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MQSeries.net Forum IndexGeneral IBM MQ SupportSpring JMS listener count dropping

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vicks_mq
PostPosted: Mon May 06, 2019 6:01 pm Post subject: Spring JMS listener count dropping Reply with quote

Disciple

Joined: 03 Oct 2017
Posts: 162

Hi, We have SPRING JMS Listener on our Websphere MQ. after some time of inactivity, the IPPROCS on the queue gets dropped but that count is not increasing even we get the large number of messages coming into Queue.

What configuration am I missing here , which is causing SPRING based listener not to come back up.
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exerk
PostPosted: Tue May 07, 2019 12:30 am Post subject: Reply with quote

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Joined: 02 Nov 2006
Posts: 6109

Are you seeing the channel(s) dropping?
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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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vicks_mq
PostPosted: Tue May 07, 2019 4:09 am Post subject: Reply with quote

Disciple

Joined: 03 Oct 2017
Posts: 162

exerk wrote:
Are you seeing the channel(s) dropping?


Yes that is right both IPPROCS and SVRCONN channel instances are dropping, it went from 30 instances when application started to only 1 in few hours.
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exerk
PostPosted: Tue May 07, 2019 10:12 am Post subject: Reply with quote

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Posts: 6109

vicks_mq wrote:
exerk wrote:
Are you seeing the channel(s) dropping?


Yes that is right both IPPROCS and SVRCONN channel instances are dropping, it went from 30 instances when application started to only 1 in few hours.

Then the application is dropping them deliberately, or the connections are being interrupted and not being re-established by the application.

Are you expecting the application to automatically reconnect to the queue manager? If so, does the application follow the requirements for automatic reconnection for a Java application?
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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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vicks_mq
PostPosted: Wed May 08, 2019 1:55 am Post subject: Reply with quote

Disciple

Joined: 03 Oct 2017
Posts: 162

exerk wrote:
vicks_mq wrote:
exerk wrote:
Are you seeing the channel(s) dropping?


Yes that is right both IPPROCS and SVRCONN channel instances are dropping, it went from 30 instances when application started to only 1 in few hours.

Then the application is dropping them deliberately, or the connections are being interrupted and not being re-established by the application.

Are you expecting the application to automatically reconnect to the queue manager? If so, does the application follow the requirements for automatic reconnection for a Java application?

Expecatation here is when the large number of messages arrive in the queue for application to consume, it should start more instances of channel and have more listeners so that it can consume messages faster. but once the listener drops, the application is not bringing the count backup.
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Vitor
PostPosted: Wed May 08, 2019 5:36 am Post subject: Reply with quote

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Joined: 11 Nov 2005
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vicks_mq wrote:
Expecatation here is when the large number of messages arrive in the queue for application to consume, it should start more instances of channel and have more listeners so that it can consume messages faster. but once the listener drops, the application is not bringing the count backup.


From where are you getting this expectation? What mechanism do you believe will be starting more listeners (which is what will cause an increase in the number of channels)?

Most importantly, what leads you to believe that MQ is the mechanism which will drive the application to
Quote:
start more instances of channel and have more listeners so that it can consume messages faster

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