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https://issues.apache.org/jira/browse/LOG4J2-3172?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Volkan Yazici resolved LOG4J2-3172.
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Resolution: Fixed
> SmtpManager sends emails with OFF level messages
> ------------------------------------------------
>
> Key: LOG4J2-3172
> URL: https://issues.apache.org/jira/browse/LOG4J2-3172
> Project: Log4j 2
> Issue Type: Bug
> Components: Appenders
> Affects Versions: 2.14.1
> Reporter: Barry Fleming
> Assignee: Volkan Yazici
> Priority: Major
> Fix For: 2.15.0
>
>
> I occasionally receive emails with logs that have OFF level and no message
> when using <SMTP> with a filter and the setting
> -Dlog4j2.contextSelector=org.apache.logging.log4j.core.async.AsyncLoggerContextSelector.
> I believe the cause is that AsyncLoggerContextSelector uses
> RingBufferLogEvents, and when the filter matches these events are buffered by
> the SmtpManager and then cleared soon after by the RingBufferLogEventHandler.
> Once the SmtpManager's buffer has filled, the empty events are added to the
> email.
> There is logic in SmtpManager.add(LogEvent) to copy the contents of mutable
> messages, and it might be appropriate to do the same for RingBufferLogEvents.
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