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https://issues.apache.org/jira/browse/YARN-2285?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14063710#comment-14063710
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Sunil G commented on YARN-2285:
-------------------------------

I also got 106% in root queue with user-factor configured as 2. I observed 
reservation was happening in my scenario (2 nodes with 8GB). There were some 
preemption happened also in my test case, I will try collect logs share the 
same. Also will try without preemption as Vinod mentioned.

> Preemption can cause capacity scheduler to show 5,000% queue capacity.
> ----------------------------------------------------------------------
>
>                 Key: YARN-2285
>                 URL: https://issues.apache.org/jira/browse/YARN-2285
>             Project: Hadoop YARN
>          Issue Type: Improvement
>          Components: capacityscheduler
>    Affects Versions: 2.5.0
>         Environment: Turn on CS Preemption.
>            Reporter: Tassapol Athiapinya
>            Assignee: Wangda Tan
>            Priority: Minor
>         Attachments: preemption_5000_percent.png
>
>
> I configure queue A, B to have 1%, 99% capacity respectively. There is no max 
> capacity for each queue. Set high user limit factor.
> Submit app 1 to queue A. AM container takes 50% of cluster memory. Task 
> containers take another 50%. Submit app 2 to queue B. Preempt task containers 
> of app 1 out. Turns out capacity of queue B increases to 99% but queue A has 
> 5000% used.



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