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From guptaviv <>
Subject Re: Messages Stuck in the queue(with the broker)
Date Wed, 12 Aug 2009 09:42:15 GMT

FYI...  When we switched over to 5.2... we did not face this problem. Looks
like a bug in 5.1 version.

Thanks all of you for your suggestions!

Norbert Pfistner-2 wrote:
> We also experience stuck messages in activemq 5.1, slow consumers an 
> jdbc persistance.
> Searching for the reason and/or solution to this problem i stumbled last 
> week on this blog entry:
> So we set up our testing environmen with activemq 5.2 (which should fix 
> several other problams like the annoying broken stats in 
> jconsole/webconsole), turned off flow control and redurced the queu 
> prefetch size to 0.
> Well up to now no message got stuck.
> Maybe it's also usefull for your environnment.
> If it helps I'd be thankful for a short response on this 
> Greetings,
> Norbert
> bwtaylor schrieb:
>> 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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