Matej Vitásek created LOG4J2-280:
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             Summary: AsynchAppender's AsynchThread blocks Tomcat shutdown
                 Key: LOG4J2-280
                 URL: https://issues.apache.org/jira/browse/LOG4J2-280
             Project: Log4j 2
          Issue Type: Bug
         Environment: Log4j 2.0 beta 4, Tomcat 6, Java 6 @ Mac OS X
            Reporter: Matej Vitásek


Since I added an AsynchAppender to my configuration (to send mails with errors 
asynchronously), my Tomcat refuses to shut down nicely. It always freezes on a 
line like this:
...
Jun 11, 2013 6:57:04 PM org.apache.coyote.http11.Http11Protocol destroy
INFO: Stopping Coyote HTTP/1.1 on http-8080
Jun 11, 2013 6:57:04 PM org.apache.coyote.http11.Http11Protocol destroy
INFO: Stopping Coyote HTTP/1.1 on http-8443

At this point, there is a non-daemon thread called "Thread-2" that, if I kill, 
Tomcat stops nicely.

I have traced this issue to the AsynchThread in AsynchAppender, and if I stop 
using it in my configuration, Tomcat stops nicely again.

Could you tell me what additional information I may provide to help track down 
this issue?

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