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https://issues.apache.org/jira/browse/YARN-6769?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16079643#comment-16079643
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daemon commented on YARN-6769:
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[~hadoopqa] I am sorry for my break the test, so I fix it and upload a new
patch file.
[~yufeigu] yufei, please help me review the code if you have free time, thanks
a lot.
> Put the no demand queue after the most in FairSharePolicy#compare
> -----------------------------------------------------------------
>
> Key: YARN-6769
> URL: https://issues.apache.org/jira/browse/YARN-6769
> Project: Hadoop YARN
> Issue Type: Bug
> Components: fairscheduler
> Affects Versions: 2.7.2
> Reporter: daemon
> Assignee: daemon
> Priority: Minor
> Fix For: 2.9.0
>
> Attachments: YARN-6769.001.patch, YARN-6769.002.patch
>
>
> When use fairsheduler as RM scheduler, before assign container we will sort
> all queues or applications.
> We will use FairSharePolicy#compare as the comparator， but the comparator is
> not so perfect.
> It have a problem as blow:
> 1. when a queue use resource over minShare(minResources), it will put behind
> the queue whose demand is zeor.
> so it will greater opportunity to get the resource although it do not want.
> It will waste schedule time when assign container
> to queue or application.
> I have fix it, and I will upload the patch to the jira.
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