[jboss-jira] [JBoss JIRA] Commented: (JBMESSAGING-926) Negative message count

Tue Apr 24 05:41:30 EDT 2007

    [ http://jira.jboss.com/jira/browse/JBMESSAGING-926?page=comments#action_12360330 ] 

Sergey Koshcheyev commented on JBMESSAGING-926:
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I now have a test case reproducing this bug, but I have no idea how to fix it.

The problem is apparently that if removeAllMessages is called while a session is in progress, the message count is set to 0 but messages buffered in MessageCallbackHandler are not cleared and can be received later in the session, so you can in fact receive a message after all messages have been removed. Receiving such a message causes the queue message count to go negative.

So, would the solution be to flush the MessageCallbackHandler buffer when removeAllMessages called? Is this at all possible? From the code it looks like the queue would have to message all its consumers when all messages are removed so that the consumers clear their buffers. Is there some other alternative?

> Negative message count
> ----------------------
>
>                 Key: JBMESSAGING-926
>                 URL: http://jira.jboss.com/jira/browse/JBMESSAGING-926
>             Project: JBoss Messaging
>          Issue Type: Bug
>    Affects Versions: 1.2.0.GA
>         Environment: any
>            Reporter: Kurt Stam
>         Assigned To: Sergey Koshcheyev
>             Fix For: 1.2.0.SP2
>
>         Attachments: screenshot-1.jpg
>
>
> When I removeAllMessages from the Queue while the thing is working on the queue, I can get a negative message count (see screenshot) I thought this was a funny bug :).

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