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MQSeries.net Forum IndexGeneral IBM MQ SupportStopping listener - effect on existing connections

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zpat
PostPosted: Tue Jun 02, 2020 8:53 am Post subject: Stopping listener - effect on existing connections Reply with quote

Jedi Council

Joined: 19 May 2001
Posts: 5702
Location: UK

Is it correct to say that stopping a listener will not cause any established channel connections to drop, but just prevent new ones on that port?

(MQ 7.1 on z/OS using a Group listener)
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Well, I don't think there is any question about it. It can only be attributable to human error. This sort of thing has cropped up before, and it has always been due to human error.
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Vitor
PostPosted: Tue Jun 02, 2020 9:19 am Post subject: Re: Stopping listener - effect on existing connections Reply with quote

Grand High Poobah

Joined: 11 Nov 2005
Posts: 25995
Location: Texas, USA

zpat wrote:
Is it correct to say that stopping a listener will not cause any established channel connections to drop, but just prevent new ones on that port?

(MQ 7.1 on z/OS using a Group listener)



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Honesty is the best policy.
Insanity is the best defence.
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zpat
PostPosted: Tue Jun 02, 2020 12:48 pm Post subject: Reply with quote

Jedi Council

Joined: 19 May 2001
Posts: 5702
Location: UK

Excellent. Thanks.
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Well, I don't think there is any question about it. It can only be attributable to human error. This sort of thing has cropped up before, and it has always been due to human error.
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gbaddeley
PostPosted: Tue Jun 02, 2020 3:42 pm Post subject: Re: Stopping listener - effect on existing connections Reply with quote

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Joined: 25 Mar 2003
Posts: 2124
Location: Melbourne, Australia

zpat wrote:
Is it correct to say that stopping a listener will not cause any established channel connections to drop, but just prevent new ones on that port? (MQ 7.1 on z/OS using a Group listener)


Yes, but strictly speaking, after a TCP socket connection has been established, the end points negotiate a separate port, and there is no further reference to the listener port. ie. Even blocking the port in a firewall will not affect established connections or the ability to stop them.
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Glenn
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