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Dear MQA,
On top your valuable feedback, I would like to seek your
advice on how to handle the DLQ message which has expiry time.
Though we have alert message upon items placed on DLQ, we
usually find that the item disappeared on DLQ. We guess the item
should have expired before we look at it. However, we worry whether
we have overlooked 'real' problem whose message has expired.
Would you mind share your idea/view/tips on tackling such kind
of DLQ items?
KK
----- Original Message -----
Sent: Wednesday, August 11, 2004 4:39
AM
Subject: Re: DLQ Maintenance
I
have all my DLQs monitored. We get an email when the depth goes over 0, a more
URGENT EMAIL!!! when the depth goes over 10, and a page when the depth goes
over 50.
We
manually handle the problem. I don't see very many conditions that can be
handled automatically. If a queue is missing, I'm not gonna have a script
automatically create it. If a queue is PUT_INHIBITED, I assume its for a good
reason, and don't want a script automatically enabling it. If a queue is full,
OK, maybe it would be nice to have it retry automatically. The assumption here
is that the destination queue will have had a chance to go down a bit. I get
that behavior by setting the Message Retry values on the channels themselves,
and letting them retry after 1 second one more time. If the queue is being
serviced, that's enough to keep things going. If the queue is not being
serviced, the message only gets hung up for a sec before going to the DLQ. The
DLQ handler wouldn't have any more luck at this point
anyway.
Moving the messages from the DLQ to another queue is just "sweeping the
problem under the rug". I don't see the concept of an application specific DLQ
that you can move messages to. The DLQ is a QM level entity. If the message
can' be delivered, the DLQ is where it belongs.
Greetings,
Just a
quick survey to see how different shops are handling these issues:
+ How are you handling the
'maintenance' of msgs in the DLQ? (How long do you keep them, criteria
for deletion, etc.)
+ Do you move
msgs from System DLQ to Appl-specific DLQs? Who is managing these
DLQs, the appls or the admins?
+ Do
you use the DLQ msg handler or another mechanism for DLQ maintenance?
(What about on z/OS - CSQUDLQH?)
Thanks in advance!
Cheers,
Art
Arthur C.
Schanz
Operating Systems Programmer I. - Specialist
Federal Reserve
Information Technology
AIMS - WebSphere MQ Support
IBM Certified
System Administrator - WebSphere MQ V5.3
IBM Certified Solution Designer
- WebSphere MQ V5.3
(804)
697-3889
[EMAIL PROTECTED]
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