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MQSeries.net Forum Index » General IBM MQ Support » More than one Request from a MQClient to a MQManager

More than one Request from a MQClient to a MQManager

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nirmala

Posted: Wed Dec 11, 2002 2:03 am Post subject: More than one Request from a MQClient to a MQManager

Novice

Joined: 08 Oct 2002
Posts: 20

Can there be more than one request initiated (and active at the same time) from the same MQclient to the same Qmanager????
We have a case where we need to send a request (running in an infinite loop) from a client to look for the message in the Queue (Q1) in a Queue manager (QM1) . At the same time we need to add a message to the same Queue (Q1) in the Queue manager (Q1) from the same client.

The second request failed with the error code 2042 (Object in use)

If this means the Q manager lock Do we have any other way to over come this???????

MichaelR

Posted: Wed Dec 11, 2002 6:14 am Post subject:

Apprentice

Joined: 20 May 2002
Posts: 37
Location: Tampa

Should we assume these are 2 different application threads?

If so, there is NO application limitation. I have run a large number of MQC application threads from the same workstation putting and getting messages to/from the same queue on a single MQM. Realize that my gets were done using the MSGID.

Can you provide a simple description of your applications MQ logic and the specific queues definition?

In short, we do what you (appear to) are attempting every day without issue.

vmcgloin

Posted: Wed Dec 11, 2002 6:33 am Post subject:

Knight

Joined: 04 Apr 2002
Posts: 560
Location: Scotland

Check that the application that has the queue open for input specifies MQOO_INPUT_SHARED (Open queue to get messages with shared access). or the equivalent for whatever language you are using.

The 2042 could be due to you already having the object open for exclusive input. Similarly check that the second application is not requesting exclusive access.

bower5932

Posted: Wed Dec 11, 2002 6:34 am Post subject:

Jedi Knight

Joined: 27 Aug 2001
Posts: 3023
Location: Dallas, TX, USA

Did you open your queue as MQOO_INPUT_EXCLUSIVE? If so, that will keep your second request from getting the queue open.

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