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| thebeach |
 Posted: Thu Sep 21, 2006 12:53 am Post subject: Solaris listener process not accepting new connections |
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Apprentice
Joined: 30 Mar 2004
Posts: 47
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Can anyone assist...
The issue:
Frequently(once daily at least), our default listener port 1414 refuses to accept new connections, ie clients time out with a 2059 error.
Connections on other listeners to the same QM are fine.
netstat etc has not revealed any particular TCP issues, we are not hitting the maxchannel limit either.
Killing the listener process and restarting resolves the issue, but is obviously very dirty.
Running Solaris, with WMQ 5.3, CSD12.
Im considering backing out CSD12.
Thanks in advance!!!! |
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| wschutz |
| Posted: Thu Sep 21, 2006 1:43 am Post subject: |
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Jedi Knight
Joined: 02 Jun 2005
Posts: 3316
Location: IBM (retired)
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So this only started after CSD12? ... and nothing interesting in AMQERR01.LOG and no FDC's?
Can you still telnet to 1414 after this happens?
_________________
-wayne |
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| bbburson |
| Posted: Thu Sep 21, 2006 5:36 am Post subject: |
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Partisan
Joined: 06 Jan 2004
Posts: 378
Location: Nowhere near a queue manager
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| Are you hitting MaxChannels or MaxActiveChannels limits? The default is 100, can be changed in /var/mqm/qmgrs/.../qm.ini. |
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| thebeach |
| Posted: Thu Sep 21, 2006 5:29 pm Post subject: |
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Apprentice
Joined: 30 Mar 2004
Posts: 47
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We have maxchannels set very high, we've not reached the limit.
Telnet to the port times-out too.
ERRLOG show nothing unusual, netstat either very stange.
I don't think it started immediately after CSD12, but im rolling back anyway. |
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| jefflowrey |
| Posted: Thu Sep 21, 2006 6:23 pm Post subject: |
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Grand Poobah
Joined: 16 Oct 2002
Posts: 19981
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| thebeach wrote: |
| Telnet to the port times-out too. |
Then it may not be an MQ problem.
_________________
I am *not* the model of the modern major general. |
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| fjb_saper |
| Posted: Fri Sep 22, 2006 2:58 am Post subject: |
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Grand High Poobah
Joined: 18 Nov 2003
Posts: 20756
Location: LI,NY
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What is the size of the TCP/IP queue for the requests to the port?
There is an attribute on the listener that allows you to set this.
Once the size of the TCP/IP queue is reached no other connection is allowed untill the current demand goes below that threshold.
When you are experiencing this problem are a lot of clients trying to connect at the same time? (more like over 100?)
Enjoy 
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MQ & Broker admin |
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