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MQSeries.net Forum Index » General IBM MQ Support » Problems Altering Queue Aliases

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sjclark1
PostPosted: Tue Nov 27, 2007 9:48 am    Post subject: Problems Altering Queue Aliases Reply with quote

Apprentice

Joined: 06 Jan 2003
Posts: 35
Location: Scotland
Folks

Another application uses a queue alias and server connection channel to send us messages.

Occasionally we need to change this alias to point to a different local queue. However it is not possible to do this while they are connected to the queue (message says something about the object being in use).

The only way I can alter the alias without getting the other app to take their app down, is to use the FORCE option after I do "alter qa(Qname)".

However at that point the other app still has an handle to the "previous" queue local. The other app then needs to be bounced so it can connect to the new queue.

Any suggestions for how I could change the queue alias and make the whole thing transparent to the other system, i.e. no need for the other app to explicitly reboot / reconnect?? Or is the other app connecting in some funny way?

Thanks in advance for any suggestions.
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PeterPotkay
PostPosted: Tue Nov 27, 2007 10:42 am    Post subject: Reply with quote

Poobah

Joined: 15 May 2001
Posts: 7722
There is no way around this. The app will have to reopen the queue (it does not have to do a full reconnect to the QM though)
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Peter Potkay
Keep Calm and MQ On
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jefflowrey
PostPosted: Tue Nov 27, 2007 10:44 am    Post subject: Reply with quote

Grand Poobah

Joined: 16 Oct 2002
Posts: 19981
This is how qaliases work, apps need to close and re-open in order to pick up changes.

It may be useful to have the app code a special signal of some kind (perhaps a special message on the queue) to cause it to do this, without having to restart the whole app.
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sjclark1
PostPosted: Wed Nov 28, 2007 2:27 am    Post subject: Reply with quote

Apprentice

Joined: 06 Jan 2003
Posts: 35
Location: Scotland
Thanks gents.
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