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https://issues.apache.org/jira/browse/AMQ-3451?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13427872#comment-13427872
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Sergey commented on AMQ-3451:
-----------------------------
The problem is in org.apache.activemq.thread.TaskRunnerFactory#executor. The
thread pool's keepAliveTime is 30 seconds. If you have a single web application
in Tomcat which uses JMS, and
you re-start (or re-deploy) your web application in an interval less that 30
seconds, then the thread is not terminated and re-used, the thread references
the undeployed web applicaiton classloader and JVM cannot collect undeployed
application and free PermGen memory area.
> Tomcat 6.0.32 complains that ActiveMQ 5.5 doesn't shutdown a thread
> -------------------------------------------------------------------
>
> Key: AMQ-3451
> URL: https://issues.apache.org/jira/browse/AMQ-3451
> Project: ActiveMQ
> Issue Type: Bug
> Components: JMS client
> Affects Versions: 5.5.0
> Environment: jdk 1.6.0_23 for Linux 64 bit, Ubuntu 11.04
> Tomcat 6.0.32
> Spring 3.0.5
> Reporter: John Miller
> Labels: leak, resource
> Attachments: transport_thread_leak.png
>
>
> Every time when restarting web application in Tomcat Manager I get messages:
> SEVERE: The web application [/sms] appears to have started a thread named
> [ActiveMQ Task-3] but has failed to stop it. This is very likely to create a
> memory leak.
> With every restart PermGen space is increased and finally i got OutOfMemory
> error for PermGen space.
> I use Spring DefaultMessageListenerContainer, and it's shutdown method closes
> properly receivers threads. What is "ActiveMQ Task-3" thread and how to close
> it properly ?
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