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MQSeries.net Forum Index » General Discussion » Queue manager Not being created... Interesting one...

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mqonnet
PostPosted: Fri Apr 04, 2003 2:16 pm    Post subject: Queue manager Not being created... Interesting one... Reply with quote

Grand Master

Joined: 18 Feb 2002
Posts: 1114
Location: Boston, Ma, Usa.

Discovered this problem while i was playing around a bit.

I wrote a "C" program to create and "n" number of queue managers for my testing purposes. It works fine all the time, creating and staring them. But fails always when it reaches 113. Not sure if this is a magic figure or what... :).

As for the error.

Here's an extract from system log

-------------------------------------------------------------------------------
04/04/2003 16:53:11
AMQ6118: An internal MQSeries error has occurred (20806805)

EXPLANATION:
An error has been detected, and the MQSeries error recording routine has been
called.
ACTION:
Use the standard facilities supplied with your system to record the problem
identifier, and to save the generated output files. Contact your IBM support
center. Do not discard these files until the problem has been resolved.
-------------------------------------------------------------------------------
04/04/2003 16:53:11
AMQ6184: An internal MQSeries error has occurred on queue manager QM113.

EXPLANATION:
An error has been detected, and the MQSeries error recording routine has been
called. The failing process is process 14840.
ACTION:
Use the standard facilities supplied with your system to record the problem
identifier, and to save the generated output files. Contact your IBM support
center. Do not discard these files until the problem has been resolved.
-------------------------------------------------------------------------------
04/04/2003 16:53:11
AMQ6118: An internal MQSeries error has occurred (20806716)

EXPLANATION:
An error has been detected, and the MQSeries error recording routine has been
called.
ACTION:
Use the standard facilities supplied with your system to record the problem
identifier, and to save the generated output files. Contact your IBM support
center. Do not discard these files until the problem has been resolved.
=================


I also got an FFST raised alongside which is as below.

+-----------------------------------------------------------------------------+
| |
| MQSeries First Failure Symptom Report |
| ===================================== |
| |
| Date/Time :- Fri April 04 16:53:11 Pacific Standard Time 2003 |
| Host Name :- TEST (NT Version 5.0 Build 2195: Service Pack 3) |
| PIDS :- 5639B43 |
| LVLS :- 5200 |
| Product Long Name :- MQSeries for Windows NT and Windows 2000 |
| Vendor :- IBM |
| Probe Id :- HL000001 |
| Application Name :- MQM |
| Component :- hlgStartLog |
| Build Date :- Nov 7 2000 |
| CMVC level :- p000-L001106 |
| Build Type :- IKAP - (Production) |
| UserID :- Fred |
| Process Name :- C:\Program Files\MQSeries\bin\amqzxma0.exe |
| Process :- 00014840 |
| Thread :- 00014848 |
| QueueManager :- QM113 |
| Major Errorcode :- xecF_E_UNEXPECTED_RC |
| Minor Errorcode :- hrcE_MQLO_SEMA |
| Probe Type :- MSGAMQ6118 |
| Probe Severity :- 2 |
| Probe Description :- AMQ6118: An internal MQSeries error has occurred |
| (20806805) |
| Arith1 :- 545286149 20806805 |
| |
+-----------------------------------------------------------------------------+

MQM Function Stack
kpiStartup
apiStartup
aocStartDAP
almStartup
alsInitGlobal
hlgStartLog
xcsFFST

MQM Trace History
----------} xstAllocBlockInSharedMemSet rc=OK
---------} xstAllocateMemBlock rc=OK
--------} xcsAllocateMemBlock rc=OK
-------} hosCreateMutexSem rc=OK
-------{ hosCreateMutexSem
--------{ xcsAllocateMemBlock
---------{ xstAllocateMemBlock
----------{ xstAllocBlockInSharedMemSet
-----------{ xstAllocBlockInAnExtentOnList
------------{ xstSerialiseExtentList



***************

Amazingly enough though, the qm, QM113 did not get started. So, i went into the errors directory of this qm to see nothing in there. NO mqerrlog file in it at all. So, which meant that the QM was not properly created at all.

The question are.

1) Why does this happen.
2) Is there any reasoning behind it and how to find out what went wrong. Since there isnt much than the info that i posted here to show.
3) Has anyone else come accross this or is this a known bug.
4) For that matter, has anyone tried something like this and if yes, what was the outcome.

I am still trying to investigate this further, but i doubt would go anywhere.

Platform : Win2k.
MQ rel : V5.2 GA

When i get a chance i shall try and see if i can reproduce this on V5.3, but this is it for now.

Any inputs highly appreciated.

It could be pretty much possible that this is a bug and has been resolved in either CSD's or v5.3, and i am not aware of it.

Cheers
Kumar
_________________
IBM Certified WebSphere MQ V5.3 Developer
IBM Certified WebSphere MQ V5.3 Solution Designer
IBM Certified WebSphere MQ V5.3 System Administrator
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bower5932
PostPosted: Fri Apr 04, 2003 2:58 pm    Post subject: Reply with quote

Jedi Knight

Joined: 27 Aug 2001
Posts: 3023
Location: Dallas, TX, USA

There are a couple of WMQ 5.3 APARs that may be related: IY33837 and IY33836. However, they look more like problems related to migrating from one release of MQ to another....
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mqonnet
PostPosted: Fri Apr 04, 2003 4:14 pm    Post subject: Reply with quote

Grand Master

Joined: 18 Feb 2002
Posts: 1114
Location: Boston, Ma, Usa.

Bower, thanks for your response. But this is a fresh installation of V5.2. I had V5.2.1 on this system earlier and i uninstalled that version and installed V5.2.

Dont think this may have anything to do with the problem. But just wanted to put forth.

So, per you, this problem might be a known one and might have been fixed in V5.3.???


Any inputs, appreciated.

Cheers
Kumar
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bduncan
PostPosted: Sat Apr 05, 2003 11:56 am    Post subject: Reply with quote

Padawan

Joined: 11 Apr 2001
Posts: 1554
Location: Silicon Valley

The most queue managers I've ever tried defining on one machine was like 3 or 4... Clearly there must be some upper limit to the number of queue managers you can have on one machine, which would probably come down to memory, semaphores, etc...
Too bad you are on Win2k. Otherwise I'd recommend tweaking some of the kernel parameters, and then see if this allows you to go above 113...
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Brandon Duncan
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mqonnet
PostPosted: Sat Apr 05, 2003 6:13 pm    Post subject: Reply with quote

Grand Master

Joined: 18 Feb 2002
Posts: 1114
Location: Boston, Ma, Usa.

Thanks Brandon for the input.

I shall try to test this on Unix when i get a chance. The only reason i had this post was to let users and IBM know about this, if not already known. And if any one else faced this problem, what was the workaround.

Since this is just a sample app that i wrote while i was playing, it is not of any priority and does not hold any significance.

But if someone gets around this, please do post your experiences.

Thanks for all your inputs though.

Cheers
Kumar
_________________
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IBM Certified WebSphere MQ V5.3 Solution Designer
IBM Certified WebSphere MQ V5.3 System Administrator
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bower5932
PostPosted: Mon Apr 07, 2003 5:23 am    Post subject: Reply with quote

Jedi Knight

Joined: 27 Aug 2001
Posts: 3023
Location: Dallas, TX, USA

To be honest, I don't think the APARs listed above are your problem. They are similar, but they only occurred when migrating (which you aren't doing). I'm kind of inclined to agree with Brandon on your having reached an upper limit that isn't documented.
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