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From "Ryan Rolland (JIRA)" <>
Subject [jira] Created: (AMQ-2780) ActiveMQ not preserving Message Order
Date Wed, 16 Jun 2010 04:14:51 GMT
ActiveMQ not preserving Message Order

                 Key: AMQ-2780
             Project: ActiveMQ
          Issue Type: Bug
    Affects Versions: 5.3.0
         Environment: Windows XP, JDK 1.6.0_07
            Reporter: Ryan Rolland
            Priority: Critical

I believe I have found a bug in message order delivery in ActiveMQ. I have taken the example
benchmark consumer and producer programs and made the following modifications:
1)	Added a counter to keep track manually of the message order.
2)	Made the transmitted number of bytes per message random between 1 and 64 bytes.
3)	Added a random delay between 1 and 10 seconds triggered after every 100000 messages transferred
on the publishing side.
After running for a few minutes I begin to see violations in the message delivery order. In
my most recent run I have counted 54 violations over the course of an hour.

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