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| Apache Log4j 2.4.1 RELEASE NOTES |
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| The Apache Log4j 2 team is pleased to announce the Log4j 2.4.1 release! |
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| 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, property substitution using Lookups, and asynchronous |
| Loggers. In addition, Log4j 2 will not lose events while reconfiguring. |
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| This is the ninth GA release. It contains several bugfixes and new features. |
| Log4j 2 requires a minimum of Java 7. |
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| GA Release 2.4.1 |
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| Changes in this version include: |
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| New features: |
| o LOG4J2-1129: Allow PatternLayout to select a pattern to use based on some selection criteria. |
| o LOG4J2-1145: Add %equals to PatternLayout to test and replace patterns with strings. |
| o LOG4J2-1147: Add %equalsIgnoreCase to PatternLayout to test and replace patterns with strings. |
| o LOG4J2-1146: Add %notEmpty to PatternLayout to avoid output of patterns where all variables are empty. |
| o LOG4J2-1020: Add possibility to set shutdown timeout on AsyncAppender. |
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| Fixed Bugs: |
| o LOG4J2-1153: Fixed NullPointerException when only root logger is defined (and no named loggers) in configuration properties file. |
| o LOG4J2-1140: Fixed bug where headers were not being written to first file with RollingFileAppender. |
| o LOG4J2-1149: Fixed bug where PatternLayout predefined date pattern with time zone always renders default date format. |
| o LOG4J2-1050: Fixed Log4jLookup. |
| o LOG4J2-1142: Fix potential memory leak in web applications by using a straight ThreadLocal field instead of subclassing ThreadLocal. |
| o LOG4J2-1135: Compression on rollover was broken: log file was renamed to .zip but not compressed. |
| o LOG4J2-1127: log4j2.xml cannot be parsed on Oracle Weblogic 12c. |
| o LOG4J2-1132: Do not use MongoDB driver 2.13.3 deprecated methods. |
| o LOG4J2-1144: Add %markerSimpleName in pattern layout should evaluate to marker name (not toString()). |
| o LOG4J2-1126: Web site corrections and updates. |
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| Changes: |
| o LOG4J2-1151: Performance improvement: backport Java 8 fast ISO-8859-1 String to byte[] encoder to AbstractStringLayout. |
| o LOG4J2-935: Performance improvement when converting Strings to byte[] arrays. |
| o LOG4J2-1040: Update MongoDB driver from 2.13.3 to 3.0.4. |
| o LOG4J2-1128: Reuse StringBuilder to improve performance for String-based layouts: CSV, GELF, HTML, RFC524, Syslog. |
| o LOG4J2-1131: Update mongo-java-driver from 2.13.2 to 2.13.3. |
| o LOG4J2-1138: Do not use Jackson deprecated methods. |
| o LOG4J2-1139: Update Jackson from 2.6.1 to 2.6.2. |
| o LOG4J2-1150: Update kafka-clients from 0.8.2.1 to 0.8.2.2. |
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| Apache Log4j 2.4.1 requires a minimum of Java 7 to build and run. Log4j 2.4 and greater requires Java 7, |
| version 2.3 required Java 6. |
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| Basic compatibility with Log4j 1.x is provided through the log4j-1.2-api component, however it does not implement some of the |
| very implementation specific classes and methods. The package names and Maven groupId have been changed to |
| org.apache.logging.log4j to avoid any conflicts with log4j 1.x. |
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| 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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| http://logging.apache.org/log4j/2.x/ |