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MQSeries.net Forum IndexGeneral IBM MQ Supportchannel issue

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raz
PostPosted: Mon Jun 30, 2008 8:48 am Post subject: channel issue Reply with quote

Acolyte

Joined: 10 Jul 2007
Posts: 70

I'm seeing the following message in my qmgr error logs very frequently.
MQ6.0.2.1 on Solaris9.

Could anybody help me on this.


06/30/08 13:27:38 - Process(26342.203) User(mqm) Program(amqrmppa)
AMQ9528: User requested closure of channel 'TEST.P'.

EXPLANATION:
The channel is closing because of a request by the user.
ACTION:
None.
----- amqrmssa.c : 2400 -------------------------------------------------------
06/30/08 13:27:38 - Process(26342.203) User(mqm) Program(amqrmppa)
AMQ9001: Channel 'TEST.P' ended normally.

EXPLANATION:
Channel 'TEST.P' ended normally.
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SAFraser
PostPosted: Mon Jun 30, 2008 10:09 am Post subject: Reply with quote

Shaman

Joined: 22 Oct 2003
Posts: 742
Location: Austin, Texas, USA

AFAIK, the only way such a message can be generated by the queue manager is for a human being (or a human-written script) to affirmatively issue a 'stop channel' command.
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raz
PostPosted: Mon Jun 30, 2008 10:29 am Post subject: Reply with quote

Acolyte

Joined: 10 Jul 2007
Posts: 70

Nobody is issuing the stop channel command. Is it is any network issue.

Thanks
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SAFraser
PostPosted: Mon Jun 30, 2008 11:02 am Post subject: Reply with quote

Shaman

Joined: 22 Oct 2003
Posts: 742
Location: Austin, Texas, USA

Nope, a network issue would not generate this error.

Perhaps wiser people than me can jump in.... but I would say that someone (or someone's code) is affirmatively issuing the 'stop channel' command, and are logged in as 'mqm' when it happens.
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sami.stormrage
PostPosted: Mon Jun 30, 2008 12:47 pm Post subject: Reply with quote

Disciple

Joined: 25 Jun 2008
Posts: 186
Location: Bangalore/Singapore

Are there any core dumps or FDC's being created, when the channel stops?
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fjb_saper
PostPosted: Mon Jun 30, 2008 12:57 pm Post subject: Reply with quote

Grand High Poobah

Joined: 18 Nov 2003
Posts: 20119
Location: LI,NY

SAFraser wrote:
Nope, a network issue would not generate this error.

Perhaps wiser people than me can jump in.... but I would say that someone (or someone's code) is affirmatively issuing the 'stop channel' command, and are logged in as 'mqm' when it happens.

SAFraser is right
Quote:
06/30/08 13:27:38 - Process(26342.203) User(mqm) Program(amqrmppa)
AMQ9528: User requested closure of channel 'TEST.P'.

Note this could have happened different ways:
  1. User closed program and corresponding svrconn channel closes (not necessarily user mqm) but in this case I would have expected a message saying the channel is inactive?
  2. pcf message sent to command server
  3. mqsc command (MO72)
  4. runmqsc command

It is essentially an informational message and no action needs to be taken.
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PeterPotkay
PostPosted: Mon Jun 30, 2008 1:27 pm Post subject: Reply with quote

Poobah

Joined: 15 May 2001
Posts: 7573

I occasionally see this error between 2 of my QMs. Always in he middle of the night, almost every night. The SNDR channel reconnects immediately so its not an issue.

I can assure you a user is not stopping this channel in the middle of the night via MQ commands. I suspect it is network related.
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fjb_saper
PostPosted: Mon Jun 30, 2008 6:08 pm Post subject: Reply with quote

Grand High Poobah

Joined: 18 Nov 2003
Posts: 20119
Location: LI,NY

Peter, you're telling us that every night you see
Quote:
AMQ9528: User requested closure of channel XYZ
in your logs?
All the other messages I would look at as being normal... I would expect a different message than AMQ9528 if it is network related....
Maybe another of those things to put on the wishlist...
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PeterPotkay
PostPosted: Tue Jul 01, 2008 4:27 am Post subject: Reply with quote

Poobah

Joined: 15 May 2001
Posts: 7573

It happens only every few days. Last time was 6-27-08.
Its always betwen these 2 QMs. Each QM has lots of connections to lots of other QMs. All MQ 6.0.2.1 and 6.0.2.3


And on the sending side I see:

Event Type: Error
Event Source: WebSphere MQ
Event Category: None
Event ID: 9259
Date: 6/27/2008
Time: 4:56:08 AM
User: N/A
Computer: MyServerName
Description:
Connection timed out from host '123.456.78.90'.

A connection from host '123.456.78.90'over TCP/IP timed out.

Check to see why data was not received in the expected time. Correct the problem. Reconnect the channel, or wait for a retrying channel to reconnect itself.
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Peter Potkay
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raz
PostPosted: Tue Jul 01, 2008 9:07 am Post subject: Reply with quote

Acolyte

Joined: 10 Jul 2007
Posts: 70

I talked to network person they are syaing that they didn't change any settings. Still I'm seeing the error messages.

Thanks
Raz
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KeeferG
PostPosted: Wed Jul 02, 2008 12:42 am Post subject: Reply with quote

Master

Joined: 15 Oct 2004
Posts: 215
Location: Basingstoke, UK

We used to get lots of AMQ9206 and AMQ9208 errors, typically after a channel being used sporadically. We lowered our HBINT interval down to 30 and the problems seems to have gone away. If it is a network issue that you are seeing perhaps adjusting the HBINT to a lower value may help you too.

We are still testing the networks elsewhere to determine the cause of the issue. I hate not knowing why failures occur.
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Using MQ since 1995
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raz
PostPosted: Wed Jul 02, 2008 10:24 am Post subject: Reply with quote

Acolyte

Joined: 10 Jul 2007
Posts: 70

Thanks Keith
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belchman
PostPosted: Fri Aug 29, 2008 8:03 am Post subject: Reply with quote

Partisan

Joined: 31 Mar 2006
Posts: 347
Location: Ohio, USA

We just had it occur in production at 11:20 AM... One of the 2 MQAs is out... unless he stopped the channel, we did not explicitly stop it...

Peter, are you guys using Patrol or is a Firewall on one end of the channel of yours that saw this phenomenon?
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PeterPotkay
PostPosted: Fri Aug 29, 2008 8:23 am Post subject: Reply with quote

Poobah

Joined: 15 May 2001
Posts: 7573

The 2 QMs are inside the firewall so I don't think that's it.

BMC Patrol? Yes, that is deployed here, although to what extent I don't know.
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Peter Potkay
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belchman
PostPosted: Fri Aug 29, 2008 8:28 am Post subject: Reply with quote

Partisan

Joined: 31 Mar 2006
Posts: 347
Location: Ohio, USA

Is Patrol running under mqm auth on you box as is on ours. I know... but monitoring group says BMC requires it... who am I to argue?
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