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https://issues.apache.org/jira/browse/LOG4J2-1385?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15316072#comment-15316072
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Remko Popma commented on LOG4J2-1385:
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Actually, perhaps we should create an internal utility that works like Unbox
but is intended for Log4j internal use. Unbox is meant for parameters to a log
call and has a ringbuffer of StringBuilders. After 16 calls to {{box}} it
reuses the first StringBuilder again, so there is a limit to how many things
can be boxed before the call to Message.getFormattedMessage() breaks.
> (GC) CSV layouts should not create a new CSVPrinter for each log event
> ----------------------------------------------------------------------
>
> Key: LOG4J2-1385
> URL: https://issues.apache.org/jira/browse/LOG4J2-1385
> Project: Log4j 2
> Issue Type: Improvement
> Components: Layouts
> Affects Versions: 2.5
> Reporter: Gary Gregory
> Assignee: Gary Gregory
> Fix For: 2.6.1
>
> Attachments: logging-log4j2.patch
>
>
> CSV layouts should not create a new CSVPrinter for each log event. This will
> likely require a new version of Apache Commons CVS, see [CSV-182].
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