[jboss-jira] [JBoss JIRA] Commented: (JBMESSAGING-883) Bug in failover with multiple consumers on same queue

[Tim Fox (JIRA)]

    [ http://jira.jboss.com/jira/browse/JBMESSAGING-883?page=comments#action_12353968 ] 
            
Tim Fox commented on JBMESSAGING-883:
-------------------------------------

One solution would be not to start() any of the failed over connections until they've all been failed over.

But how do we know when all the connections have been failed over for a particular server?

> Bug in failover with multiple consumers on same queue
> -----------------------------------------------------
>
>                 Key: JBMESSAGING-883
>                 URL: http://jira.jboss.com/jira/browse/JBMESSAGING-883
>             Project: JBoss Messaging
>          Issue Type: Bug
>    Affects Versions: 1.2.0.CR1
>            Reporter: Tim Fox
>         Assigned To: Tim Fox
>            Priority: Blocker
>             Fix For: 1.2.0.GA
>
>
> If you have two connections with a consumer each on the same queue, and one of the consumers has consumed a message transactionally but not committed it.
> Then when failover occurs, if the second connection fails over first then it might "grab" the message before session::recoverDeliveries kicks in for the other connection.
> This means the message can get delivered more than once.

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