks to Marc Dergacz.	ggregory
	Custom java.util.logging.Level gives null Log4j Level and causes NPE. Fixes LOG4J2-1025. Thanks to Mikael Ståldal.	ggregory
	SimpleLogger creates unnecessary Map objects by calling ThreadContext.getContext() instead of getImmutableContext(). Fixes LOG4J2-1033. Thanks to Mikael Ståldal.	ggregory
	HighlightConverter does not obey noConsoleNoAnsi. Fixes LOG4J2-1026.	ggregory
	ZipCompressAction leaves files open until GC when an IO error takes place. Fixes LOG4J2-1019.	ggregory
	GzCompressAction leaves files open until GC when an IO error takes place. Fixes LOG4J2-1020.	ggregory
	Incorrect documentation for layout default charset. Fixes LOG4J2-1038. Thanks to Gili.	ggregory
	Socket and Syslog appenders don't take timeout into account at startup. Fixes LOG4J2-1042. Thanks to Guillaume Turri.	ggregory
	Circular suppressed Exception throws StackOverflowError. Fixes LOG4J2-934. Thanks to Kenneth Gendron.	ggregory
	Circular Exception cause throws StackOverflowError. Fixes LOG4J2-1046. Thanks to Kenneth Gendron.	ggregory
	Use System.nanoTime() to measure time intervals. Fixes LOG4J2-982. Thanks to Mikhail Mazurskiy.	ggregory
	Externalize log4j2.xml via URL resource. Fixes LOG4J2-1045. Thanks to Günter Albrecht.	ggregory
	Log4jMarker#contains(String) does not respect org.slf4j.Marker contract. Fixes LOG4J2-1058. Thanks to Daniel Branzea.	ggregory
	Log4jMarker#contains(Marker) does not respect org.slf4j.Marker contract. Fixes LOG4J2-1060.	ggregory
	Log4jMarker#remove(Marker) does not respect org.slf4j.Marker contract. Fixes LOG4J2-1061.	ggregory
	Log4jMarker#add(Marker) does not respect org.slf4j.Marker contract. Fixes LOG4J2-1062.	ggregory
	org.apache.logging.slf4j.Log4jMarker does not implement org.slf4j.Marker.equals(Object) org.slf4j.Marker.hashCode(). Fixes LOG4J2-1064.	ggregory
	Header in layout should not be written on application startup if appending to an existing file. Fixes LOG4J2-1030. Fixes LOG4J2-889. Thanks to Maciej Karaś, Kenneth Leider.	rpopma
	Clarify documentation for combining async with sync loggers. Fixes LOG4J2-918.	rpopma
	GelfLayout throws exception if some log event fields are null. Fixes LOG4J2-1078. Thanks to Mikael Ståldal.	ggregory
	Support batchSize in FlumeAvroManager. Fixes LOG4J2-1044.	rgoers
	Define org.apache.logging.log4j.Marker.equals(Object) and org.apache.logging.log4j.Marker.hashCode(). Fixes LOG4J2-1065.	ggregory
	Avoid creating temporary array object in org.apache.logging.slf4j.Log4jMarker.iterator(). Fixes LOG4J2-1063.	ggregory
	log4j-web-2.1 should workaround a bug in JBOSS EAP 6.2. Fixes LOG4J2-890. Thanks to Hassan Kalaldeh, Robert Andersson, Remko Popma.	ggregory
	MongoDB appender, username and password should be optional. Fixes LOG4J2-403. Thanks to Poorna Subhash P, Jeremy Lautman.	ggregory
	Log4j2 tries to SystemClassLoader when running on Google AppEngine. Fixes LOG4J2-1035.	ggregory
	Allow a list of keys to be specified in the MDC pattern converter. Fixes LOG4J2-1022.	rgoers
	Fix FindBugs DM_DEFAULT_ENCODING bug in SimpleLogger.logMessage() and simplify code. Fixes LOG4J2-959.	ggregory
	Update Apache Flume from 1.5.2 to 1.6.0. Fixes LOG4J2-1036.	ggregory
	Update MongoDB driver from 2.11.2 to 2.13.2. Fixes LOG4J2-1041.	ggregory
	Update database tests from H2 1.3.175 to 1.3.176. Fixes LOG4J2-1018.	ggregory
	Update Java Mail from 1.5.2 to 1.5.4. Fixes LOG4J2-1070.	ggregory
	Update Jackson from 2.5.3 to 2.5.4. Fixes LOG4J2-1079.	ggregory
	Update Jackson from 2.5.4 to 2.6.0. Fixes LOG4J2-1879.	ggregory
