[esb-issues] [JBoss JIRA] Closed: (JBESB-1456) Add documentation to describe the effect of clustered JMS queues on service invocations

[Mark Little (JIRA)]

     [ http://jira.jboss.com/jira/browse/JBESB-1456?page=all ]

Mark Little closed JBESB-1456.
------------------------------

    Fix Version/s: 4.2.1 CP1
       Resolution: Done

Update the documentation on ESB replication.

> Add documentation to describe the effect of clustered JMS queues on service invocations
> ---------------------------------------------------------------------------------------
>
>                 Key: JBESB-1456
>                 URL: http://jira.jboss.com/jira/browse/JBESB-1456
>             Project: JBoss ESB
>          Issue Type: Task
>      Security Level: Public(Everyone can see) 
>          Components: Documentation
>    Affects Versions: 4.2.1
>         Environment: SOA-P 4.2.0 beta 1
>            Reporter: Martin Vecera
>         Assigned To: Mark Little
>            Priority: Minor
>             Fix For: 4.2.1 CP1
>
>
> During failover testing I found out very interresting behaviour...
> I had two nodes (JBossESB servers) in a cluster.
> I deployed identical service to both of them. Each service had:
> 1) clustered gateway queue served by 2 threads
> 2) clustered queue for ESB aware messages served by 2 threads.
> I send several messages to the first node and expected them to be load balanced among the nodes. This didn't happend.
> I figured out that the load balancing came in to the play twice:
> 1) while sending the message to GW
> 2) while sending the message from GW to ESB-aware queue
> Because there were more than one thread for each queue the loadbalancing went in the way where some messages were really sent to the GW on the second node but then they returned back to the first one.
> This is definitely configuration failure (the queue for ESB aware messages mustn't be clustered) but we should document this I think.

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