| Author |
Message
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| sido |
 Posted: Tue Feb 21, 2006 12:20 am Post subject: MQJE016: MQ queue manager closed channel immediately during |
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Novice
Joined: 02 Feb 2004
Posts: 23
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Hi,
We are getting the following exception while creating a QueueManager object.
MQJE016: MQ queue manager closed channel immediately during connect
Closure reason = 2009
We are using AIX environment, and here is the code snippet which gets tries to get the connection with queue manager.
| Code: |
public MQQueueManager openQueueManager(String queueManagerName)
throws MQException {
try {
MQEnvironment.hostname =localhost
MQEnvironment.channel =CHANNEL1
MQEnvironment.port =5555
MQEnvironment.userID = mqm
MQEnvironment.properties.put( MQC.TRANSPORT_PROPERTY, MQC.TRANSPORT_MQSERIES_CLIENT);
queueManager = new MQQueueManager(queueManagerName);
if (queueManager == null) {
LOGGER.debug("Unable to create queue manager object.");
} else {
LOGGER.info("Queue manager object created successfully.");
}
} catch (MQException e) {
LOGGER.error(
"MQException while creating queue manager object."
+ e.getMessage());
throw e;
} catch (Exception e) {
LOGGER.error(
"Exception while creating queue manager object."
+ e.getMessage());
throw new MQException(
MQException.MQCC_FAILED,
MQException.MQCC_FAILED,
e);
}
return queueManager;
}
|
We confirmed that the Queue manager was up and running, and the problem got fixed after restarting the queue manager.
And this problem is not consistent, we are getting this exception only when we are executing the above method.
Is anything missing in the above code ??
Please let us know the sol'n |
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| mvic |
| Posted: Tue Feb 21, 2006 1:15 am Post subject: Re: MQJE016: MQ queue manager closed channel immediately dur |
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Jedi
Joined: 09 Mar 2004
Posts: 2080
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| What MQ versions / OS platforms? Also, importantly if at MQ 5.3, what CSD are you at, (a) on client, and (b) on server? |
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| sido |
| Posted: Tue Feb 21, 2006 1:23 am Post subject: |
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Novice
Joined: 02 Feb 2004
Posts: 23
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Hi,
Herez the config details..
Server:
O/S: AIX
MQ ver: 5.3
CSD: 10
Client:
Not used |
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| mvic |
| Posted: Tue Feb 21, 2006 1:31 am Post subject: |
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Jedi
Joined: 09 Mar 2004
Posts: 2080
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| Sorry, forgot to ask this before. Are there any .FDC files in /var/mqm/errors from the time the errors occurred? |
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| sido |
| Posted: Tue Feb 21, 2006 1:38 am Post subject: |
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Novice
Joined: 02 Feb 2004
Posts: 23
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| .FDC files are not found in /var/mqm/errors folder after that error occured.. |
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| wschutz |
| Posted: Tue Feb 21, 2006 3:08 am Post subject: |
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Jedi Knight
Joined: 02 Jun 2005
Posts: 3316
Location: IBM (retired)
|
and to ask the obvious...any relevant entries in AMQERR01.LOG?
_________________
-wayne |
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| sido |
| Posted: Tue Feb 21, 2006 4:46 am Post subject: |
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Novice
Joined: 02 Feb 2004
Posts: 23
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| Yes that AMQERRO.log says max channels reached.. currently it is set to 500. Can i increase that MAXCHANNELS value.. or is there anything i have to do with the code.. |
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| mvic |
| Posted: Tue Feb 21, 2006 5:35 am Post subject: |
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Jedi
Joined: 09 Mar 2004
Posts: 2080
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| sido |
| Posted: Tue Feb 21, 2006 5:49 am Post subject: |
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Novice
Joined: 02 Feb 2004
Posts: 23
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Hi,
The current setting is 500 for MaxChannels and no entry for MaxActiveChannels. Wanted to know what is the criteria to determine the maximum value this can be changed to or this could be safely set to 1000. |
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| mvic |
| Posted: Tue Feb 21, 2006 6:18 am Post subject: |
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Jedi
Joined: 09 Mar 2004
Posts: 2080
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| sido wrote: |
| Wanted to know what is the criteria to determine the maximum value this can be changed to or this could be safely set to 1000. |
Good question, but this is really something to address with your application owners and network administrators. I would wonder why so many channels are running - do you really want 500 open network connections at once? Do you really want 1000? Could it be that these large numbers indicate a problem somewhere? These are questions to be worked through in your specific environment. It is impossible to offer specific advice "from a distance", sorry. |
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| PeterPotkay |
| Posted: Tue Feb 21, 2006 6:30 am Post subject: |
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Poobah
Joined: 15 May 2001
Posts: 7722
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if you have an app that's looping, not closing its connections, then it doesn't matter if you set max channels to 500, 1000 or 10,000.
_________________
Peter Potkay
Keep Calm and MQ On |
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| sido |
| Posted: Wed Feb 22, 2006 12:03 am Post subject: |
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Novice
Joined: 02 Feb 2004
Posts: 23
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Just double-checked the code.
We are closing all Queue and Queue Manager connections after use.
IS there something else I am missing?
What happens to broken channel connections? How are these closed? |
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| sido |
| Posted: Wed Feb 22, 2006 2:29 am Post subject: |
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Novice
Joined: 02 Feb 2004
Posts: 23
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checked the link. It just explains what the setting is for and the default which is 100. I already know this. Looking for some paper that explains more than this..
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| mvic |
| Posted: Wed Feb 22, 2006 3:15 am Post subject: |
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Jedi
Joined: 09 Mar 2004
Posts: 2080
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| sido |
| Posted: Wed Feb 22, 2006 3:57 am Post subject: |
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Novice
Joined: 02 Feb 2004
Posts: 23
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Hi mvic,
Thanks for the article...it did help. However, saw a line in the second link that raises some doubts!
>>>>> This attribute is supported on z/OS(R) only. |
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