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https://issues.apache.org/jira/browse/YARN-3405?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14492482#comment-14492482
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Hadoop QA commented on YARN-3405:
---------------------------------
{color:red}-1 overall{color}. Here are the results of testing the latest
attachment
http://issues.apache.org/jira/secure/attachment/12724934/YARN-3405.01.patch
against trunk revision 174d8b3.
{color:green}+1 @author{color}. The patch does not contain any @author
tags.
{color:green}+1 tests included{color}. The patch appears to include 1 new
or modified test files.
{color:green}+1 javac{color}. The applied patch does not increase the
total number of javac compiler warnings.
{color:green}+1 javadoc{color}. There were no new javadoc warning messages.
{color:green}+1 eclipse:eclipse{color}. The patch built with
eclipse:eclipse.
{color:red}-1 findbugs{color}. The patch appears to introduce 1 new
Findbugs (version 2.0.3) warnings.
{color:green}+1 release audit{color}. The applied patch does not increase
the total number of release audit warnings.
{color:green}+1 core tests{color}. The patch passed unit tests in
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager.
Test results:
https://builds.apache.org/job/PreCommit-YARN-Build/7315//testReport/
Findbugs warnings:
https://builds.apache.org/job/PreCommit-YARN-Build/7315//artifact/patchprocess/newPatchFindbugsWarningshadoop-yarn-server-resourcemanager.html
Console output: https://builds.apache.org/job/PreCommit-YARN-Build/7315//console
This message is 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
> Attachments: YARN-3405.01.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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