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From "Gary Gregory (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (LOG4J2-505) Memory leak with org.apache.logging.log4j.core.async.AsyncLoggerConfigHelper$Log4jEventWrapper
Date Sat, 18 Jan 2014 13:35:19 GMT

    [ https://issues.apache.org/jira/browse/LOG4J2-505?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13875661#comment-13875661
] 

Gary Gregory commented on LOG4J2-505:
-------------------------------------

Should this be better documented? In the FAQ?

> 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
>            Assignee: Remko Popma
>             Fix For: 2.0-beta9
>
>
> 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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