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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-3487) CapacityScheduler scheduler lock obtained unnecessarily
Date Fri, 17 Apr 2015 23:28:00 GMT

    [ https://issues.apache.org/jira/browse/YARN-3487?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14500891#comment-14500891
] 

Hadoop QA commented on YARN-3487:
---------------------------------

{color:red}-1 overall{color}.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12726214/YARN-3487.003.patch
  against trunk revision d573f09.

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

    {color:red}-1 tests included{color}.  The patch doesn't appear to include any new or modified
tests.
                        Please justify why no new tests are needed for this patch.
                        Also please list what manual steps were performed to verify this patch.

    {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.applicationsmanager.TestAMRestart

Test results: https://builds.apache.org/job/PreCommit-YARN-Build/7387//testReport/
Console output: https://builds.apache.org/job/PreCommit-YARN-Build/7387//console

This message is automatically generated.

> CapacityScheduler scheduler lock obtained unnecessarily
> -------------------------------------------------------
>
>                 Key: YARN-3487
>                 URL: https://issues.apache.org/jira/browse/YARN-3487
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: capacityscheduler
>    Affects Versions: 2.6.0
>            Reporter: Jason Lowe
>            Assignee: Jason Lowe
>            Priority: Critical
>         Attachments: YARN-3487.001.patch, YARN-3487.002.patch, YARN-3487.003.patch
>
>
> Recently saw a significant slowdown of applications on a large cluster, and we noticed
there were a large number of blocked threads on the RM.  Most of the blocked threads were
waiting for the CapacityScheduler lock while calling getQueueInfo.



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