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Message
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| Ashok Kumar |
 Posted: Wed Aug 13, 2014 7:03 am Post subject: Problem of Placing Message in Queue |
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Acolyte
Joined: 01 Jul 2013
Posts: 53
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Hi WMB Developers,
I am successfully propagated message to Queue using Java compute node but i am unable to see message in queue.
Thanks in advance. |
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| mqjeff |
| Posted: Wed Aug 13, 2014 7:13 am Post subject: |
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Grand Master
Joined: 25 Jun 2008
Posts: 17447
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Great!
So now you have a bug in your code somewhere.
Time to start debugging it! |
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| Vitor |
| Posted: Wed Aug 13, 2014 7:13 am Post subject: Re: Problem of Placing Message in Queue |
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Grand High Poobah
Joined: 11 Nov 2005
Posts: 26093
Location: Texas, USA
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| Ashok Kumar wrote: |
| I am successfully propagated message to Queue using Java compute node but i am unable to see message in queue. |
It's unsupported to write messages to queue with anything other than the MQOutput node, doesn't work that well (as you've found), will at best screw up the broker's transaction control (which I think is where you message is) & will at worst bring the execution group or broker down.
_________________
Honesty is the best policy.
Insanity is the best defence. |
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| Ashok Kumar |
| Posted: Wed Aug 13, 2014 7:17 am Post subject: |
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Acolyte
Joined: 01 Jul 2013
Posts: 53
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Thanks for Replies.
But I didnt get any errors while placing the message in queue. |
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| Vitor |
| Posted: Wed Aug 13, 2014 7:20 am Post subject: |
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Grand High Poobah
Joined: 11 Nov 2005
Posts: 26093
Location: Texas, USA
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| Ashok Kumar wrote: |
| I didnt get any errors while placing the message in queue. |
And?
_________________
Honesty is the best policy.
Insanity is the best defence. |
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| Ashok Kumar |
| Posted: Wed Aug 13, 2014 7:21 am Post subject: |
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Acolyte
Joined: 01 Jul 2013
Posts: 53
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| What can i do for viewing the message in queue |
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| mqjeff |
| Posted: Wed Aug 13, 2014 7:26 am Post subject: |
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Grand Master
Joined: 25 Jun 2008
Posts: 17447
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Show your work.
Take a user trace of the whole flow.
Use a trace node.
Take simple, basic steps to debug your code.
And, of course, throw out your whole design if you are using MQ APIs to read or write from queues from inside a JavaCompute node.
You WILL cause *MAJOR* problems if you do this. |
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| Vitor |
| Posted: Wed Aug 13, 2014 7:30 am Post subject: |
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Grand High Poobah
Joined: 11 Nov 2005
Posts: 26093
Location: Texas, USA
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| Ashok Kumar wrote: |
| What can i do for viewing the message in queue |
What makes you think the message actually made it to the queue?
My guess is your message made it, but because you sent it from a JCN and not from the WMB resources it's not committed. And I don't think you can fix that in your code.
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Honesty is the best policy.
Insanity is the best defence. |
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| Vitor |
| Posted: Wed Aug 13, 2014 7:31 am Post subject: |
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Grand High Poobah
Joined: 11 Nov 2005
Posts: 26093
Location: Texas, USA
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| mqjeff wrote: |
And, of course, throw out your whole design if you are using MQ APIs to read or write from queues from inside a JavaCompute node.
You WILL cause *MAJOR* problems if you do this. |
My assumption (from the original post) is that he's using either those APIs or JMS to put the message.
And that's why there's no sign of it.
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| zpat |
| Posted: Wed Aug 13, 2014 7:50 am Post subject: |
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Jedi Council
Joined: 19 May 2001
Posts: 5866
Location: UK
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Do NOT use a JCN to do anything in Java that can be done directly in WMB which of course includes all access to queues, databases, files etc.
If you use JAR files in WMB flows then generally you have done something wrong. Use the IBM provided features.
Also do not use JMS nodes when MQ nodes will do the job. I have seen people using JMS nodes to put and get MQ messages in WMB and it is just pointless and more complex to configure.
Get some training in basic WMB - putting to a queue is lesson one, day one. Don't code Java whenever possible.
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Well, I don't think there is any question about it. It can only be attributable to human error. This sort of thing has cropped up before, and it has always been due to human error. |
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| Ashok Kumar |
| Posted: Wed Aug 13, 2014 7:55 am Post subject: |
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Acolyte
Joined: 01 Jul 2013
Posts: 53
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| I am creating sample xml message using java compute node but not using any API or JMS |
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| Vitor |
| Posted: Wed Aug 13, 2014 7:58 am Post subject: |
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Grand High Poobah
Joined: 11 Nov 2005
Posts: 26093
Location: Texas, USA
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| Ashok Kumar wrote: |
| I am creating sample xml message using java compute node but not using any API or JMS |
So now you need to be very, very clear on what your flow is doing as both of us are now unclear on what you're doing. If you're creating an XML message with a JCN and putting it to the queue with an MQOutput node then:
| mqjeff wrote: |
So now you have a bug in your code somewhere.
Time to start debugging it!
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So this advice is highly relevant:
| mqjeff wrote: |
Show your work.
Take a user trace of the whole flow.
Use a trace node.
Take simple, basic steps to debug your code.
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_________________
Honesty is the best policy.
Insanity is the best defence. |
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| Vitor |
| Posted: Wed Aug 13, 2014 7:59 am Post subject: |
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Grand High Poobah
Joined: 11 Nov 2005
Posts: 26093
Location: Texas, USA
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| Ashok Kumar wrote: |
| I am creating sample xml message using java compute node but not using any API or JMS |
Of course if you're not using any API, JMS or MQOutput node I've found why the message isn't on the queue.
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Honesty is the best policy.
Insanity is the best defence. |
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| zpat |
| Posted: Wed Aug 13, 2014 8:11 am Post subject: |
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Jedi Council
Joined: 19 May 2001
Posts: 5866
Location: UK
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Or the queue is being read from instantly! 
_________________
Well, I don't think there is any question about it. It can only be attributable to human error. This sort of thing has cropped up before, and it has always been due to human error. |
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| Vitor |
| Posted: Wed Aug 13, 2014 8:22 am Post subject: |
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Grand High Poobah
Joined: 11 Nov 2005
Posts: 26093
Location: Texas, USA
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| zpat wrote: |
| Or the queue is being read from instantly! |
It's a possibility.... 
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Insanity is the best defence. |
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