MQSeries.net :: View topic - Messages staying on SYSTEM.CLUSTER.TRANSMIT.QUEUE (again!)

TonyD · Posted: Sat Jun 14, 2003 6:47 am Post subject:

This has just started happening on an AIX machine (our Development machine), MQ 5.2, CSD6. We have been running 8 queue managers (2 separate development environments each with a 3 QM cluster) on the machine for some time without this happening. We just added four new queue managers (a new environment) and almost immediately started to get messages sitting on the TRANSMIT queues in a couple of the old queue managers (not the new ones). Nothing in the error logs.
To move the messages we have been starting the cluster sender channels from the MQ Explorer 'Cluster Queue Managers' display where one can see the automatically created channels. We stop the channels and then start them, they go to 'Starting' and stay in that status, never going to 'Running', but the messages move from the Transmit queue. I have noticed that simply displaying the Channel Status of the channels is sufficient to make the channel status go from 'Inactive' to 'Starting', but the messages stay on the Transmit queue.
I know this thread has been raised before (I did myself 18 months ago running under 5.1!), but am surprised that it is still happening at the 5.2/CSD6 level. IBM's response is to run the channels continuously which is hardly diagnosing and repairing the problem.
We are moving to 5.3 in the near future and the problem may go away. However I think we have been hearing for some time that if you go to a new release/CSD the problem will go away, but this is an unsatisfactory situation since we don't know how to recreate the problem, and therefore how to verify that it has been fixed.
I would be interested to know if other users still experience this problem, what MQ levels you are on, whether you have been able to work out what causes this behaviour, and how you have dealt with it to avoid disruption in production environments.