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| Vin |
 Posted: Wed Aug 25, 2004 1:50 pm Post subject: question on mqseries pub/sub |
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Master
Joined: 25 Mar 2002
Posts: 212
Location: India
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just getting my hands dirty on MQSeries pub/sub. I tried running the sample program JMSPubSub with the publisher option and it went fine. When I tried to use the same program as a subscriber I'm getting the following message
Exception in thread "main" javax.jms.JMSException: MQJMS2008: failed to open MQ queue
In a pub/sub do I need to create a queue for the subscriber to register its subscription? I have the broker running on my machine and I'm using the MA0C support pac. Do I need to create a queue with the same name as the topic that I'm using for publishing the messages? appreciate your help |
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| bower5932 |
| Posted: Thu Aug 26, 2004 5:23 am Post subject: |
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Jedi Knight
Joined: 27 Aug 2001
Posts: 3023
Location: Dallas, TX, USA
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| There is a mqjms_psq.mqsc file in the java\bin subdirectory that needs to be run to set up JMS queue definitions. |
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| bower5932 |
| Posted: Thu Aug 26, 2004 5:30 am Post subject: |
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Jedi Knight
Joined: 27 Aug 2001
Posts: 3023
Location: Dallas, TX, USA
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I just tried the JMSPubSub and it worked for me. I had already created my JMS definitions via the mqsc file, so that is probably your error.
Also, if you are just starting out with publish/subscribe, there are also a couple of samples at:
http://www.developer.ibm.com/tech/sampmq.html
You can look for mqjmspub.java and mqjmssub.java. They also have a link in the prologue to instructions on how to run them. |
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| Vin |
| Posted: Thu Aug 26, 2004 9:52 am Post subject: |
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Master
Joined: 25 Mar 2002
Posts: 212
Location: India
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Thanks for the reply guys but the problem is like this.
I'm able to run the JMSPubSub if the broker is running on the local queue manager and I want to publish and subscribe to a certain topic, but if the queuemanager itself is remote and I have a client connection to it using JMS, I"m able to publish the message fine but while subscribing to it I get the message "Failed to open MQQueue".
My question is if the queuemanager is remote how do I subscribe to the topic? do I have to define any channels from the MQ side? |
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| jefflowrey |
| Posted: Thu Aug 26, 2004 9:54 am Post subject: |
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Grand Poobah
Joined: 16 Oct 2002
Posts: 19981
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| Vin wrote: |
| but while subscribing to it I get the message "Failed to open MQQueue". |
What is the reason code/linked exception?
_________________
I am *not* the model of the modern major general. |
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| bower5932 |
| Posted: Thu Aug 26, 2004 10:05 am Post subject: |
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Jedi Knight
Joined: 27 Aug 2001
Posts: 3023
Location: Dallas, TX, USA
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I just re-ran it with a client connection, and it works fine. Modify the code to catch the linked exception:
| Code: |
} catch( JMSException je ) {
System.out.println("JMS Exception: " + je);
// check for a linked exception
Exception le = je.getLinkedException();
if (le != null) {
System.out.println("Linked exception: " + le);
}
} |
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| Vin |
| Posted: Thu Aug 26, 2004 3:05 pm Post subject: |
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Master
Joined: 25 Mar 2002
Posts: 212
Location: India
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Here is the linked exception
Linked Exception com.ibm.mq.MQException: MQJE001: Completion Code 2, Reason 2085 |
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| fjb_saper |
| Posted: Thu Aug 26, 2004 3:13 pm Post subject: |
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Grand High Poobah
Joined: 18 Nov 2003
Posts: 20768
Location: LI,NY
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2085 MQRC_UNKNOWN_OBJECT_NAME
Are you sure all your object are defined right and or that you are accessing the right qmgr ? |
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| joerg.sailer |
| Posted: Fri Aug 27, 2004 3:38 am Post subject: javax.jms.JMSException: MQJMS2008: failed to open MQ queue |
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Newbie
Joined: 09 Aug 2004
Posts: 4
Location: Germany
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Hello,
just check the parameters of the queue-handle-constructor. This exception will also be thrown if you try to USE a wrong/invalid handle.
The parameters of the constructor are named very curious, so I prefer to use the default-constructor MQQueue() and set the queue-manager and the queue-name by using
mqq.setBaseQueueManagerName(queueMgr);
mqq.setBaseQueueName(queueName);
Joerg |
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| bower5932 |
| Posted: Fri Aug 27, 2004 6:30 am Post subject: |
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Jedi Knight
Joined: 27 Aug 2001
Posts: 3023
Location: Dallas, TX, USA
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| bower5932 wrote: |
| There is a mqjms_psq.mqsc file in the java\bin subdirectory that needs to be run to set up JMS queue definitions. |
Double-check that you actually used runmqsc with this file against your qmgr. This is the file that defines queues that are needed for subscribers. |
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