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https://issues.apache.org/jira/browse/LOG4J2-2052?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16169415#comment-16169415
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Dan Berindei commented on LOG4J2-2052:
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Sure, I'm fine with changing it only on 8u102+.
> Disable thread name caching by default
> --------------------------------------
>
> Key: LOG4J2-2052
> URL: https://issues.apache.org/jira/browse/LOG4J2-2052
> Project: Log4j 2
> Issue Type: Improvement
> Reporter: Dan Berindei
> Priority: Minor
>
> We run our tests in parallel with TestNG and we use {{Thread.setName()}} for
> easy filtering of log messages from a single test. But since LOG4J2-1334, all
> the thread names are logged as {{TestNG}}, unless we use
> {{-DAsyncLogger.ThreadNameStrategy=UNCACHED}}.
> JDK 8u102 removed the {{String}} allocation in {{Thread.getName()}}
> (https://bugs.openjdk.java.net/browse/JDK-8148842), so I suggest changing the
> default strategy to {{UNCACHED}}. Users of older JDKs will still be able to
> use {{-DAsyncLogger.ThreadNameStrategy=CACHED}} for the performance
> improvement.
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