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https://issues.apache.org/jira/browse/LOG4J2-314?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13716215#comment-13716215
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Remko Popma commented on LOG4J2-314:
------------------------------------
It is possible to have multiple AsyncAppenders. Be careful though, in the
example above, RoutingAppender has an appender-ref that points to SUMMARY_ALL,
so you should *not* have a separate AsyncAppender that also refers to this
SUMMARY_ALL.
Another drawback is that every AsyncAppender will start its own thread, but
this is probably not a huge problem.
An alternative would be to use AsyncLoggers
(http://logging.apache.org/log4j/2.0/manual/async.html). Just remove all
AsyncAppenders from the config, and set system property
{{-DLog4jContextSelector=org.apache.logging.log4j.core.async.AsyncLoggerContextSelector}}.
This makes the configuration simpler, uses only one thread, and is probably
faster too.
> Multiple thread creation problem with AsyncAppender
> ---------------------------------------------------
>
> Key: LOG4J2-314
> URL: https://issues.apache.org/jira/browse/LOG4J2-314
> Project: Log4j 2
> Issue Type: Question
> Components: Appenders, Configurators
> Reporter: Sudharma Puranik
> Attachments: asyncAppendThread.png, log4j2.xml, loggerThread.png,
> TestAppender.zip
>
>
> I have a log4j2.xml configuration file from which I am getting the Logger,
> attached is the snapshot. when my logger is created a new thread is created.
> Programmatically,I create a RollingFileAppender and attach the it to
> AsyncAppender . I attach the Async Appender to the configuration of the
> log4j.xml, And when I start the Async Appender again a new thread is created.
> Is this a bug? because I get a logger a new thread is generated and when I
> create a async appender another thread is created and both are doing the same
> job.
> Also there is already a asyncappender in my log4j2.xml and I am creating one
> via program. Will this cause a problem? I did this because I am currently
> unable to hook my programmatically created appender to the AsyncAppender
> defined in log4j2.xml.
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