[
https://issues.apache.org/jira/browse/ARTEMIS-1999?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16563596#comment-16563596
]
ASF GitHub Bot commented on ARTEMIS-1999:
-----------------------------------------
GitHub user franz1981 opened a pull request:
https://github.com/apache/activemq-artemis/pull/2203
ARTEMIS-1999 Broker uses 100% core's CPU time if msg grouping is used
The deliver loop won't give up trying to deliver messages when
back-pressure kicks in (credits and/or TCP) if msg grouping is used and
there are many consumers registered: this change will allow the loop
to exit by instructing the logic that the group consumer is the only
consumer to check.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/franz1981/activemq-artemis ARTEMIS-1999
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/activemq-artemis/pull/2203.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #2203
----
commit a667561066f0f4c2e1c95dbde0e9eb9e16bde7a5
Author: Francesco Nigro <nigro.fra@...>
Date: 2018-07-31T09:16:26Z
ARTEMIS-1999 Broker uses 100% core's CPU time if msg grouping is used
The deliver loop won't give up trying to deliver messages when
back-pressure kicks in (credits and/or TCP) if msg grouping is used and
there are many consumers registered: this change will allow the loop
to exit by instructing the logic that the group consumer is the only
consumer to check.
----
> Broker is using 100% core's CPU time if message grouping is used
> ----------------------------------------------------------------
>
> Key: ARTEMIS-1999
> URL: https://issues.apache.org/jira/browse/ARTEMIS-1999
> Project: ActiveMQ Artemis
> Issue Type: Improvement
> Components: Broker
> Affects Versions: 2.6.2
> Reporter: Francesco Nigro
> Assignee: Francesco Nigro
> Priority: Major
> Fix For: 2.6.3
>
> Attachments: cpu.svg
>
>
> When consuming messages with message grouping set on the broker seem to
> consume excessive amount of CPU time. On 12 core CPU it can be observed that
> one core goes 100% and stays that way as long as there is more than one
> consumer attached to a queue. Once the number of consumers is reduced to 1
> the CPU usage goes to normal. But moment another consumer is attached another
> CPU core goes 100%.
>
--
This message was sent by Atlassian JIRA
(v7.6.3#76005)
