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https://issues.apache.org/jira/browse/AMQ-4504?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Gary Tully resolved AMQ-4504.
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Resolution: Fixed
fix and test in http://svn.apache.org/r1478183
> Stalled pending message dispatch to composite destination consumer
> ------------------------------------------------------------------
>
> Key: AMQ-4504
> URL: https://issues.apache.org/jira/browse/AMQ-4504
> Project: ActiveMQ
> Issue Type: Bug
> Components: Broker
> Affects Versions: 5.8.0
> Reporter: Gary Tully
> Assignee: Gary Tully
> Fix For: 5.9.0
>
>
> With a backlog of messages on N destinations that exceeds the prefetch of the
> composite consumer for N, it is possible for dispatch on one destination to
> find the subscription full with messages from the other destinations.
> If there are no pending messages for that destination it won't get an ack and
> hence won't attempt to dispatch again till there is another send. Leading to
> stalled pending messages.
> The solution is to have a subscription wakeup all destination it is
> subscribed to once its dispatch list is exhausted.
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