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qstatus not showing connections but messages getting cleared |
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narayanarvr |
Posted: Fri Feb 03, 2023 8:07 am Post subject: qstatus not showing connections but messages getting cleared |
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Voyager
Joined: 09 Oct 2012 Posts: 84
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Hi All,
Many thanks in advance, I am having a strange issue, when I check my qstatus no application is showing connected, and open input count also showing zero, but messages are getting cleared from this queue, there is no clue which app is clearing messages?
I am using MQ9.1.
Thanks. |
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bruce2359 |
Posted: Fri Feb 03, 2023 10:49 am Post subject: |
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Poobah
Joined: 05 Jan 2008 Posts: 9442 Location: US: west coast, almost. Otherwise, enroute.
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Messages may be expiring. If the queue is a transmission queue, messages may have been sent to other qmgr.
If messages were non-persistent, qmgr restart would have purged them.
Tell us more. Only this one queue? What queue? What is it used for? _________________ I like deadlines. I like to wave as they pass by.
ב''ה
Lex Orandi, Lex Credendi, Lex Vivendi. As we Worship, So we Believe, So we Live. |
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Andyh |
Posted: Fri Feb 03, 2023 1:50 pm Post subject: |
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Master
Joined: 29 Jul 2010 Posts: 239
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DIS QSTATUS shows the status at the instant the command is issued and hence if the application was only briefly connected would typically show no current connections or open handles.
LGETTIME would show when the last MQGET retrieved a message and could be used to show if messages are being consumed or are expiring.
Similarly, the queue level stats for the queue in question could be used to see how the messages are being consumed.
It's often interesting to look at the ratio of the different MQI calls in queue manager scope stats to get a broad idea of application efficiency. For example, the number of MQCONN and MQOPEN calls compared to the number of messages consumed. |
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bruce2359 |
Posted: Sat Feb 04, 2023 12:27 pm Post subject: |
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Poobah
Joined: 05 Jan 2008 Posts: 9442 Location: US: west coast, almost. Otherwise, enroute.
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More basic questions:
Is this a new behavior? Is this a new queue? A new application? Is this a recently modified application? _________________ I like deadlines. I like to wave as they pass by.
ב''ה
Lex Orandi, Lex Credendi, Lex Vivendi. As we Worship, So we Believe, So we Live. |
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exerk |
Posted: Sun Feb 05, 2023 9:59 am Post subject: |
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Jedi Council
Joined: 02 Nov 2006 Posts: 6339
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bruce2359 wrote: |
...If messages were non-persistent, qmgr restart would have purged them... |
Depending on NPMCLASS (and other factors) of course... _________________ 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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gbaddeley |
Posted: Sun Feb 05, 2023 4:27 pm Post subject: Re: qstatus not showing connections but messages getting cle |
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Jedi Knight
Joined: 25 Mar 2003 Posts: 2527 Location: Melbourne, Australia
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narayanarvr wrote: |
Hi All,
Many thanks in advance, I am having a strange issue, when I check my qstatus no application is showing connected, and open input count also showing zero, but messages are getting cleared from this queue, there is no clue which app is clearing messages?
I am using MQ9.1.
Thanks. |
You could ask the team that supports the application. If you are feeling lucky, you could GET DISABLE the queue and wait for someone to complain.
Look at the queue depth. If it drops to zero or near zero on a regular basis (eg. every 10 mins), it is probably an app that runs on a schedule.
Also, check if there are any trigger attributes set on the queue. _________________ Glenn |
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narayanarvr |
Posted: Sun Feb 05, 2023 10:45 pm Post subject: qstatus not showing connections but messages getting cleared |
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Voyager
Joined: 09 Oct 2012 Posts: 84
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Hi All,
Many thanks for your time in replying, this is new application, and queue is a local queue, I don't have direct access to MQ server to do more analysis, this is not transmission queue, for this queue open input count and open output count shows always zero, but messages are consumed, I will also check other properties like NPMClass, message expiry |
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bruce2359 |
Posted: Mon Feb 06, 2023 7:00 am Post subject: |
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Poobah
Joined: 05 Jan 2008 Posts: 9442 Location: US: west coast, almost. Otherwise, enroute.
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Display QSTATUS will only show currently connected apps, not apps recently connected. An app can connect, MQGET message(s) and disconnect in micro- or nanoseconds.
Consider enabling queue statistics and accounting to determine which apps are accessing the queue. _________________ I like deadlines. I like to wave as they pass by.
ב''ה
Lex Orandi, Lex Credendi, Lex Vivendi. As we Worship, So we Believe, So we Live. |
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