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https://issues.apache.org/jira/browse/YARN-335?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13551582#comment-13551582
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Hadoop QA commented on YARN-335:
--------------------------------
{color:green}+1 overall{color}. Here are the results of testing the latest
attachment
http://issues.apache.org/jira/secure/attachment/12564498/YARN-335.patch
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}. The javadoc tool did not generate any
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/339//testReport/
Console output: https://builds.apache.org/job/PreCommit-YARN-Build/339//console
This message is automatically generated.
> Fair scheduler doesn't check whether rack needs containers before assigning
> to node
> -----------------------------------------------------------------------------------
>
> Key: YARN-335
> URL: https://issues.apache.org/jira/browse/YARN-335
> Project: Hadoop YARN
> Issue Type: Bug
> Components: scheduler
> Affects Versions: 2.0.2-alpha
> Reporter: Sandy Ryza
> Assignee: Sandy Ryza
> Attachments: YARN-335.patch
>
>
> If an application has an outstanding request on a node, the fair scheduler
> may try to place a container on that node without checking whether that
> node's rack needs any containers. If the rack doesn't need any containers,
> none should be scheduled on the node.
> This can cause an NPE in the fair scheduler.
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