[ 
https://issues.apache.org/jira/browse/YARN-3487?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14500484#comment-14500484
 ] 

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 c6b5203.

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

    {color:green}+1 tests included{color}.  The patch appears to include 4 new 
or modified test files.

      {color:red}-1 javac{color}.  The applied patch generated 1207 javac 
compiler warnings (more than the trunk's current 1181 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.scheduler.capacity.TestCapacitySchedulerQueueACLs
                  
org.apache.hadoop.yarn.server.resourcemanager.webapp.TestRMWebServicesFairScheduler
                  
org.apache.hadoop.yarn.server.resourcemanager.webapp.TestRMWebServicesApps
                  
org.apache.hadoop.yarn.server.resourcemanager.metrics.TestSystemMetricsPublisher
                  
org.apache.hadoop.yarn.server.resourcemanager.webapp.TestRMWebServicesAppsModification
                  
org.apache.hadoop.yarn.server.resourcemanager.webapp.TestRMWebServicesCapacitySched
                  
org.apache.hadoop.yarn.server.resourcemanager.webapp.TestRMWebServices
                  
org.apache.hadoop.yarn.server.resourcemanager.applicationsmanager.TestAMRestart
                  
org.apache.hadoop.yarn.server.resourcemanager.recovery.TestZKRMStateStoreZKClientConnections
                  
org.apache.hadoop.yarn.server.resourcemanager.recovery.TestZKRMStateStore
                  
org.apache.hadoop.yarn.server.resourcemanager.recovery.TestLeveldbRMStateStore
                  
org.apache.hadoop.yarn.server.resourcemanager.recovery.TestZKRMStateStorePerf
                  
org.apache.hadoop.yarn.server.resourcemanager.scheduler.TestSchedulerUtils
                  
org.apache.hadoop.yarn.server.resourcemanager.security.TestClientToAMTokens
                  
org.apache.hadoop.yarn.server.resourcemanager.webapp.TestRMWebServicesDelegationTokens
                  org.apache.hadoop.yarn.server.resourcemanager.TestRMRestart
                  
org.apache.hadoop.yarn.server.resourcemanager.TestSubmitApplicationWithRMHA
                  
org.apache.hadoop.yarn.server.resourcemanager.recovery.TestFSRMStateStore
                  
org.apache.hadoop.yarn.server.resourcemanager.TestAMAuthorization

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

org.apache.hadoop.yarn.server.resourcemanager.TestSubmitApplicationWithRTestTests
org.apache.hadoop.yarn.server.resourcemanager.TestRMRestaTesTests
org.apache.hadoop.yarn.server.resourcemanager.TestAMAuthorizatTests
org.apache.hadoop.yarn.server.resourcemanager.webapp.TestRMWebServicesNodeLabels

Test results: 
https://builds.apache.org/job/PreCommit-YARN-Build/7380//testReport/
Javac warnings: 
https://builds.apache.org/job/PreCommit-YARN-Build/7380//artifact/patchprocess/diffJavacWarnings.txt
Console output: https://builds.apache.org/job/PreCommit-YARN-Build/7380//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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