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https://issues.apache.org/jira/browse/YARN-3487?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14495195#comment-14495195
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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/12725412/YARN-3487.002.patch
against trunk revision fddd552.
{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.TestApplicationCleanup
org.apache.hadoop.yarn.server.resourcemanager.webapp.TestRMWebServicesApps
org.apache.hadoop.yarn.server.resourcemanager.TestApplicationMasterLauncher
org.apache.hadoop.yarn.server.resourcemanager.TestKillApplicationWithRMHA
org.apache.hadoop.yarn.server.resourcemanager.TestApplicationMasterService
org.apache.hadoop.yarn.server.resourcemanager.webapp.TestRMWebServicesDelegationTokens
org.apache.hadoop.yarn.server.resourcemanager.TestClientRMTokens
Test results:
https://builds.apache.org/job/PreCommit-YARN-Build/7338//testReport/
Console output: https://builds.apache.org/job/PreCommit-YARN-Build/7338//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: Bug
> Components: capacityscheduler
> Affects Versions: 2.6.0
> Reporter: Jason Lowe
> Assignee: Jason Lowe
> Priority: Critical
> Attachments: YARN-3487.001.patch, YARN-3487.002.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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