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https://issues.apache.org/jira/browse/AMQ-4665?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Gary Tully resolved AMQ-4665.
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Resolution: Fixed
fix in http://svn.apache.org/r1511307
auto ack on duplicate now replaced with poison ack with poison cause property
set. Duplicates need to be flagged as problems in the normal case.
Client ack mode now allows replay b/c consumed and undelivered are rolledback
in a failover interrupt.
> Failover with client ack mode consumer can loose a message auto acked as a
> duplicate
> ------------------------------------------------------------------------------------
>
> Key: AMQ-4665
> URL: https://issues.apache.org/jira/browse/AMQ-4665
> Project: ActiveMQ
> Issue Type: Bug
> Components: JMS client
> Affects Versions: 5.8.0
> Reporter: Gary Tully
> Assignee: Gary Tully
> Labels: clientAck, duplicate, failover
> Fix For: 5.9.0
>
>
> with a client ack consumer and failover after receipt but before message.ack
> can result in a missed message when the message is redispatched and auto
> acked as a duplicate.
> Failover interrupt should clear dispatched and unconsumed messages so that
> they can get redelivered.
> auto-acking a duplicate seems over eager. think best to poison pill and now
> that we can include a cause property it will be possible to differentiate.
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