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https://issues.apache.org/jira/browse/LOG4J2-3160?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17410964#comment-17410964
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ASF subversion and git services commented on LOG4J2-3160:
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Commit 36905df3180d32af61d83d21e21b225465117648 in logging-log4j2's branch
refs/heads/release-2.x from Volkan Yazici
[ https://gitbox.apache.org/repos/asf?p=logging-log4j2.git;h=36905df ]
LOG4J2-3160 Fix documentation on how to toggle log4j2.debug system property.
> log4j2.debug system property has no effect
> ------------------------------------------
>
> Key: LOG4J2-3160
> URL: https://issues.apache.org/jira/browse/LOG4J2-3160
> Project: Log4j 2
> Issue Type: Documentation
> Components: Documentation
> Affects Versions: 2.13.3
> Reporter: Lars Bohl
> Assignee: Volkan Yazici
> Priority: Major
> Fix For: 2.15.0
>
>
> The online FAQ mentions a system property "log4j2.debug", which should print
> all internal logging to the console, if set to *any* value.
> See: [https://logging.apache.org/log4j/2.x/faq.html]
> Here's the relevant quote:
> {quote}From log4j-2.9 onward, log4j2 will print all internal logging to the
> console if system property log4j2.debug is defined (with any or no value).
> {quote}
> But in reality, the internal logging can only be enabled by setting
> "log4j2.debug" to some case-variant of "*TRUE*". Please update either the
> documentation or the code.
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