	Update Jackson from 2.6.0 to 2.6.1. Fixes LOG4J2-1092.	ggregory
	Update Apache Commons Compress from 1.9 to 1.10. Fixes LOG4J2-1104.	ggregory

Release 2.3 – 2015-05-09

Type	Changes	By
	Incorrectly defined compressionType parameter to GelfLayout. Fixes LOG4J2-1009. Thanks to Mikael Ståldal.	ggregory
	org.apache.logging.log4j.core.config.plugins.util.ResolverUtil.extractPath(URL) incorrectly converts '+' characters to spaces. Fixes LOG4J2-1008. Thanks to Ralph Goers, Gary Gregory.	ggregory
	org.apache.logging.log4j.core.util#fileFromUri(URI uri) incorrectly converts '+' characters to spaces. Fixes LOG4J2-1007. Thanks to Ralph Goers, Gary Gregory.	ggregory
	JUL Logger.throwing is mis-mapped to ERROR when it should be TRACE. Fixes LOG4J2-1003. Thanks to Dan Armbrust.	ggregory
	System.out no longer works after the Console appender and JANSI are initialized. Fixes LOG4J2-965. Thanks to Khotyn Huang.	ggregory
	Make org.apache.logging.log4j.core.Logger#updateConfiguration protected. Fixes LOG4J2-998. Thanks to Mariano Gonzalez.	ggregory
	Move UTF-8 constant from Charsets to Constants class. Remove Charsets class. Fixes LOG4J2-995.	rgoers
	Deadlock would occur if appender thread creates a new Logger during reconfiguration. Fixes LOG4J2-993.	rgoers
	Async root logger config should default includeLocation to false. Fixes LOG4J2-991. Thanks to Ryan Rupp.	rpopma
	AbstractFilter should not implement equals() and hashCode(). Fixes LOG4J2-985. Thanks to Sean Dawson.	rpopma
	PatternLayout %highlight to support noConsoleNoAnsi like %style. Fixes LOG4J2-984. Thanks to Jonas Höpfner.	ggregory
	Truncate from the end of text format modifier. Fixes LOG4J2-926. Thanks to David Ohana.	ggregory
	Numerical overflow in BurstFilter not handled correctly. Fixes LOG4J2-980. Thanks to Mikhail Mazurskiy.	ggregory
	Incorrect unlock in ProviderUtil. Fixes LOG4J2-981. Thanks to Mikhail Mazurskiy.	ggregory
	KeyStoreConfiguration.createKeyStoreConfiguration() ignores keyManagerFactoryAlgorithm. Fixes LOG4J2-966.	ggregory
	Using monitorInterval with YAML config file format causes JSONParseException. Fixes LOG4J2-976. Thanks to Matt Quinn.	ggregory
	StringFormattedMessage serialization is incorrect. Fixes LOG4J2-964. Thanks to Jonne Jyrylä.	ggregory
	A new StatusLoggerAdmin listener is added to StatusLogger every time the log is reconfigured. Fixes LOG4J2-947. Thanks to Stefan Wehner.	ggregory
	SyslogLayout contains extra space. Fixes LOG4J2-968. Thanks to Paul D Johe.	ggregory
	log4j2.component.properties not read for all properties. Fixes LOG4J2-967. Thanks to Stefan Wehner.	ggregory
	Another bad priority in Syslog messages. Fixes LOG4J2-971. Thanks to Paul D Johe.	ggregory
	org.apache.logging.log4j.core.net.ssl.TlsSyslogInputStreamReader does not need to create temp Integer objects. Fixes LOG4J2-972.	ggregory
	Typo in EventLogger documentation. Fixes LOG4J2-974. Thanks to Daniel Galán y Martins.	ggregory
	Update LMAX Disruptor from 3.3.0 to 3.3.2. Fixes LOG4J2-988.	ggregory
	Migrate tests from Logback 1.1.2 to 1.1.3. Fixes LOG4J2-987.	ggregory
	Update tests to use ActiveMQ from 5.10 to 5.11.1. Fixes LOG4J2-988.	ggregory
	Update Jackson from 2.5.1 to 2.5.3. Fixes LOG4J2-1004.	ggregory
	Update Slf4j from 1.7.7 to 1.7.12. Fixes LOG4J2-1005.	ggregory

Release 2.2 – 2015-02-22

Type	Changes	By
	(JMX) To avoid memory leaks when web applications are restarted, JMX notifications are sent from the caller thread in web applications. For non-web applications notifications are sent from a background thread as before. Fixes LOG4J2-938. Thanks to Mauro Molinari.	rpopma
