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MQSeries.net Forum Index » General Discussion » Max out connections to the QMGR

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maxy_14in
PostPosted: Fri Mar 19, 2010 6:20 pm    Post subject: Max out connections to the QMGR Reply with quote

Apprentice

Joined: 07 Nov 2008
Posts: 43

The QMGR was configured to accept amx of 250 incoming connections requests from the client. The max number of connections i.e., 250 reached and now the QMGR is simply refusing more connections to it. MQ Explorer dsnt work as it dsnt gets connected, we figured it first as the QMGR was down but, QMGR was RUNNING when checked through cmd prompt.
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fjb_saper
PostPosted: Fri Mar 19, 2010 6:54 pm    Post subject: Re: Max out connections to the QMGR Reply with quote

Grand High Poobah

Joined: 18 Nov 2003
Posts: 20756
Location: LI,NY

maxy_14in wrote:
The QMGR was configured to accept amx of 250 incoming connections requests from the client. The max number of connections i.e., 250 reached and now the QMGR is simply refusing more connections to it. MQ Explorer dsnt work as it dsnt gets connected, we figured it first as the QMGR was down but, QMGR was RUNNING when checked through cmd prompt.


Go onto the box and use runmqsc
With redirecting the output of dis chs(*) where (status eq running) you should be getting a list of active channels. You can grep that by "CHANNEL", sort it and number the lines. That should give you which channel has the most instances... My guess is the result will be self explanatory... You can force shut it down using runmqsc...

What you will need to do is use a to hit your developers with for not closing the channel. If you truly do need more channels.... (quite possible) do an evaluation of how many are needed and double that amount for the qm.ini.

Have fun
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exerk
PostPosted: Sat Mar 20, 2010 2:07 am    Post subject: Reply with quote

Jedi Council

Joined: 02 Nov 2006
Posts: 6339

And use a discrete SVRCONN per application because that way you can shut down the offending channel without impacting the other client applications, i.e. 10 apps, 10 SVRCONN's.
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It's puzzling, I don't think I've ever seen anything quite like this before...and it's hard to soar like an eagle when you're surrounded by turkeys.
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fjb_saper
PostPosted: Sat Mar 20, 2010 7:22 pm    Post subject: Reply with quote

Grand High Poobah

Joined: 18 Nov 2003
Posts: 20756
Location: LI,NY

very strongly!
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gbaddeley
PostPosted: Sun Mar 21, 2010 4:23 pm    Post subject: Reply with quote

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Joined: 25 Mar 2003
Posts: 2538
Location: Melbourne, Australia

exerk wrote:
And use a discrete SVRCONN per application because that way you can shut down the offending channel without impacting the other client applications, i.e. 10 apps, 10 SVRCONN's.


Plus in MQ v7 you can limit the number of connections on each SVRCONN so that no single application can hog the maxchannels and block other apps from connecting and other distributed and cluster channels from starting.
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shashivarungupta
PostPosted: Mon Mar 22, 2010 12:58 pm    Post subject: Re: Max out connections to the QMGR Reply with quote

Grand Master

Joined: 24 Feb 2009
Posts: 1343
Location: Floating in space on a round rock.

maxy_14in wrote:
The QMGR was configured to accept amx of 250 incoming connections requests from the client. The max number of connections i.e., 250 reached and now the QMGR is simply refusing more connections to it.

By the way... the solutions that you got from seniors are very true. and if you would have checked the previous posts of similar kind of issue then you would found comments and suggestions from PeterPotkay, Roger, Vitor, exerk, fjb_saper, me and lots others.

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maxy_14in
PostPosted: Tue Mar 23, 2010 3:38 am    Post subject: Reply with quote

Apprentice

Joined: 07 Nov 2008
Posts: 43

thank you very for one and all ...

how to identify the connections to the QMGR ?
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exerk
PostPosted: Tue Mar 23, 2010 3:48 am    Post subject: Reply with quote

Jedi Council

Joined: 02 Nov 2006
Posts: 6339

maxy_14in wrote:
...how to identify the connections to the QMGR ?


Once you can connect MQExplorer, right click on the queue manager and select Application Connections... and all will be revealed
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It's puzzling, I don't think I've ever seen anything quite like this before...and it's hard to soar like an eagle when you're surrounded by turkeys.
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shashivarungupta
PostPosted: Tue Mar 23, 2010 11:14 am    Post subject: Reply with quote

Grand Master

Joined: 24 Feb 2009
Posts: 1343
Location: Floating in space on a round rock.

maxy_14in wrote:
how to identify the connections to the QMGR ?

I am absolutely agree with exerk.
You can also see by right clicking Qmgr > Status > General : Connection Count, is the parameter you can find it here.
but afa 'Threads' are concerned.. you can check the 'Application Connections' (look at the App Type while looking at the Thread).

Thanks.
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maxy_14in
PostPosted: Wed Mar 24, 2010 3:39 am    Post subject: Reply with quote

Apprentice

Joined: 07 Nov 2008
Posts: 43

Thank you gurus ...
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maxy_14in
PostPosted: Thu Mar 25, 2010 3:38 am    Post subject: Reply with quote

Apprentice

Joined: 07 Nov 2008
Posts: 43

how abt using the 'lsof -i' command ?
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