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| What happens to msgs pubbed to a topic no one subbed to? |
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| issac |
 Posted: Tue Sep 07, 2021 1:48 am Post subject: What happens to msgs pubbed to a topic no one subbed to? |
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Disciple
Joined: 02 Oct 2008
Posts: 158
Location: Shanghai
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Hello, experts
If lots of messages are published to a topic where no subscription exists, what happens to these messages? Will they pile up in any queue? Or negatively impact QMGR performance somehow?
I searched on MQ Knowledge Center, the closest answer is “they won’t be distributed” But I want to learn more on such messages.
Thank you!
Song
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Bazinga! |
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| gbaddeley |
| Posted: Tue Sep 07, 2021 4:28 pm Post subject: |
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Jedi Knight
Joined: 25 Mar 2003
Posts: 2538
Location: Melbourne, Australia
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https://www.ibm.com/docs/en/ibm-mq/9.2?topic=components-publishers-publications
"By default, after a publication is sent to all interested subscribers it is discarded. However, a publisher can specify that a copy of a publication is retained so that it can be sent to future subscribers who register an interest in the topic."
vis. If there are no active subscriptions (durable or non-durable), and its not a "retained" publication, it will be discarded by the queue manager.
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Glenn |
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| hughson |
| Posted: Wed Sep 08, 2021 2:04 am Post subject: |
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Padawan
Joined: 09 May 2013
Posts: 1959
Location: Bay of Plenty, New Zealand
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It is never placed on any queue, so never really exists as a message.
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Morag Hughson @MoragHughson
IBM MQ Technical Education Specialist
Get your IBM MQ training here!
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| matthew1001 |
| Posted: Wed Sep 29, 2021 1:39 am Post subject: |
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Novice
Joined: 09 Jun 2008
Posts: 19
Location: IBM Hursley Labs, Winchester, UK
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