	Missing toUpperCase(Locale.ENGLISH). Fixes LOG4J2-957. Thanks to fatih guleryuz.	ggregory
	Manual refers to Route "AppenderRef" attribute, should be "ref". Fixes LOG4J2-956. Thanks to David Kellerman.	ggregory
	Documentation: clarify system properties to control status logger, improve troubleshooting FAQ entry. Fixes LOG4J2-955.	rpopma
	Incorrect attribute name in PropertiesRewritePolicy example. Fixes LOG4J2-950. Thanks to Joel Edwards.	ggregory
	Log4j Flume appender is not adding millisecond to the event headers when the event is logged at 000 milliseconds. Fixes LOG4J2-944. Thanks to Vinayaka Ramachandra.	ggregory
	Allow JSON layout to create one compact log record per line. Fixes LOG4J2-941. Thanks to Konstantinos Liakos.	ggregory
	HTML layout should not use attribute minimalization for hr noshade. Fixes LOG4J2-933. Thanks to ppiman at gmail.com.	ggregory
	Specify the SyslogAppender connect timeout value as part of the configuration. The SyslogAppender takes a new parameter connectTimeoutMillis. Fixes LOG4J2-895.	ggregory
	Specify the SocketAppender connect timeout value as part of the configuration. The SyslogAppender takes a new parameter connectTimeoutMillis. Fixes LOG4J2-899.	ggregory
	Log4j 1.2 Bridge doesn't map level ALL correctly in Category.getEffectiveLevel(). Fixes LOG4J2-924. Thanks to Ryan Rupp.	ggregory
	ConsoleAppender is missing @PluginFactory annotation at createAppender method. Fixes LOG4J2-931. Thanks to Robert Gacki.	ggregory
	Logging system fails to initialize if XInclude API is not available. Fixes LOG4J2-919. Thanks to David Johle.	ggregory
	ThrowableProxy.getExtendedStackTraceAsString causes NullPointerException. Fixes LOG4J2-914. Thanks to Kaj Bjurman.	ggregory
	XML configuration does not report full error message for XInclude parser configuration problems. Fixes LOG4J2-912.	ggregory
	ClassLoaderContextSelector uses ClassLoader.toString() as a key. Fixes LOG4J2-903. Thanks to Mauro Molinari.	ggregory
	ThrowableProxy throws NoClassDefFoundError. Fixes LOG4J2-834. Thanks to Nikita Koval, Leonard Broman, Thiago Kronig.	ggregory
	NullPointerException on filter when mapping JUL to Log4j2. Fixes LOG4J2-893.	ggregory
	JUL adapter does not map Log4j'2 FATAL level to a JUL level. Fixes LOG4J2-892.	ggregory
	AbstractLifecycle should not implement equals() and hashCode(). Fixes LOG4J2-881. Thanks to Mariano Gonzalez.	ggregory
	Javadoc for org.apache.log4j.BasicConfigurator.configure() is incorrect. Fixes LOG4J2-897.	ggregory
	AbstractLifecycle should not implement equals() and hashCode(). Fixes LOG4J2-891.	ggregory
	[docs] Using Log4j 2 in Web Applications: Update example (Log4jWebLifeCycle is not visible). Fixes LOG4J2-946. Thanks to artemonster.	ggregory
	Update docs for SyslogAppender: "No structured id name was supplied". Fixes LOG4J2-901. Thanks to Tihomir Meščić, Siegfried Greisinger.	ggregory
	Update from Jackson 2.5.0 to 2.5.1. Fixes LOG4J2-958.	ggregory
	Update from Jackson 2.4.4 to 2.5.0. Fixes LOG4J2-925.	ggregory
	Update Jackson from 2.4.3 to 2.4.4. Fixes LOG4J2-910.	ggregory
	Update Jackson from 2.4.2 to 2.4.3. Fixes LOG4J2-881.	ggregory
	Update maven-core from 3.1.0 to 3.2.3. Fixes LOG4J2-882.	ggregory
	Update tests from org.apache.felix.framework 4.2.1 to 4.4.1. Fixes LOG4J2-883.	ggregory
	Update org.eclipse.osgi from 3.6.0 to 3.7.1. Fixes LOG4J2-884.	ggregory
	Update Apache Flume from 1.5.0.1 to 1.5.2. Fixes LOG4J2-900.	ggregory

