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From "Matthew Roy (JIRA)" <j...@apache.org>
Subject [jira] Commented: (AMQ-1556) Concurrency Issue on MessageConsumer deliveredMessages
Date Fri, 14 Mar 2008 19:45:32 GMT

    [ 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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