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From "Timothy Bish (JIRA)" <>
Subject [jira] [Resolved] (AMQ-3909) Messages sometimes not received by active topic subscriptions
Date Mon, 02 Jul 2012 19:39:35 GMT


Timothy Bish resolved AMQ-3909.

    Resolution: Fixed

Fixed and tests added in trunk
> Messages sometimes not received by active topic subscriptions
> -------------------------------------------------------------
>                 Key: AMQ-3909
>                 URL:
>             Project: ActiveMQ
>          Issue Type: Bug
>          Components: Broker, JMS client, stomp
>    Affects Versions: 5.6.0
>            Reporter: Timothy Bish
>            Assignee: Timothy Bish
>             Fix For: 5.7.0
> A consumer subscribe over stomp or a failover of a consumer can lead to a scenario in
which messages are not delivered to consumers on Topics.  There is a small window in which
the consumer subscribe and consumer update of prefetch during failover and a Stomp consumer
subscribe when messages might be produced but the subscription is not sent those messages.
 Once a new Message is produced after the ConsumerControl command updates the prefetch then
pending messages are dispatched.  The Topic and DurableTopic subscription classes need to
do an eager dispatch after the prefetch size is updated to ensure pending message that were
held because the window was to small are dispatched in a timely manner.

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