[ANNOUNCEMENT] Log4j 2.13.0 released!

The Apache Log4j 2 team is pleased to announce the Log4j 2.13.0 release!

Apache Log4j is a well known framework for logging application behavior. =
Log4j 2 is an upgrade to Log4j that provides significant improvements =
over its predecessor, Log4j 1.x, and provides many other modern features =
such as support for Markers, lambda expressions for lazy logging, =
property substitution using Lookups, multiple patterns on a =
PatternLayout and asynchronous Loggers. Another notable Log4j 2 feature =
is the ability to be "garbage-free" (avoid allocating temporary objects) =
while logging. In addition, Log4j 2 will not lose events while =
reconfiguring.

The artifacts may be downloaded from =
https://logging.apache.org/log4j/2.x/download.html.

This release contains bugfixes and minor enhancements. Some of the new =
features in this release are:

	=E2=80=A2 Log4j 2 now requires Java 8 or higher to build and =
run.
	=E2=80=A2 Experimental support for Log4j 1 configuration files. =
See Log4j 2 Compatiblity with Log4j 1.
	=E2=80=A2 The Logger API has been enhanced to support a builder =
pattern. This can dramatically improve the overhead of capturing =
location information. See Log Builder.
	=E2=80=A2 Better integration with Spring Boot by providing =
access to Spring variables in Log4j 2 configuration files and allowing =
Log4j 2 system properties to be defined in the Spring configuration. See =
Logging in the Cloud.
	=E2=80=A2 Support for accessing Kubernetes information via a =
Log4j 2 Lookup.
	=E2=80=A2 The Gelf Layout now allows the message to be formatted =
using a PatternLayout pattern. Logging in the Cloud provides an example =
of this, as well as the use of the Spring and Kubernetes Lookups.
Due to a break in compatibility in the SLF4J binding, Log4j now ships =
with two versions of the SLF4J to Log4j adapters. log4j-slf4j-impl =
should be used with SLF4J 1.7.x and earlier and log4j-slf4j18-impl =
should be used with SLF4J 1.8.x and later.

Note that the XML, JSON and YAML formats changed in the 2.11.0 release: =
they no longer have the "timeMillis" attribute and instead have an =
"Instant" element with "epochSecond" and "nanoOfSecond" attributes.

The Log4j 2.13.0 API, as well as many core components, maintains binary =
compatibility with previous releases.

GA Release 2.13.0

Changes in this version include:

New Features

	=E2=80=A2 LOG4J2-2732: Add ThreadContext.putIfNotNull method. =
Thanks to Matt Pavlovich.
	=E2=80=A2 LOG4J2-2731: Add a Level Patttern Selector.
	=E2=80=A2 LOG4J2-63: Add experimental support for Log4j 1 =
configuration files.
	=E2=80=A2 LOG4J2-2716: 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.
	=E2=80=A2 LOG4J2-2710: Allow Spring Boot application properties =
to be accessed in the Log4j 2 configuration. Add lower and upper case =
Lookups.
	=E2=80=A2 LOG4J2-2639: Add builder pattern to Logger interface.
Fixed Bugs

	=E2=80=A2 LOG4J2-2058: Prevent recursive calls to =
java.util.LogManager.getLogger().
	=E2=80=A2 LOG4J2-2725: LOG4J2-2725 - Added try/finally around =
event.execute() for RingBufferLogEventHandler to clear memory correctly =
in case of exception/error Thanks to Dzmitry Anikechanka.
	=E2=80=A2 LOG4J2-2635: Wrong java version check in =
ThreadNameCachingStrategy. Thanks to Filipp Gunbin.
	=E2=80=A2 LOG4J2-2674: Use a less confusing name for the =
CompositeConfiguration source. Thanks to Anton Korenkov.
	=E2=80=A2 LOG4J2-2727: Add setKey method to Kafka Appender =
Builder. Thanks to Cl=C3=A9ment Mathieu.
	=E2=80=A2 LOG4J2-2707: ArrayIndexOutOfBoundsException could =
occur with MAC address longer than 6 bytes. Thanks to Christian Frank.
	=E2=80=A2 LOG4J2-2712: The rolling file appenders would fail to =
compress the file after rollover if the file name matched the file =
pattern.
	=E2=80=A2 LOG4J2-2693: @PluginValue does not support attribute =
names besides "value".
	=E2=80=A2 LOG4J2-2647: Validation blocks definition of script in =
properties configuration.
	=E2=80=A2 LOG4J2-2680: Set result of rename action to true if =
file was copied. Thanks to Guillermo Xavier Hurtado Garcia.
	=E2=80=A2 LOG4J-2672: Add automatic module names where missing. =
Thanks to Stephen Colebourne.
	=E2=80=A2 LOG4J2-2673: OutputStreamAppender.Builder ignores =
setFilter(). Thanks to Yuichi Sugimura.
	=E2=80=A2 LOG4J2-2725: Prevent a memory leak when async loggers =
throw errors. Thanks to Dzmitry Anikechanka.
Changes

	=E2=80=A2 LOG4J2-2701: Update Jackson to 2.9.10.
	=E2=80=A2 LOG4J2-2709: Allow message portion of GELF layout to =
be formatted using a PatternLayout. Allow ThreadContext attributes to be =
explicitly included or excluded in the GelfLayout.
Apache Log4j 2.13.0 requires a minimum of Java 8 to build and run. Log4j =
2.3 was the last release that supported Java 6 and Log4j 2.11.2 is the =
last release to support Java 7.

For complete information on Apache Log4j 2, including instructions on =
how to submit bug reports, patches, or suggestions for improvement, see =
the Apache Apache Log4j 2 website:

https://logging.apache.org/log4j/2.x/=