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Posted to dev@activemq.apache.org by "Rob Davies (JIRA)" <ji...@apache.org> on 2008/01/21 09:49:21 UTC

[jira] Created: (AMQ-1556) Concurrency Issue on MessageConsumer deliveredMessages

Concurrency Issue on MessageConsumer deliveredMessages
------------------------------------------------------

                 Key: AMQ-1556
                 URL: https://issues.apache.org/activemq/browse/AMQ-1556
             Project: ActiveMQ
          Issue Type: Bug
    Affects Versions: 5.0.0
            Reporter: Rob Davies
            Assignee: Rob Davies
             Fix For: 5.1.0


The LinkedList can be modified concurrently - see http://www.nabble.com/NPE-while-consuming-messages-to12301153s2354.html

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[jira] Resolved: (AMQ-1556) Concurrency Issue on MessageConsumer deliveredMessages

Posted by "Rob Davies (JIRA)" <ji...@apache.org>.
     [ https://issues.apache.org/activemq/browse/AMQ-1556?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Rob Davies resolved AMQ-1556.
-----------------------------

    Resolution: Fixed

Fixed by svn revision 613829

> Concurrency Issue on MessageConsumer deliveredMessages
> ------------------------------------------------------
>
>                 Key: AMQ-1556
>                 URL: https://issues.apache.org/activemq/browse/AMQ-1556
>             Project: ActiveMQ
>          Issue Type: Bug
>    Affects Versions: 5.0.0
>            Reporter: Rob Davies
>            Assignee: Rob Davies
>             Fix For: 5.1.0
>
>
> The LinkedList can be modified concurrently - see http://www.nabble.com/NPE-while-consuming-messages-to12301153s2354.html

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[jira] Commented: (AMQ-1556) Concurrency Issue on MessageConsumer deliveredMessages

Posted by "Matthew Roy (JIRA)" <ji...@apache.org>.
    [ https://issues.apache.org/activemq/browse/AMQ-1556?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=41689#action_41689 ] 

Matthew Roy commented on AMQ-1556:
----------------------------------

I still see frequent concurrency issues within this class's dispose method when it clears the linked list.

java.lang.NullPointerException
	at java.util.LinkedList.clear(LinkedList.java:294)
	at org.apache.activemq.ActiveMQMessageConsumer.dispose(ActiveMQMessageConsumer.java:661)
	at org.apache.activemq.ActiveMQMessageConsumer.close(ActiveMQMessageConsumer.java:578)
        ...

> Concurrency Issue on MessageConsumer deliveredMessages
> ------------------------------------------------------
>
>                 Key: AMQ-1556
>                 URL: https://issues.apache.org/activemq/browse/AMQ-1556
>             Project: ActiveMQ
>          Issue Type: Bug
>    Affects Versions: 5.0.0
>            Reporter: Rob Davies
>            Assignee: Rob Davies
>             Fix For: 5.1.0
>
>
> The LinkedList can be modified concurrently - see http://www.nabble.com/NPE-while-consuming-messages-to12301153s2354.html

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