Release 2.1 – 2014-10-19

Type	Changes	By
	Some typo fixes and enhancements for the site. Fixes LOG4J2-676. Thanks to Stefan Bodewig.	rgoers
	Add ShutdownCallbackRegistry interface for customizable shutdown callback handling. This is particularly useful for application servers that wish to integrate with Log4j 2. Fixes LOG4J2-868.	mattsicker
	Documentation: fixed missing closing parenthesis in code example. Fixes LOG4J2-866. Thanks to Gerard Weatherby.	rpopma
	Fixed classloader issue that prevented Log4j from finding the implementation when used in a custom Ant task. Fixes LOG4J2-862. Thanks to Michael Sutherland.	mattsicker
	Supported filtering on custom log levels in configuration. Fixes LOG4J2-589.	rpopma
	Documentation: fix broken links on left navigation Extending Log4j Configuration sub-menu. Fixes LOG4J2-861.	rpopma
	Documentation: add sections on the JUL Adapter, IO Streams and NoSQL Appenders to the Maven and Ivy page. Fixes LOG4J2-856.	rpopma
	Documentation: clarified why log4j-core is a compile time dependency in Maven and Ivy page. Fixes LOG4J2-797. Thanks to Andreas Rytina.	rpopma
	Documentation: fix broken links on Appenders manual page. Fixes LOG4J2-855.	rpopma
	Prevent NPE when configuration with AsyncLogger/AsyncRoot is reloaded. Fixes LOG4J2-807.	rpopma
	Add a Java lookup to provide nicely formatted runtime version information. Fixes LOG4J2-848.	ggregory
	Move reflection utility class to API's private utility classes. Fixes LOG4J2-809.	mattsicker
	Add 2.1.0 to compatible versions in Log4j API ProviderUtil and update Log4jAPIVersion to 2.1.0 in core META-INF/log4j-provider.properties. Fixes LOG4J2-845.	mattsicker
	Documentation: added Runtime Dependencies link to left nav-bar on site. Fixes LOG4J2-833.	rpopma
	Documentation: added section on XInclude to user manual Configuration page. Fixes LOG4J2-816.	rpopma
	Documentation: fixed minor issues with Log4j2 web site/documentation. Fixes LOG4J2-678. Thanks to Matt Sicker.	rpopma
	Update JMH to 1.1 from 0.7.2. Fixes LOG4J2-844.	rpopma
	Migrate JpaHyperSqlAppenderTest JUnit performance test to log4j-perf. Fixes LOG4J2-843.	rpopma
	Migrate JpaH2AppenderTest JUnit performance test to log4j-perf. Fixes LOG4J2-842.	rpopma
	Migrate JdbcHyperSqlAppenderTest JUnit performance test to log4j-perf. Fixes LOG4J2-841.	rpopma
	Migrate JdbcH2AppenderTest JUnit performance test to log4j-perf. Fixes LOG4J2-840.	rpopma
	Respect external interrupt signal to allow application shutdown after joining AsyncAppender thread. Fixes LOG4J2-830.	rpopma
	MarkerManager Log4jMarker.hasParents() returns opposite of correct result. Fixes LOG4J2-813. Thanks to David Erichsen, Brandon Barry.	ggregory
	Documentation: fixed capitalization inconsistency in user manual example config. Fixes LOG4J2-785.	rpopma
	Fixed issue in RollingFile filePattern: backslashes are path separators, not escape characters. Fixes LOG4J2-829.	rpopma
	Add the Log4j IOStreams component. Fixes LOG4J2-547.	mattsicker
	Added Memory-Mapped File Appender. Fixes LOG4J2-431. Thanks to Claude Mamo.	rpopma
	ThrowableProxy fails if a class in logged stack trace throws java.lang.Error from initializer. Fixes LOG4J2-832. Thanks to Seth Leger.	ggregory
	Documentation: updated FAQ "which jars" diagrams for JUL bridge and 2.1 version. Fixes LOG4J2-831.	rpopma
	Support use of TypeConverter classes through the standard Plugin system. Fixes LOG4J2-827.	mattsicker
