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MQSeries.net Forum Index » General IBM MQ Support » CCDT file and load balancing across same named QM

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zrux
PostPosted: Fri Jan 31, 2025 11:30 pm    Post subject: CCDT file and load balancing across same named QM Reply with quote

Apprentice

Joined: 21 May 2006
Posts: 41
Location: UK

Hello

Using JMS and CCDT, will it be possible to use the "automatic reconnect" feature for MQ clients to connect back to 2 different QMs with same/similar names in a way that in case QM1 on node1 fails, the MQ JMS client can automatically connect to the QM1 on node2?

Please note-
1) this is NOT a MQ MI setup.
2) MQ version 9.4, and same for clients
3) We cannot use a traditional MQ cluster using cluster SDR/RCVRs
4) I have tried and found, if the MQ JMS client is replaced with the QM on the other side, it can detect a failure on None1 and automatically transfer the traffic to Node2.

Do I need the "MQ uniform cluster" to make the auto reconnect of JMS client to work?



I tried this with the following CCDT in json format, and didnt succeed unless the JMS MQ client program is restarted.
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fjb_saper
PostPosted: Sun Feb 02, 2025 5:32 pm    Post subject: Re: CCDT file and load balancing across same named QM Reply with quote

Grand High Poobah

Joined: 18 Nov 2003
Posts: 20756
Location: LI,NY

zrux wrote:
Do I need the "MQ uniform cluster" to make the auto reconnect of JMS client to work?

I tried this with the following CCDT in json format, and didnt succeed unless the JMS MQ client program is restarted.

I believe the answer is YES. For a dynamic automatic reconnect of the client with load balancing across multiple qmgrs, you do need a Uniform Cluster set up.

Hope it helps
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