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https://issues.apache.org/jira/browse/LOG4J2-2433?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16713026#comment-16713026
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Raman Gupta commented on LOG4J2-2433:
-------------------------------------
Fixed in https://github.com/apache/logging-log4j-kotlin/pull/7
> Support MDCs with Kotlin coroutines
> -----------------------------------
>
> Key: LOG4J2-2433
> URL: https://issues.apache.org/jira/browse/LOG4J2-2433
> Project: Log4j 2
> Issue Type: New Feature
> Components: Kotlin API
> Affects Versions: Kotlin 1.0.0
> Reporter: Raman Gupta
> Priority: Major
>
> Create support for log4j2 MDC when used with Kotlin coroutines. Since
> coroutines do not guarantee which underlying thread is executing code after a
> continuation, a standard ThreadLocal is not sufficient to keep the MDC
> context.
> Kotlin coroutines have a mechanism by which "coroutine local" data can be
> stored. See the reference implementation for SLF4J here:
> https://github.com/Kotlin/kotlinx.coroutines/tree/master/integration/kotlinx-coroutines-slf4j
> We should implement an optional native module to add support for log4j2 MDC
> using the same pattern, that does not require having SLF4J and the
> slf4j-log4j2 implementation on the classpath.
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