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From "Gary Tully (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (AMQ-4224) Setting queue policy queuePrefetch=0 in broker configuration causes messages to stay in pending state in broker - the messages aren't consumed
Date Mon, 17 Dec 2012 13:48:12 GMT

     [ https://issues.apache.org/jira/browse/AMQ-4224?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Gary Tully resolved AMQ-4224.
-----------------------------

    Resolution: Fixed

consumer now gets notification of real effective prefetch so it can do a pull when appropriate
                
> Setting queue policy queuePrefetch=0 in broker configuration causes messages to stay
in pending state in broker - the messages aren't consumed
> ----------------------------------------------------------------------------------------------------------------------------------------------
>
>                 Key: AMQ-4224
>                 URL: https://issues.apache.org/jira/browse/AMQ-4224
>             Project: ActiveMQ
>          Issue Type: Bug
>          Components: Broker, JMS client
>    Affects Versions: 5.7.0
>            Reporter: Gary Tully
>            Assignee: Gary Tully
>            Priority: Minor
>              Labels: configuration, jms, prefetch, prefetch_size, pull
>             Fix For: 5.8.0
>
>
> Broker prefetch config {code}<policyEntry queue="XX" ... queuePrefetch="0">{code}
takes effect if the consumerInfo contains the default  value (1000), indicating that it does
not have a preference.
> However in the case that the broker chooses 0, to make all consumers pull messages, this
information needs to be propagated back to the consumer to allow the receive(..) call to initiate
a pull. Currently it is conditional on the consumer prefetch value == 0 which is currently
not updated.
> The fix is to have the broker send a connection control message to update the prefetch
when broker config uses 0, and have the receive(..) call check the current prefetch value.

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