[jira] [Commented] (YARN-3405) FairScheduler's preemption cannot happen between sibling in some case

["Hadoop QA (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/YARN-3405?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14742798#comment-14742798 ] 

Hadoop QA commented on YARN-3405:
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| (x) *{color:red}-1 overall{color}* |
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|| Vote || Subsystem || Runtime || Comment ||
| {color:red}-1{color} | patch |   0m  0s | The patch command could not apply the patch during dryrun. |
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|| Subsystem || Report/Notes ||
| Patch URL | http://issues.apache.org/jira/secure/attachment/12727554/YARN-3405.02.patch |
| Optional Tests | javadoc javac unit findbugs checkstyle |
| git revision | trunk / 332b520 |
| Console output | https://builds.apache.org/job/PreCommit-YARN-Build/9109/console |


This message was automatically generated.

> FairScheduler's preemption cannot happen between sibling in some case
> ---------------------------------------------------------------------
>
>                 Key: YARN-3405
>                 URL: https://issues.apache.org/jira/browse/YARN-3405
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: fairscheduler
>    Affects Versions: 2.7.0
>            Reporter: Peng Zhang
>            Assignee: Peng Zhang
>            Priority: Critical
>              Labels: BB2015-05-TBR
>         Attachments: YARN-3405.01.patch, YARN-3405.02.patch
>
>
> Queue hierarchy described as below:
> {noformat}
>                   root
>                /         \
>        queue-1          queue-2       
>           /      \
> queue-1-1     queue-1-2
> {noformat}
> Assume cluster resource is 100
> # queue-1-1 and queue-2 has app. Each get 50 usage and 50 fairshare. 
> # When queue-1-2 is active, and it cause some new preemption request for fairshare 25.
> # When preemption from root, it has possibility to find preemption candidate is queue-2. If so preemptContainerPreCheck for queue-2 return false because it's equal to its fairshare.
> # Finally queue-1-2 will be waiting for resource release form queue-1-1 itself.
> What I expect here is that queue-1-2 preempt from queue-1-1.



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