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| Loss of Messages |
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| harshvajra |
 Posted: Tue Mar 04, 2008 11:04 pm Post subject: Loss of Messages |
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Apprentice
Joined: 23 Apr 2007
Posts: 46
Location: India
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Hello,
I have an MQ-java application putting and getting messages from a queue.
A client-Server architecture, hence to make sure there are no loss of messages during mqget call i've used MQGMO_SYNC_POINT.
This has worked fine during 2009 rc, which occurs very frequently.
Recently i've got a rc of 2195, during which im losing msg.
Can any tell me whats happens during such exceptions ?
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Failure is not a defeat,it's just a delay, Walk TALL |
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| Vitor |
| Posted: Wed Mar 05, 2008 1:57 am Post subject: Re: Loss of Messages |
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Grand High Poobah
Joined: 11 Nov 2005
Posts: 26093
Location: Texas, USA
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| harshvajra wrote: |
Recently i've got a rc of 2195, during which im losing msg.
Can any tell me whats happens during such exceptions ? |
10 seconds of research would have revealed:
| Code: |
| 2195 0x00000893 MQRC_UNEXPECTED_ERROR |
The queue manager has abended / crashed / been damaged / etc so because the queue manager can't anticipate the scenario (hence unexpected) anything can happen including message loss.
You should investigate the FDC file and resolve the problem using the sugested procedure.
_________________
Honesty is the best policy.
Insanity is the best defence. |
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| harshvajra |
| Posted: Wed Mar 05, 2008 3:04 am Post subject: |
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Apprentice
Joined: 23 Apr 2007
Posts: 46
Location: India
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Yes indeed.
The first thing i always do when i see an error is
mqrc reasonCode
"mqrc 2195
2195 0x00000893 MQRC_UNEXPECTED_ERROR"
I was trying to analyse this para from IBM manual with the result got from the application:-
"MQC.MQGMO_SYNCPOINT
Get the message under syncpoint control; the message is marked
as being unavailable to other applications, but it is deleted from
the queue only when the unit of work is committed. The message
is made available again if the unit of work is backed out."
The application is running on m/c with MQ Client installed, i had checked,but there were no .FDC files generated for the app/process that has encountered this exception.
That means, there is indeed a possibility of loss of message when such errors occur if i am not wrong from my assumption.
Any suggestions.
_________________
Failure is not a defeat,it's just a delay, Walk TALL |
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| Vitor |
| Posted: Wed Mar 05, 2008 3:13 am Post subject: |
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Grand High Poobah
Joined: 11 Nov 2005
Posts: 26093
Location: Texas, USA
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| harshvajra wrote: |
| The application is running on m/c with MQ Client installed, i had checked,but there were no .FDC files generated for the app/process that has encountered this exception. |
And none in the queue manager to which the client was attached?
| harshvajra wrote: |
| That means, there is indeed a possibility of loss of message when such errors occur if i am not wrong from my assumption. |
The nature of the 2195 means that the WMQ mechanisms have broken down, including those preventing message loss.
| harshvajra wrote: |
| Any suggestions. |
Fix the problem. You should never receive a 2195. Raise a PMR with IBM if necessary.
_________________
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Insanity is the best defence. |
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