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From Johan Edstrom <>
Subject Re: ActiveMQ 5.5 sends infinite duplicate message
Date Tue, 04 Oct 2011 03:17:09 GMT
Are you acking that message/tx?

On Oct 3, 2011, at 18:04, "singaravelu.subu" <> wrote:

> Hi,
> I'm using Active MQ 5.5. In one of my sample project, when I was
> experimenting with Queue, I observed the activeMQ server was sending the
> same message over and over infinitely to the consumer. 
> Here are observations:
> 1. The Admin console always shows one pending message in the queue and never
> gone to zero. When I looked at the subscriber, the number of messages
> received were more and out of those messages, I could see only one message
> repeated many times.
> 2. The broker never sent this problematic message alone to the subscriber.
> It always sent this message along with the new message reaching the queue.
> ie, when the publisher post a new message to the queue, the subscriber
> receives two message, one is actual message (new) and the other is
> problematic message (one got stuck in queue).
> 3. Though for how many number of times the problematic message is send, the
> Admin console always said one pending message in the queue and the consumer
> don't receive it unless a new message reaches the queue.
> The problem got solved after I delete kahadb directory. Not sure what
> scenario might have caused this issue and even it could not be reproduced
> again.
> Let me know if anyone experienced the same issue. Also not sure how to
> validate if this case had happens in production with millions of transaction
> per day.
> Is there a way I put defensive code in the consumer to ignore these
> duplicate messages or how can I configure the monitoring tool to notify such
> an issue?
> thanks,
> Sing
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