	Avoid ConverterKey plugin clashes by using a more predictable plugin loading infrastructure. Plugins have been segmented into three parts: class path, user-specified packages, and OSGi bundles. Fixes LOG4J2-745. Thanks to Scott Harrington.	mattsicker
	Fixed plugin scanning redundancy causing massive slowdowns in certain environments. Fixes LOG4J2-798. Thanks to Scott Harrington.	mattsicker
	Reduced CachedClock thread contention. Fixes LOG4J2-753.	rpopma
	Fixed memory leak in Tomcat 6 caused by clock background threads unintentionally started by Tomcat after web application stop. Fixes LOG4J2-819. Thanks to Gary Gregory.	mattsicker
	Add simple validation constraint annotations for the Plugin system. Fixes LOG4J2-825.	mattsicker
	Implement a GELF layout. Fixes LOG4J2-428. Thanks to Mark Paluch, Mikael Ståldal.	ggregory
	FlumePersistentManager now handles LockConflictExceptions in Berkeley Db when sending a batch. Fixes LOG4J2-391. Thanks to Kamal Bahadur.	rgoers
	Remove invalid Oracle Maven repository. Fixes LOG4J2-782.	mattsicker
	Update Spring Framework to 3.2.11.RELEASE from 3.2.8.RELEASE. Fixes LOG4J2-780.	mattsicker
	Unify the two JMS appenders into a single appender. Configurations written for 2.0 will still work in 2.1+. Fixes LOG4J2-815.	mattsicker
	Add java.util.logging implementation based on log4j-api. See log4j-jul documentation for more details. Fixes LOG4J2-608.	mattsicker
	Fixed issue where log4j-to-slf4j did not work correctly with SLF4J Simple Logger. Fixes LOG4J2-796.	rpopma
	SimpleLogger throws ArrayIndexOutOfBoundsException for an empty array. Fixes LOG4J2-811. Thanks to Yogesh Rao.	ggregory
	Fix OSGi Import-Package problem with the JMS API. Fixes LOG4J2-663. Thanks to Florian Brunner.	mattsicker
	Add support for custom SLF4J Markers in log4j-slf4j-impl module. Fixes LOG4J2-793.	mattsicker
	PatternLayout should use platform character encoding by default, not UTF-8. Fixes LOG4J2-783. Thanks to Minglei Lee.	rpopma
	Add lookup for application main arguments. Fixes LOG4J2-771.	ggregory
	Add lookup for JVM arguments. Fixes LOG4J2-787.	ggregory
	Update Jackson to 2.4.2 from 2.4.1 (for XML and JSON processing). Fixes LOG4J2-790.	ggregory
	Incomplete documentation for JSONLayout. Fixes LOG4J2-766. Thanks to Bruno P. Kinoshita.	ggregory
	All life cycle implementations should be serializable. This is still work in progress. Fixes LOG4J2-800.	ggregory
	org.apache.logging.log4j.core.Logger should be serializable. This is still work in progress. Fixes LOG4J2-801.	ggregory
	Update javax.mail to 1.5.2 from 1.5.0. Fixes LOG4J2-810.	ggregory
	Update org.eclipse.persistence.jpa to 2.5.2 from 2.5.1. Fixes LOG4J2-822.	ggregory
	FlumeAppender: maxDelay not in seconds, but milliseconds. Add time scale to some settings, for example maxDelayMillis instead of maxDelay. The old names are aliased for compatibility. Fixes LOG4J2-867.	ggregory

Release 2.0.2 – 2014-08-16

Type	Changes	By
	Update Apache Flume to 1.5.0.1 from 1.5.0. Fixes LOG4J2-775.	ggregory
	Site: log4j-core component pages were still using the old logo. Fixes LOG4J2-773.	rpopma
	Documentation improvement: link to dependency tree from log4j-core component page, link to log4j-core component page from FAQ page. Fixes LOG4J2-760.	rpopma
	Resolved race condition that caused log file rotation to fail with error: "Unable to create directory ...". Fixes LOG4J2-679.	rpopma
	Prevent application from hanging when PatternLayout configuration has opening '{' but no closing '}'. Fixes LOG4J2-726.	rpopma
	Startup takes a long time if you have empty packages attribute. Fixes LOG4J2-769. Thanks to Scott Harrington.	rpopma
