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Posted to yarn-issues@hadoop.apache.org by "Weiwei Yang (JIRA)" <ji...@apache.org> on 2019/01/04 13:33:00 UTC
[jira] [Commented] (YARN-9173) FairShare calculation broken for
large values after YARN-8833
[ https://issues.apache.org/jira/browse/YARN-9173?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16734135#comment-16734135 ]
Weiwei Yang commented on YARN-9173:
-----------------------------------
Sure, thanks [~wilfreds] for working on this, I will take a look tomorrow.
> FairShare calculation broken for large values after YARN-8833
> -------------------------------------------------------------
>
> Key: YARN-9173
> URL: https://issues.apache.org/jira/browse/YARN-9173
> Project: Hadoop YARN
> Issue Type: Bug
> Components: fairscheduler
> Affects Versions: 3.3.0
> Reporter: Wilfred Spiegelenburg
> Assignee: Wilfred Spiegelenburg
> Priority: Major
> Attachments: YARN-9173.001.patch
>
>
> After the fix for the infinite loop in YARN-8833 we now get the wrong values back for fairshare calculations under certain circumstances. The current implementation works when the total resource is smaller than Integer.MAXVALUE.
> When the total resource goes above that value the number of iterations is not enough to converge to the correct value.
> The new test {{testResourceUsedWithWeightToResourceRatio()}} only checks that the calculation does not hang but does not check the outcome of the calculation.
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