[jira] [Created] (LOG4J2-505) Memory leak with org.apache.logging.log4j.core.async.AsyncLoggerConfigHelper$Log4jEventWrapper

["Tal Liron (JIRA)" <ji...@apache.org>]

Tal Liron created LOG4J2-505:
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             Summary: Memory leak with org.apache.logging.log4j.core.async.AsyncLoggerConfigHelper$Log4jEventWrapper
                 Key: LOG4J2-505
                 URL: https://issues.apache.org/jira/browse/LOG4J2-505
             Project: Log4j 2
          Issue Type: Bug
          Components: Core
    Affects Versions: 2.0-beta9
            Reporter: Tal Liron


Instances of this class seem to be created but never garbage collected. Here is a jmap dump of the problem:

https://dl.dropboxusercontent.com/u/122806/jvm8_gc2.zip

Use jhat to analyze it: if you go to the instance count, you will see that the aforementioned class is way out of control.

Some background on how I discovered this, which may help: I am currently working with the Oracle OpenJDK team to debug a memory leak that has existed with JSR-292 (invokedynamic) that has been present since 7u40, and also plagues OpenJDK 8 right now. The bug is prevalent in the Nashorn engine, which is being shipped with JDK 8. Indeed, in the memory dump above, you'll see that JSR-292 and Nashorn classes are also out of control -- but still second to the log4j class!



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