	Improved asynchronous loggers and appenders to ensure the formatted message does not change even if parameters are modified by the application. (ParameterizedMessage was already safe.) Improved documentation. Fixes LOG4J2-763. Thanks to Stephen Connolly.	rpopma
	Emit warning message to console if no configuration file found. Fixes LOG4J2-729.	rpopma
	Improve warning message when missing log4j-core in the classpath. Fixes LOG4J2-765.	rpopma
	Clarified in documentation that Commons Logging jar is required when using log4j-jcl. Fixes LOG4J2-722.	rpopma
	Clarified in documentation that SLF4J API jar is required when using log4j-slf4j-impl. Fixes LOG4J2-723.	rpopma
	Allow Log4jContextFactory subclasses to specify a custom ContextSelector. Fixes LOG4J2-730.	rpopma
	Fixed various minor site/documentation issues, mostly versioning related. Fixes LOG4J2-759.	rpopma
	Prevent JUnit test from creating unnecessary Log4j2Plugins.dat during build. Fixes LOG4J2-756. Thanks to Scott Harrington.	rpopma

Release 2.0.1 – 2014-07-29

Type	Changes	By
	Avoid unnecessary Clock calls when TimestampMessage is logged. Fixes LOG4J2-744. Thanks to Scott Harrington.	rpopma
	Improved error message if configuration file not found. Fixes LOG4J2-704.	rpopma
	Webapp configuration page has incorrect class name. Fixes LOG4J2-750. Thanks to Mike Calmus.	ggregory
	Retain the default date pattern after fixing the ISO8601 pattern. Fixes LOG4J2-749. Thanks to Scott Harrington.	rpopma
	DatePatternConverter ISO8601_PATTERN now conforms to ISO8601. Fixes LOG4J2-670.	rpopma
	Reinstate the package configuration attribute for discovering custom plugins. Fixes LOG4J2-741.	rpopma
	XInclude not working with relative path. Fixes LOG4J2-742. Thanks to Pascal Chollet.	ggregory
	Fixed typo in webapp manual regarding sample web.xml file. Fixes LOG4J2-740. Thanks to Kosta Krauth.	mattsicker
	RollingFileManager deadlock if async action thread fails to start. Fixes LOG4J2-738. Thanks to Timothy Stack.	ggregory
	Fixed log4j-bom so that it won't specify a default scope on any third party dependencies. Fixes LOG4J2-736.	mattsicker
	Fixed log4j-bom so that it won't interfere with spring-bom and others. Fixes LOG4J2-735.	mattsicker
	Updated documentation regarding extensions to LoggerContextFactory and Log4j 2 providers. Fixes LOG4J2-731.	mattsicker
	Fixed ClassLoader issues in loading Log4j providers in an OSGi environment. Fixes LOG4J2-373.	mattsicker
	Added WebLoggerContextUtils class to log4j-web for helper methods useful for asynchronous servlets. Fixes LOG4J2-725.	mattsicker
	Added documentation for Custom Levels and Custom Loggers. Fixes LOG4J2-710.	rpopma
	Correctly handle NetworkOnMainThreadException thrown on Android during Log4j2 initialization. Fixes LOG4J2-719.	rpopma
	Automatically disable log4j JMX when detecting we are running on Android. Fixes LOG4J2-716.	rpopma
	Fixed AbstractDatabaseManager to close connection on writeInternal error. Fixes LOG4J2-657. Thanks to Stefan Wehner.	rpopma
	Android: java.lang.VerifyError: org/apache/logging/log4j/core/util/Closer. Fixes LOG4J2-713. Thanks to Nelson Melina.	ggregory
	Android: Could not find class 'javax.naming.InitialContext', referenced from method org.apache.logging.log4j.core.lookup.JndiLookup.lookup. Fixes LOG4J2-703. Thanks to Nelson Melina.	ggregory
	Update to LMAX Disruptor 3.3.0 from 3.2.1. Fixes LOG4J2-732.	ggregory
	Update to latest Jackson jars from the 2.4.1.X line. Fixes LOG4J2-733.	ggregory