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https://issues.apache.org/jira/browse/LOG4J2-3622?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17738134#comment-17738134
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Volkan Yazici commented on LOG4J2-3622:
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For the records, {{Thread.Builder.OfVirtual#allowSetThreadLocals(boolean)}},
which used to exist up until [JDK
20|https://docs.oracle.com/en/java/javase/20/docs/api/java.base/java/lang/Thread.Builder.OfVirtual.html#allowSetThreadLocals(boolean)],
is removed in [JDK
21|https://download.java.net/java/early_access/jdk21/docs/api/java.base/java/lang/Thread.Builder.OfVirtual.html].
Hence, I take the liberty to close this ticket and suggest users to refer to
the following tickets for more specialized JEP 425 & 429 issues:
* [#1401|https://github.com/apache/logging-log4j2/pull/1401] for the recycler
API
* [#1532|https://github.com/apache/logging-log4j2/issues/1532] for replacing
{{synchronized}} blocks with locks
> Support for virtual threads
> ---------------------------
>
> Key: LOG4J2-3622
> URL: https://issues.apache.org/jira/browse/LOG4J2-3622
> Project: Log4j 2
> Issue Type: Bug
> Components: Core
> Reporter: liuxichen
> Priority: Critical
>
> I noticed in ReusableMessageFactory threadlocal are used, so If a am using
> jdk19 virtual threads while logging with threadlocal disabled,
> UnsupportedOperationException would be thrown, and using log in a lot of
> virtual threads might create a lot of useless objects, could you please fix
> this?
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