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https://issues.apache.org/jira/browse/STORM-1593?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15175821#comment-15175821
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Robert Joseph Evans commented on STORM-1593:
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Just so you know there was an old pull request to add in queue_length.
https://github.com/apache/storm/pull/236
You might want to look at it as a starting point, but it is out of date and
[~knusbaum] hasn't found the time yet to upmerge it :).
> Nimbus indicator for when a Topology finished processing all tuples
> -------------------------------------------------------------------
>
> Key: STORM-1593
> URL: https://issues.apache.org/jira/browse/STORM-1593
> Project: Apache Storm
> Issue Type: New Feature
> Components: storm-core
> Reporter: Michael Schonfeld
> Priority: Minor
>
> Every time we want to update topologies, we routinely find ourselves waiting
> aimlessly for topologies to "fully finish" processing. We never truly know
> when a topology is actually still processing tuples, and when it's really
> done... Unless of course we wait for a full 10m window showing zeros in
> Nimbus's topology stats table.
> I think it'd be beneficial to add some sort of a "Green" indicator in Nimbus,
> showing when a deactivated topology has ~0 tuples ringing through it. Would
> using the queue send/rcv population metric be correct for this?
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