[jboss-jira] [JBoss JIRA] Created: (JGRP-488) ViewHandler leaves unprocessed tasks in a queue during shutdown

Vladimir Blagojevic (JIRA) jira-events at lists.jboss.org
Wed Apr 25 09:44:30 EDT 2007


ViewHandler leaves unprocessed tasks in a queue during shutdown
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                 Key: JGRP-488
                 URL: http://jira.jboss.com/jira/browse/JGRP-488
             Project: JGroups
          Issue Type: Bug
    Affects Versions: 2.4.1 SP2, 2.4.1, 2.4, 2.3, 2.5
            Reporter: Vladimir Blagojevic
         Assigned To: Vladimir Blagojevic
             Fix For: 2.4.1 SP3, 2.5


When coordinator leaves (CoordGmsImpl#leave) it puts LEAVE request in the queue, and then it calls stop(true) on view handler. This in turn flips boolean closed of the queue to true - the same boolean that is checked in ViewHandler#run while statement.

If ViewHandler happens to be processing requests in ViewHandler#process(List requests) when LEAVE gets enqueued then ViewHandler promptly exists (due to boolean q.isClosed() in while statement) without actually processing pending LEAVE or other requests! 

We should use while(true) in ViewHandler#run and have ViewHandler die gracefully once it pops out poison pill (end marker) and throws QueueClosedException.

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