Barry Fleming created LOG4J2-3172:
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Summary: 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
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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