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https://issues.apache.org/jira/browse/LOG4J2-1116?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15186686#comment-15186686
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Remko Popma commented on LOG4J2-1116:
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Not sure. AppenderControl carefully nulls out the value when done. The
ThreadLocals in DatePatternConverter and Patternlayout are recent (gc-free epic
related) and are only used if Constants.ENABLE_THREADLOCALS is true.
I haven't looked at ScriptManager. I think it was introduced after I
investigated the memory leaks on Tomcat. There may be a memory leak issue
there, I haven't checked.
> upgrade to log4j2 causes too frequent minor gc
> ----------------------------------------------
>
> Key: LOG4J2-1116
> URL: https://issues.apache.org/jira/browse/LOG4J2-1116
> Project: Log4j 2
> Issue Type: Bug
> Components: Core
> Affects Versions: 2.3
> Environment: jdk1.6
> slf4j 1.7.9
> log4j2.3
> Reporter: Mingjiang Shi
> Priority: Critical
>
> We used slf4j+log1.2 in our spring web application. Due to the log4j1.0
> performance issue, we upgrade it to log4j2. When it goes to production, it
> experienced very frequent minor gc (once per second) even though the eden
> area is not full. For example, the eden area just occupied 10%, the minor gc
> also happens. The issue disappears when rolling back to log4j1.2.
> Can anyone show some hints on diagnose this issue? Thanks!
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