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From Ralph Goers <ralph.go...@dslextreme.com>
Subject [ANNOUNCEMENT] Apache Log4j 2.14.0 released
Date Wed, 11 Nov 2020 05:32:05 GMT
The Apache Log4j 2 team is pleased to announce the Log4j 2.14.0 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 

The artifacts may be downloaded from 

This release contains a new Layout, JsonTemplateLayout, that is intended 
to ultimately replace JsonLayout. As its name suggests it uses a 
template to define the elements to include in the JSON. This Layout was 
contributed by the author of the log4j2-logstash-layout at GitHub, and 
who is now a member of the Log4j community.

Log4j 2.14.0 adds support for MongoDB 4 and removes support for MongoDB 2.

This release also contains a number of bug fixes which are listed below.

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.

The Log4j 2.14.0 API, as well as many core components, maintains binary 
compatibility with previous releases.

GA Release 2.14.0
Changes in this version include:

New Features
LOG4J2-2957: Add JsonTemplateLayout.
LOG4J2-2848: Create module log4j-mongodb4 to use new major version 4 
MongoDB driver.
LOG4J2-2858: More flexible configuration of the Disruptor WaitStrategy. 
Thanks to Stepan Gorban.
Fixed Bugs
LOG4J2-2925: Fix broken link in FAQ.
LOG4J2-2911: Log4j2EventListener in spring.cloud.config.client listens 
for wrong event.
LOG4J2-2919: Call ReliabilityStrategy's beforeStopAppenders() method 
before stopping AsyncAppender. Thanks to Geng Yuanzhe.
LOG4J2-2906: Fix UnsupportedOperationException when initializing the 
Log4j2CloudConfigLoggingSystem. Thanks to Stephen Joyner.
LOG4J2-2908: Move Spring Lookup and Spring PropertySource to its own module.
LOG4J2-2910: Log4j-web should now stores the servlet context as a map 
entry instead of in the single external context field.
LOG4J2-2822: Javadoc link in ThreadContext description was incorrect.
LOG4J2-2894: Fix spelling error in log message.
LOG4J2-2901: Missing configuration files should be ignored when creating 
a composite configuration.
LOG4J2-2883: When using DirectFileRolloverStrategy the file pattern was 
not being recalculated on size based rollover after a time based 
rollover had occurred.
LOG4J2-2875: Rollover was failing to create directories when using a 
LOG4J2-2859: Fixed typos where mergeFactory should be mergeStrategy. 
Thanks to Yanming Zhou.
LOG4J2-2832: Correct class name printed in error message in 
RollingFileAppender. Thanks to Benjamin Asbach.
LOG4J2-2882: Support java.util.logging filters when using that API. 
Thanks to Emmanuel Bourg.
LOG4J2-2880: Create StackWalker benchmark. Revert back to 
StackWalker.walk based on benchmark results.
LOG4J2-2867: Obtain ContextDataProviders asynchronously.
LOG4J2-2877: Determine the container id to obtain container and image 
LOG4J2-2844: Null pointer exception when no network interfaces are 
LOG4J2-2895: Fix potential deadlock in asynchronous logging by avoiding 
blocking for queue space on Log4jThreads
LOG4J2-2837: Disruptor and JUL no longer recursively start the 
AsyncLoggerDisruptor resulting in an extra disruptor background thread 
constantly waiting.
LOG4J2-2867: RingBufferLogEventTranslator uses a static 
ContextDataInjector instead of initializing a new object on each thread.
LOG4J2-2898: Avoid initializing volatile fields with default values. 
Thanks to Turbanov Andrey.
LOG4J2-2899: Fix log4j-1.2-api LogEventWrapper threadId and priority 
accessors when called multiple times.
LOG4J2-2939: Fix NPE in MDCContextMap on 'contains' and 'isEmpty' 
invocations. Thanks to Constantin Hirsch.
LOG4J2-2954: Prevent premature garbage collection of shutdown hooks in 
DefaultShutdownCallbackRegistry. Thanks to Henry Tung.
LOG4J2-2889: Add date pattern support for HTML layout. Thanks to Geng 
LOG4J2-2892: Allow GelfLayout to produce newline delimited events. 
Thanks to Jakub Lukes.
: Update MongoDB tests to require Java 8 unconditionally now that Log4j 
requires Java 8.
: Update mongodb3.version from 3.12.1 to 3.12.6.
: Update com.fasterxml.jackson.* 2.10.2 -> 2.11.0.
: Update org.apache.activemq:activemq-broker 5.15.11 -> 5.16.0.
: Update org.apache.commons:commons-compress 1.19 -> 1.20.
: Update org.apache.commons:commons-csv 1.7 -> 1.8.
: Update org.apache.commons:commons-lang3 3.9 -> 3.10.
: Update org.codehaus.groovy:* 2.5.6 -> 3.0.5.
: Update tests junit:junit 4.12 -> 4.13.
: Update tests commons-io:commons-io 2.6 -> 2.7.
: Update jackson 2.11.0 -> 2.11.2.
: Update tests hsqldb 2.5.0 -> 2.5.1.
LOG4J2-2851: Drop log4j-mongodb2 module.
Apache Log4j 2.14.0 requires a minimum of Java 8 to build and run. Log4j 
2.12.1 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:


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