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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-1957) ProportionalCapacitPreemptionPolicy handling of corner cases...
Date Tue, 29 Apr 2014 03:32:15 GMT

    [ https://issues.apache.org/jira/browse/YARN-1957?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13983943#comment-13983943

Hadoop QA commented on YARN-1957:

{color:green}+1 overall{color}.  Here are the results of testing the latest attachment 
  against trunk revision .

    {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:green}+1 findbugs{color}.  The patch does not introduce any new Findbugs (version
1.3.9) 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.

    {color:green}+1 contrib tests{color}.  The patch passed contrib unit tests.

Test results: https://builds.apache.org/job/PreCommit-YARN-Build/3650//testReport/
Console output: https://builds.apache.org/job/PreCommit-YARN-Build/3650//console

This message is automatically generated.

> ProportionalCapacitPreemptionPolicy handling of corner cases...
> ---------------------------------------------------------------
>                 Key: YARN-1957
>                 URL: https://issues.apache.org/jira/browse/YARN-1957
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: resourcemanager
>    Affects Versions: 2.4.0
>            Reporter: Carlo Curino
>            Assignee: Carlo Curino
>              Labels: capacity-scheduler, preemption
>         Attachments: YARN-1957.patch, YARN-1957.patch, YARN-1957_test.patch
> The current version of ProportionalCapacityPreemptionPolicy should be improved to deal
with the following two scenarios:
> 1) when rebalancing over-capacity allocations, it potentially preempts without considering
the maxCapacity constraints of a queue (i.e., preempting possibly more than strictly necessary)
> 2) a zero capacity queue is preempted even if there is no demand (coherent with old use
of zero-capacity to disabled queues)
> The proposed patch fixes both issues, and introduce few new test cases.

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