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https://issues.apache.org/jira/browse/AMQ-5966?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14902859#comment-14902859
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Christian Schneider commented on AMQ-5966:
------------------------------------------

I can not reproduce a hang from the Test class. 
This looks a bit weird though:
                public void onMessage(Message message) {
                        if (rolledBack) {
                            throw new RuntimeException("Session rolled back.");
                        }
Why does the code assume a session that experienced a rollback can not receive 
any more messages?


> ActiveMQ client hangs after rollback of a transacted JMS session
> ----------------------------------------------------------------
>
>                 Key: AMQ-5966
>                 URL: https://issues.apache.org/jira/browse/AMQ-5966
>             Project: ActiveMQ
>          Issue Type: Bug
>          Components: JMS client
>    Affects Versions: 5.12.0
>         Environment: Reproduced standalone under Linux, but any environment 
> should be affected.
>            Reporter: Andreas Mattes
>         Attachments: AMQRollbackTest.java
>
>
> The ActiveMQ JMS client is accessed through the ConnectionConsumer protocol. 
> A ServerSessionPool is provided which creates ServerSessions with transacted 
> JMS sessions. Up to ActiveMQ 5.11.2, everything has worked fine, but with 
> ActiveMQ 5.12.0, after rollback of a sesseion, the application hangs until 
> JMS re-connect happens. Further investigation reveals that with ActiveMQ 
> 5.11.2 and earlier, after rollback a new ServerSession is taken from the pool 
> and loaded with the message of the rolled back session. With ActiveMQ 5.12.0, 
> however, the MessageListener of the same session is called again. This is a 
> problem with the ConnectionConsumer protocol, because the may have claimed 
> the session for recycling.
> The attached piece of test code (AMQRollbackTest.java) demonstrates the 
> issue. It runs fine with ActiveMQ 5.11.2 and hangs with ActiveMQ 5.12.0. It 
> demonstrates the issue for QueueSessions, but TopicSessions are affected 
> equally.



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