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MQ Error - Message not getting read from request queue

 
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abhi484u
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Joined: 31 Aug 2006
Posts: 9

PostPosted: Wed Jul 28, 2010 12:50 pm    Post subject: MQ Error - Message not getting read from request queue
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Hi,

I have an issue with MQ service in mainframe.

For an existing MQ service some times the message gets accumulated in the request queue.

Queues are set up as follow

Java Mainframe
Alias Q --------------> Local Request Q --> MF Process runs over here
Alias Q <------------- Remote Reply Q <--- Response of process from MF

when ever this fails I am getting message accumulated in Local Request of Q of mainframe.
As per company std I can't set the service to trigger always. It is set to trigger for first mesage only.

Any thoughts on this please help.
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Ronald Burr

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Joined: 22 Oct 2009
Posts: 293
Location: U.S.A.

PostPosted: Wed Jul 28, 2010 5:19 pm    Post subject:
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You must ( somehow ) insure that the MF process never abends.
That may entail having to validate every incoming field ( e.g. numeric fields only contain numeric data, etc. ); examining and dealing ( appropriately ) with every file status code; planing for, and dealing with every table look-up result ( e.g. not-found condition ),\; if CICS, insuring that every possible CICS error is HANDLEd so as to prevent an actual abend, etc.

"Bad" messages should be discarded and some kind of response posted into the response queue to indicate that an error has occurred.

IF the MF process is a CICS transaction, it may be necessary to end the current thread and re-invoke the transaction to handle subsequent messages ( if any ) - e.g. EXEC CICS RETURN TRANSID(xxxx).
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