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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-3388) Allocation in LeafQueue could get stuck because DRF calculator isn't well supported when computing user-limit
Date Thu, 02 Apr 2015 21:41:53 GMT

    [ https://issues.apache.org/jira/browse/YARN-3388?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14393493#comment-14393493
] 

Hadoop QA commented on YARN-3388:
---------------------------------

{color:red}-1 overall{color}.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12709050/YARN-3388-v1.patch
  against trunk revision eccb7d4.

    {color:green}+1 @author{color}.  The patch does not contain any @author tags.

    {color:green}+1 tests included{color}.  The patch appears to include 2 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
2.0.3) warnings.

    {color:green}+1 release audit{color}.  The applied patch does not increase the total number
of release audit warnings.

    {color:red}-1 core tests{color}.  The patch failed these unit tests in hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager:

                  org.apache.hadoop.yarn.server.resourcemanager.webapp.TestRMWebServicesAppsModification
                  org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.TestFairScheduler
                  org.apache.hadoop.yarn.server.resourcemanager.webapp.TestRMWebServicesApps
                  org.apache.hadoop.yarn.server.resourcemanager.TestRM

                                      The following test timeouts occurred in hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager:

org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.TestContainerAllocation

Test results: https://builds.apache.org/job/PreCommit-YARN-Build/7201//testReport/
Console output: https://builds.apache.org/job/PreCommit-YARN-Build/7201//console

This message is automatically generated.

> Allocation in LeafQueue could get stuck because DRF calculator isn't well supported when
computing user-limit
> -------------------------------------------------------------------------------------------------------------
>
>                 Key: YARN-3388
>                 URL: https://issues.apache.org/jira/browse/YARN-3388
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: capacityscheduler
>    Affects Versions: 2.6.0
>            Reporter: Nathan Roberts
>            Assignee: Nathan Roberts
>         Attachments: YARN-3388-v0.patch, YARN-3388-v1.patch
>
>
> When there are multiple active users in a queue, it should be possible for those users
to make use of capacity up-to max_capacity (or close). The resources should be fairly distributed
among the active users in the queue. This works pretty well when there is a single resource
being scheduled.   However, when there are multiple resources the situation gets more complex
and the current algorithm tends to get stuck at Capacity. 
> Example illustrated in subsequent comment.



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