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| # Apache Log4j 2.19.0 Release Notes |
| |
| The Apache Log4j 2 team is pleased to announce the Log4j 2.19.0 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 primarily contains bug fixes and minor enhancements. |
| |
| 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-slf4j2-impl should be used with SLF4J 2.x and |
| later. SLF4J-1.8.x is no longer supported as a GA release never occurred. |
| |
| The Log4j 2.19.0 API, as well as many core components, maintains binary compatibility with previous releases. |
| |
| ## GA Release 2.19.0 |
| |
| Changes in this version include: |
| |
| ### New Features |
| * [LOG4J2-3583](https://issues.apache.org/jira/browse/LOG4J2-3583): |
| Add support for SLF4J2 stack-valued MDC. Thanks to Pierrick Terrettaz. |
| * [LOG4J2-2975](https://issues.apache.org/jira/browse/LOG4J2-2975): |
| Add implementation of SLF4J2 fluent API. Thanks to Daniel Gray. |
| |
| ### Fixed Bugs |
| * [LOG4J2-3578](https://issues.apache.org/jira/browse/LOG4J2-3578): |
| Generate new SSL certs for testing. |
| * [LOG4J2-3556](https://issues.apache.org/jira/browse/LOG4J2-3556): |
| Make JsonTemplateLayout stack trace truncation operate for each label block. Thanks to Arthur Gavlyukovskiy. |
| * [LOG4J2-3550](https://issues.apache.org/jira/browse/LOG4J2-3550): |
| SystemPropertyArbiter was assigning the value as the name. Thanks to DongjianPeng. |
| * [LOG4J2-3560](https://issues.apache.org/jira/browse/LOG4J2-3560): |
| Logger$PrivateConfig.filter(Level, Marker, String) was allocating empty varargs array. Thanks to David Schlosnagle. |
| * [LOG4J2-3561](https://issues.apache.org/jira/browse/LOG4J2-3561): |
| Allows a space separated list of style specifiers in the %style pattern for consistency with %highlight. Thanks to Robert Papp. |
| * [LOG4J2-3564](https://issues.apache.org/jira/browse/LOG4J2-3564): |
| Fix NPE in `log4j-to-jul` in the case the root logger level is null. |
| * [LOG4J2-3545](https://issues.apache.org/jira/browse/LOG4J2-3545): |
| Add correct manifest entries for OSGi to log4j-jcl Thanks to Johan Compagner. |
| * [LOG4J2-3565](https://issues.apache.org/jira/browse/LOG4J2-3565): |
| Fix RollingRandomAccessFileAppender with DirectWriteRolloverStrategy can't create the first log file of different directory. |
| * [LOG4J2-3579](https://issues.apache.org/jira/browse/LOG4J2-3579): |
| Fix ServiceLoaderUtil behavior in the presence of a SecurityManager. Thanks to Boris Unckel. |
| * [LOG4J2-3559](https://issues.apache.org/jira/browse/LOG4J2-3559): |
| Fix resolution of properties not starting with `log4j2.`. Thanks to Gary Gregory. |
| * [LOG4J2-3557](https://issues.apache.org/jira/browse/LOG4J2-3557): |
| Fix recursion between Log4j 1.2 LogManager and Category. Thanks to Andreas Leitgeb. |
| * [LOG4J2-3587](https://issues.apache.org/jira/browse/LOG4J2-3587): |
| Fix regression in Rfc5424Layout default values. Thanks to Tomas Micko. |
| * [LOG4J2-3548](https://issues.apache.org/jira/browse/LOG4J2-3548): |
| Improve support for passwordless keystores. Thanks to Kristof Farkas-Pall. |
| * [LOG4J2-708](https://issues.apache.org/jira/browse/LOG4J2-708): |
| Add async support to `Log4jServletFilter`. |
| |
| ### Changes |
| * [LOG4J2-3572](https://issues.apache.org/jira/browse/LOG4J2-3572): |
| Add getExplicitLevel method to LoggerConfig. |
| * [LOG4J2-3589](https://issues.apache.org/jira/browse/LOG4J2-3589): |
| Allow Plugins to be injected with the LoggerContext reference. |
| * [LOG4J2-3588](https://issues.apache.org/jira/browse/LOG4J2-3588): |
| Allow PropertySources to be added. |
| |
| ### Removed |
| * [LOG4J2-3573](https://issues.apache.org/jira/browse/LOG4J2-3573): |
| Removed build page in favor of a single build instructions file. Thanks to Wolff Bock von Wuelfingen. |
| * [LOG4J2-3590](https://issues.apache.org/jira/browse/LOG4J2-3590): |
| Remove SLF4J 1.8.x binding. |
| --- |
| |
| Apache Log4j 2.19.0 requires a minimum of Java 8 to build and run. |
| Log4j 2.12.4 is the last release to support Java 7. |
| Log4j 2.3.2 is the last release to support Java 6. |
| Java 6 and Java 7 are no longer supported by the Log4j team. |
| |
| 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/ |
| |
| --- |
| |
| Earlier release notes are accessible in [Release History](https://logging.apache.org/log4j/2.x/changes-report.html). |
