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From "Sergey (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (AMQ-3451) Tomcat 6.0.32 complains that ActiveMQ 5.5 doesn't shutdown a thread
Date Thu, 02 Aug 2012 21:17:03 GMT

    [ https://issues.apache.org/jira/browse/AMQ-3451?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13427617#comment-13427617
] 

Sergey commented on AMQ-3451:
-----------------------------

The problem is that when you put ActiveMQ libraries into Tomcat shared "lib" folder, then
ActiveMQ  thread pool becomes shared between all web applications. When a web application
sends a message, then a transport thread is created by a web application, then the thread
is returned to the pool. Then the web application is undeployed,  the thread remains alive
in the pool and can be re-used by another applicaiton. In results into a memory leak, because
the thread is still alive after undeployment of web application and references the web application
context classloader.
                
> 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
>
> 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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