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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-2933) Capacity Scheduler preemption policy should only consider capacity without labels temporarily
Date Tue, 06 Jan 2015 23:40:35 GMT

    [ https://issues.apache.org/jira/browse/YARN-2933?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14266981#comment-14266981
] 

Hadoop QA commented on YARN-2933:
---------------------------------

{color:red}-1 overall{color}.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12690428/YARN-2933-4.patch
  against trunk revision dd57c20.

    {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/6257//testReport/
Findbugs warnings: https://builds.apache.org/job/PreCommit-YARN-Build/6257//artifact/patchprocess/newPatchFindbugsWarningshadoop-yarn-server-resourcemanager.html
Console output: https://builds.apache.org/job/PreCommit-YARN-Build/6257//console

This message is automatically generated.

> Capacity Scheduler preemption policy should only consider capacity without labels temporarily
> ---------------------------------------------------------------------------------------------
>
>                 Key: YARN-2933
>                 URL: https://issues.apache.org/jira/browse/YARN-2933
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: capacityscheduler
>            Reporter: Wangda Tan
>            Assignee: Mayank Bansal
>         Attachments: YARN-2933-1.patch, YARN-2933-2.patch, YARN-2933-3.patch, YARN-2933-4.patch
>
>
> Currently, we have capacity enforcement on each queue for each label in CapacityScheduler,
but we don't have preemption policy to support that. YARN-2498 is targeting to support preemption
respect node labels, but we have some gaps in code base, like queues/FiCaScheduler should
be able to get usedResource/pendingResource, etc. by label. These items potentially need to
refactor CS which we need spend some time carefully think about.
> For now, what immediately we can do is allow calculate ideal_allocation and preempt containers
only for resources on nodes without labels, to avoid regression like: A cluster has some nodes
with labels and some not, assume queueA isn't satisfied for resource without label, but for
now, preemption policy may preempt resource from nodes with labels for queueA, that is not
correct.
> Again, it is just a short-term enhancement, YARN-2498 will consider preemption respecting
node-labels for Capacity Scheduler which is our final target. 



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