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From bwtaylor <>
Subject Re: Messages Stuck in the queue(with the broker)
Date Fri, 24 Jul 2009 17:29:35 GMT

We experience this problem as well. It's a very serious issue, and I hope it
gets some attention. We don't have test code that can reproduce it, as it
seems intermittent. We can reproduce it when we get lucky by jamming a lot
of messages into queues with slow consumers. We've seen it with single or
multiple consumers. Typically we're using camel to consume the messages.

When we've seen this occur, using jconsole shows that the inflight count
remains low, indicating the stuck messages are not being dispatched. The
messages are in the database, so like others, bouncing the broker restores
the problem. We did manage to capture a heap dump during the failure. We
tried to inspect this, but didn't get much out of it. We're currently on
activemq 5.1. We started to try the 5.3 snapshot to see if we could
reproduce it with 5.3, but because of the oracle master/slave breakage I
just reported in the dev mailing list, that version doesn't work for us at
the moment.
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