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From "Brian Desai (JIRA)" <j...@apache.org>
Subject [jira] Created: (AMQ-1787) Too many expired queue messages on intermittent consumer causes ActiveMQ to hang
Date Tue, 10 Jun 2008 14:55:00 GMT
Too many expired queue messages on intermittent consumer causes ActiveMQ to hang
--------------------------------------------------------------------------------

                 Key: AMQ-1787
                 URL: https://issues.apache.org/activemq/browse/AMQ-1787
             Project: ActiveMQ
          Issue Type: Bug
          Components: Broker
    Affects Versions: 5.1.0
         Environment: Linux
Sun JDK 1.6.0
            Reporter: Brian Desai


I have a case where a queue consumer may become inactive for periods of time.  If too may
messages are sent to this queue, and they eventually expire (setting the TTL) before the consumer
comes back online, then once the consumer does come online, I see many of the following messages
printed to the broker console.

{quote}Failed to fire message expired advisory{quote}

Once this happens, it seems that no more messages go to any queues, not just the queue whose
consumer was down for a while.  I've looked at the web console, both before and after this
occurs, and the message counts for all queues stop.  It appears that the broker just gets
hung.  I have to kill the broker, and wipe out the data storage in order to get back to a
working state.

I've tried various memory settings, with the same result.  My TTL was fairly low (60 seconds),
as I was testing out the ability to expire messages.  The number of messages in the queue
that were expired were in the 1000+ range.  With a low number of expired messages (< 100),
there was no problem.

As a work around, I can disable sending of the advisory messages, and turn off processing
of expired messages, but this is not ideal.

{code:xml}
<beans>
  ....
  <broker  ...  advisorySupport="false">
    <destinationPolicy>
        <policyMap>
            <policyEntries>
                <policyEntry queue=">">
                    <deadLetterStrategy>
                        <sharedDeadLetterStrategy processExpired="false"/>
                    </deadLetterStrategy>
                </policyEntry>
                ...
            </policyEntries>
        </policyMap>
    </destinationPolicy>
    ...
  </broker>
</beans>
{code}

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