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From "Jason Carreira (JIRA)" <>
Subject [jira] Created: (AMQ-1750) Message Groups: Not working with Mule 2.0.1 feeding AMQ 5.1
Date Tue, 27 May 2008 16:15:02 GMT
Message Groups: Not working with Mule 2.0.1 feeding AMQ 5.1

                 Key: AMQ-1750
             Project: ActiveMQ
          Issue Type: Bug
          Components: Broker
    Affects Versions: 5.1.0
         Environment: Mule 2.0.1 feeding AMQ 5.1 
            Reporter: Jason Carreira

I was trying to use Mule 2.0.1 to read a directory and feed the file contents into an AMQ
5.1 Queue. The issue is that I need to handle files with the same first part of the file name
(before the extension) serially so as to not have race conditions and optimistic concurrency
exceptions. Therefore I built a special Transformer to transform the Object I built from the
file into a JMS message which sets the JMSXGroupID property. When running all in one process,
I see it finding the groupID and looking up the consumer, but when I run it on 3 processes
(feeder, AMQ, and processor) the messages are getting read by different consumers / Threads
and I get concurrent modification exceptions.

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