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https://issues.apache.org/jira/browse/CASSANDRA-12758?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15590260#comment-15590260
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Michael Shuler commented on CASSANDRA-12758:
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[~rha] the 2.1 patch did not merge cleanly to the cassandra-2.2 branch, and the
conflicts were larger than just a couple lines, so I did not have time tonight
to look through the conflicts. I also tried a straight patch with your 2.1
version on cassandra-2.2 and get the same sort of hunk failure. Perhaps you
could look at that merge and help work this out - looks like it may need a
different patch for 2.2, which is common.
Since the patches do apply cleanly to cassandra-2.1 and cassandra-3.X,
respectively, I went ahead and pushed 12758-2.1 and 12759-3.X branches and
started test jobs, so we can see if there are any regressions. Even a seemingly
small metrics addition may cause failures in metrics tests, so let's do the
needful with a proper review.
http://cassci.datastax.com/view/Dev/view/mshuler/job/mshuler-12758-2.1-testall/
http://cassci.datastax.com/view/Dev/view/mshuler/job/mshuler-12758-2.1-dtest/
http://cassci.datastax.com/view/Dev/view/mshuler/job/mshuler-12758-3.X-testall/
http://cassci.datastax.com/view/Dev/view/mshuler/job/mshuler-12758-3.X-dtest/
> Expose tasks queue length via JMX
> ---------------------------------
>
> Key: CASSANDRA-12758
> URL: https://issues.apache.org/jira/browse/CASSANDRA-12758
> Project: Cassandra
> Issue Type: Improvement
> Reporter: Romain Hardouin
> Priority: Minor
> Fix For: 2.2.x, 3.0.x, 3.x, 4.x
>
> Attachments: 0001-Add-MBean-to-monitor-max-queued-tasks_2.1.patch,
> 0001-Add-MBean-to-monitor-max-queued-tasks_trunk.patch
>
>
> CASSANDRA-11363 introduced {{cassandra.max_queued_native_transport_requests}}
> to set the NTR queue length.
> Currently Cassandra lacks of a JMX Mbean which exposes this value which would
> allow to:
>
> 1. Be sure this value has been set
> 2. Plot this value in a monitoring application to make correlations with
> other graphs when we make changes
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