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From "Sebastian Riedel (JIRA)" <>
Subject [jira] Created: (AMQ-1920) MessageAvailableListener doesn't work with prefetchSize set to zero
Date Fri, 29 Aug 2008 12:12:52 GMT
MessageAvailableListener doesn't work with prefetchSize set to zero

                 Key: AMQ-1920
             Project: ActiveMQ
          Issue Type: Bug
    Affects Versions: 5.1.0, 4.1.1
         Environment: Broker running ActiveMQ 4.1.1
Client/Consumer tested with AMQ 4.1.1 and 5.1.0
            Reporter: Sebastian Riedel
            Priority: Critical
             Fix For: 5.1.0, 4.1.1

The MessageAvailableListener doesn't trigger his event, when prefetchSize is set to zero,
although messages are in queue (but because of prefetchSize = zero not dispatched). I understand
why the complete asynchronous MessageListener is not allowed to be used with prefetchSize
of zero, but in my opinion the AvailableListener should work.

Since there is no other possibilty to check for the availability of a new message ( the Queuebrowser
is for this aim to slow, because it produces massive traffic) this is a critical issue in
my case, also because i can't use JMX to determine e.g. the  QueueSize to trigger a MessageAvailableEvent

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