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MQSeries.net Forum Index » IBM MQ API Support » Duplication of records using C++ API for MQ

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msvpraveen
PostPosted: Wed Apr 19, 2006 2:47 pm    Post subject: Duplication of records using C++ API for MQ Reply with quote

Novice

Joined: 07 Jul 2005
Posts: 12
I am using C++ API of MQ client to connect to a MQ and get records.
I am using the ImqQueue data structure in C++ API and get method with options set to MQGMO_WAIT | MQGMO_FAIL_IF_QUIESCING and time interval of 15s. Some of the records transfered using this program are getting duplicated.

To sort out whether this is a unique case of data problem I tried to resend the records and they went fine without any duplicates.

Can anyone tell me a possible scenario where records from MQ could be duplicated while reading from a program.

If some error happens during the get process can it be a possibility that we get the message but the message doesn't get deleted from the MQ.
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wschutz
PostPosted: Wed Apr 19, 2006 4:04 pm    Post subject: Reply with quote

Jedi Knight

Joined: 02 Jun 2005
Posts: 3316
Location: IBM (retired)
Two possibilities are;
(1) you were actually browsing the messages instead of doing a destructive get (GMO_BROWSE)
(2) the unit of work was rolled-back (MQBACK)
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