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https://issues.apache.org/jira/browse/YARN-5889?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15854640#comment-15854640
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Eric Payne commented on YARN-5889:
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[~sunilg], Thanks for running those manual tests. Those were the same tests
that I was running.
I discovered that this was not something introduced by this patch, but it
happens in trunk as well. Also, I discovered that it doesn't happen for a
cluster with 1, 2, or 3 nodemanagers, but when the 4th nodemanager is added, it
starts happening.
At any rate, the good news is that this is not a problem with your patch. I
have a couple of more things I want to check out on the patch before my review
is complete. I'll get back to you soon.
> Improve user-limit calculation in capacity scheduler
> ----------------------------------------------------
>
> Key: YARN-5889
> URL: https://issues.apache.org/jira/browse/YARN-5889
> Project: Hadoop YARN
> Issue Type: Bug
> Components: capacity scheduler
> Reporter: Sunil G
> Assignee: Sunil G
> Attachments: YARN-5889.0001.patch,
> YARN-5889.0001.suggested.patchnotes, YARN-5889.0002.patch,
> YARN-5889.0003.patch, YARN-5889.0004.patch, YARN-5889.0005.patch,
> YARN-5889.0006.patch, YARN-5889.0007.patch, YARN-5889.0008.patch,
> YARN-5889.0009.patch, YARN-5889.0010.patch, YARN-5889.v0.patch,
> YARN-5889.v1.patch, YARN-5889.v2.patch
>
>
> Currently user-limit is computed during every heartbeat allocation cycle with
> a write lock. To improve performance, this tickets is focussing on moving
> user-limit calculation out of heartbeat allocation flow.
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