Apache Logging Services

Saturday March 17, 2018

Log4j 2.11 released

The Apache Log4j 2 team is pleased to announce the Log4j 2.11 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.

This release contains new features, bugfixes and minor enhancements. One 2.11 feature worth highlighting is that log timestamps can now have microsecond or nanosecond precision when running on Java 9.

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.

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