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MQSeries.net Forum Index » IBM MQ Installation/Configuration Support » Listener not running

Listener not running

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atheek

Posted: Sat Sep 02, 2006 1:03 am Post subject: Listener not running

Partisan

Joined: 01 Jun 2006
Posts: 327
Location: Sydney

Hi folks,

Is it necessary to run the listener to receive messages? I am having 3 queue managers at my local box , QMA, QMB, QMC. My application is connected to QMA. I checked for any listeners for QMA by issuing:

ps -ef | grep runmqlsr, i got the following:

runmqlsr -m QMC

so there is no listener for QMA and QMB. But my application connected to QMA is able to receive messages from the end systems.

Thanks in advance

wschutz

Posted: Sat Sep 02, 2006 2:59 am Post subject:

Jedi Knight

Joined: 02 Jun 2005
Posts: 3316
Location: IBM (retired)

You need a listener, either a tcp listener (aka inetd) or a mq listener (runmqlsr):
http://publib.boulder.ibm.com/infocenter/wmqv6/v6r0/index.jsp?topic=/com.ibm.mq.csqzae.doc/csqzae10101.htm

In MQ, the only ways to get messages into qmgrs is:
(1) via a local program MQPUTting the messages, or
(2) have a MQ channel to the qmgr (which actually is also using MQPUT to put the messages),
(there is an exception for zOS qmgrs called shared queues)....

To run a channel, one end needs a listener... there are channel configurations where the messages are received "in the reverse order", but these configurations are rare:
http://publib.boulder.ibm.com/infocenter/wmqv6/v6r0/index.jsp?topic=/com.ibm.mq.csqzae.doc/chtype.htm
_________________
-wayne

jefflowrey

Posted: Sat Sep 02, 2006 6:49 am Post subject:

Grand Poobah

Joined: 16 Oct 2002
Posts: 19981

So if you have a local program talking to a local queue manager, you don't need channels or a listener for that program to put and get messages.

But if you need remote programs or remote queue managers to talk to that local queue manager, you do need a listener.
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I am *not* the model of the modern major general.

jeevan

Posted: Sat Sep 02, 2006 10:11 am Post subject:

Grand Master

Joined: 12 Nov 2005
Posts: 1432

Jeff wrote

Quote:

So if you have a local program talking to a local queue manager, you don't need channels or a listener for that program to put and get messages.

By saying that areu you referring to binding mode? is that right? Or is there any other method an application can talk to a local queue manager?

PeterPotkay

Posted: Sat Sep 02, 2006 10:22 am Post subject:

Poobah

Joined: 15 May 2001
Posts: 7722

Yes Bindings Mode, which allows you to interact with a QM without going thru the listener. Versus Client Mode, which does require a listener, even if the Client Mode app is running on the same server.

All MQ apps fall into one of these 2 categories, no exceptions.
_________________
Peter Potkay
Keep Calm and MQ On

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