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vmcgloin · Posted: Fri Apr 05, 2002 7:31 am Post subject:

I am new to clustering, and trying to understand and hopefully solve a problem in our infrastructure...

We have two servers, each provides a hub containing 4 qmgrs. All 8 of these qmgrs are in a single cluster. One of our applications is allowed to run on only one of these qmgrs. But, we have the queues it reads defined on 2 of them - one on each hub so it can quickly be switched if there is any problem. The queues on the unused qmgr are put_inhibited when not in use.
Now, this has so far worked fine. But since upgrading one hub from MQ 5.1 to 5.2, we have had problems. Another application tries to put messages to the put_inhibited queue half of the time - it only specifies the queue name, not the qmgr to put to. The problem is on the 5.1 side.

Can anyone explain to me why it worked to start with - when 2 queues are available with the same name how does an application decide which one to use? How does it know that one is put_inhibited?

Or, what we can do to resolve this? Should we be removing the put_inhibited from the cluster when not in use?

Thanks for any help,
Vicky