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| barknee |
 Posted: Wed May 25, 2005 10:53 am Post subject: Clustering with .NET |
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Newbie
Joined: 25 May 2005
Posts: 5
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I am trying to connect to a clustered queue manager and cannot get a connection without naming the queue manager explicitly. Here is the code I am using and any help will be appreciated. Everything is running locally.
thanks
| Code: |
MQEnvironment.Hostname = Environment.MachineName;
MQEnvironment.Port = 10000;
MQEnvironment.Channel = "TO_QM1";
MQQueueManager qm = new MQQueueManager("");
MQQueue q = qm.AccessQueue("queue1", MQC.MQOO_OUTPUT | MQC.MQOO_BIND_NOT_FIXED, null, null, null);
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| jefflowrey |
| Posted: Wed May 25, 2005 10:59 am Post subject: |
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Grand Poobah
Joined: 16 Oct 2002
Posts: 19981
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There's nothing different about connecting to a clustered queue manager than a regular queue manager...
So this isn't a clustering question... 
What return code do you get for the code you posted?
EDIT:
Also, is "TO_QM1" a Server Connection Channel? It's not named like one, if it is.
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| barknee |
| Posted: Wed May 25, 2005 11:12 am Post subject: |
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Newbie
Joined: 25 May 2005
Posts: 5
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I am new to MQSeries so I thought that with clustering you do not have to specify the queue manager explicitly?
I think this fixed it. I was using the wrong channel. Is there anywhere in the docs (any docs) that explain this? I did not know if was a server connection channel that needed to be specified.
Now, another question
SYSTEM.DEF.SVRCONN -- SYSTEM.AUTO.SVRCONN
What is the difference? And after that, if it makes sense, can auto be used?
Thanks a lot |
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| vennela |
| Posted: Wed May 25, 2005 11:18 am Post subject: |
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Jedi Knight
Joined: 11 Aug 2002
Posts: 4055
Location: Hyderabad, India
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Those are automatically defined channels when creating the QMGR.
You could name something like YOURAPP.SVRCONN |
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| jefflowrey |
| Posted: Wed May 25, 2005 11:19 am Post subject: |
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Grand Poobah
Joined: 16 Oct 2002
Posts: 19981
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| barknee wrote: |
| I am new to MQSeries so I thought that with clustering you do not have to specify the queue manager explicitly? |
No. A Cluster is not a real object that can be connected to - it's a set of properties and services in a queue manager object.
You must always connect to a particular queue manager explicitly by either it's client address (network address, port, channel name) or it's server address (Queue Manager name), depending on where your program is running and how you want it to bind.
Since you are "new to MQ", then you should also know that you can't GET from queues that are not qlocal to the queue manager you are connected to. Clustering doesn't change this.
Also, MQ Clustering is not a failover solution. It's a load-balancing and administrative simplification solution.
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| barknee |
| Posted: Wed May 25, 2005 11:25 am Post subject: |
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Newbie
Joined: 25 May 2005
Posts: 5
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Thanks. Makes sense. Ok, last one, and I know this is a config issue. I spawn multiple threads to hammer the queues, however the first QM always takes the message. IE, the other local queues never see the messages. The threads are created on a hyperthreaded box but I fill the queue first and the messages never make it to the other queues.
Like i said I am sure this is config.
Thanks again. |
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| jefflowrey |
| Posted: Wed May 25, 2005 11:35 am Post subject: |
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Grand Poobah
Joined: 16 Oct 2002
Posts: 19981
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It's not config. It's default workload balancing.
In version 5, the local queue manager is always chosen if it hosts a copy of the queue you are putting to.
One approach to this is to have separate QMs for putting and getting - with no queues defined on the putting QM.
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| barknee |
| Posted: Wed May 25, 2005 11:39 am Post subject: |
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Newbie
Joined: 25 May 2005
Posts: 5
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You rock. I just checked that. I removed the clustered queue from the default QM and it worked like a charm.
thanks for your help again. This has been eating at me for hours. |
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| PeterPotkay |
| Posted: Wed May 25, 2005 2:02 pm Post subject: |
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Poobah
Joined: 15 May 2001
Posts: 7722
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| barknee wrote: |
I think this fixed it. I was using the wrong channel. Is there anywhere in the docs (any docs) that explain this? I did not know if was a server connection channel that needed to be specified.
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Peep the MQClient Manual. It has all the details on how MQClients connect to QMs.
Also, there is a manual just for .NET.
Both can be accessed via the documentation button at the top of this screen. Look up -  
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Peter Potkay
Keep Calm and MQ On |
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| jefflowrey |
| Posted: Wed May 25, 2005 4:03 pm Post subject: |
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Grand Poobah
Joined: 16 Oct 2002
Posts: 19981
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| PeterPotkay wrote: |
| Both can be accessed via the documentation button at the top of this screen. Look up - |
Actually, unless the sublinks work - which I don't see because of my browsers of choice - the documentation button is currently pointing to the wrong page at ibm.com.
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| vennela |
| Posted: Wed May 25, 2005 4:42 pm Post subject: |
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Jedi Knight
Joined: 11 Aug 2002
Posts: 4055
Location: Hyderabad, India
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| jefflowrey wrote: |
| PeterPotkay wrote: |
| Both can be accessed via the documentation button at the top of this screen. Look up - |
Actually, unless the sublinks work - which I don't see because of my browsers of choice - the documentation button is currently pointing to the wrong page at ibm.com. |
Works OK for me.
Are you using IE? If yes then try clearing history and try again. |
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| jefflowrey |
| Posted: Wed May 25, 2005 6:09 pm Post subject: |
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Grand Poobah
Joined: 16 Oct 2002
Posts: 19981
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| vennela wrote: |
| Works OK for me. |
When clicking on the main button, I get http://www-306.ibm.com/software/integration/wmq/library/manualsa/index.html
| vennela wrote: |
| Are you using IE? If yes then try clearing history and try again. |
If I were using IE, I would get the popup menu. I'm using Firefox - currently on an environment that only supports MQ via a third party port. And it's not NSK!
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| fjb_saper |
| Posted: Wed May 25, 2005 6:37 pm Post subject: |
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Grand High Poobah
Joined: 18 Nov 2003
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| jefflowrey |
| Posted: Thu May 26, 2005 3:27 am Post subject: |
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Grand Poobah
Joined: 16 Oct 2002
Posts: 19981
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| fjb_saper wrote: |
| Jeff the link has changed |
I know that. But the 'documentation' button that I get doesn't.
EDIT:
In fact, here's the HTML I get when I view source
<td><a target="_blank" href="http://www-3.ibm.com/software/ts/mqseries/library/manualsa/index.html" onMouseover="showDDNav('document.all[\'support\']','document.layers[\'support\']')" onMouseout="hideDDNav('document.all[\'support\']','document.layers[\'support\']')"><img src="http://www.mqseries.net/navbar/documentation.gif" width="123" height="19" alt="" border="0"></a></td>
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| barknee |
| Posted: Thu May 26, 2005 4:45 am Post subject: |
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Newbie
Joined: 25 May 2005
Posts: 5
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| Thanks for all of your help. I must say that I have read through the clustering docs, the .NET docs and the API doc(some of that) and I think IBM's tech writers suck. I have had to resort to PInvoke many times in .NET to get this stuff to work to find out the options that have to be passed around to get it to work. For example, the MQOD structure is very vague in the docs and they also do not go into the object descriptor information either. Anyway, I am having to write for this, MSMQ and Tuxedo all in one so it has to be done. Again thanks. |
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