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From "Claus Ibsen (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (AMQ-3451) Tomcat 6.0.32 complains that ActiveMQ 5.5 doesn't shutdown a thread
Date Mon, 03 Sep 2012 08:57:10 GMT

    [ https://issues.apache.org/jira/browse/AMQ-3451?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13447171#comment-13447171
] 

Claus Ibsen commented on AMQ-3451:
----------------------------------

The org.apache.activemq.thread.DefaultThreadPools seems to be used in 2 areas
- by the broker a bit
- transports

The code for the broker, can be refactored to use a broker specific executor, so when the
broker shutdown, those threads will be shutdown as well. That should be doable

The transports can be used by JMS clients as well, so I wonder as Gary says, can we use a
dedicated thread pool (executor service) *per* transport?
If that would be doable, then we have start|stop callbacks on the transports, where we can
ensure the thread pool is setup / shutdown properly.
                
> 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: inherited_access_cotrol_context_leak.png, patch.txt, 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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