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https://issues.apache.org/jira/browse/YARN-2313?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14066091#comment-14066091
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Hadoop QA commented on YARN-2313:
---------------------------------
{color:red}-1 overall{color}. Here are the results of testing the latest
attachment
http://issues.apache.org/jira/secure/attachment/12656445/YARN-2313.3.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}. 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-api
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager:
org.apache.hadoop.yarn.server.resourcemanager.webapp.TestRMWebServices
org.apache.hadoop.yarn.server.resourcemanager.applicationsmanager.TestAMRestart
org.apache.hadoop.yarn.server.resourcemanager.webapp.TestRMWebServicesCapacitySched
org.apache.hadoop.yarn.server.resourcemanager.webapp.TestRMWebServicesDelegationTokens
org.apache.hadoop.yarn.server.resourcemanager.webapp.TestRMWebServicesAppsModification
org.apache.hadoop.yarn.server.resourcemanager.webapp.TestRMWebServicesNodes
org.apache.hadoop.yarn.server.resourcemanager.webapp.TestRMWebServicesApps
org.apache.hadoop.yarn.server.resourcemanager.webapp.TestRMWebServicesFairScheduler
{color:green}+1 contrib tests{color}. The patch passed contrib unit tests.
Test results:
https://builds.apache.org/job/PreCommit-YARN-Build/4356//testReport/
Console output: https://builds.apache.org/job/PreCommit-YARN-Build/4356//console
This message is automatically generated.
> Livelock can occur on FairScheduler when there are lots entry in queue
> ----------------------------------------------------------------------
>
> Key: YARN-2313
> URL: https://issues.apache.org/jira/browse/YARN-2313
> Project: Hadoop YARN
> Issue Type: Bug
> Components: fairscheduler
> Affects Versions: 2.4.1
> Reporter: Tsuyoshi OZAWA
> Assignee: Tsuyoshi OZAWA
> Attachments: YARN-2313.1.patch, YARN-2313.2.patch, YARN-2313.3.patch,
> rm-stack-trace.txt
>
>
> Observed livelock on FairScheduler when there are lots entry in queue. After
> my investigating code, following case can occur:
> 1. {{update()}} called by UpdateThread takes longer times than
> UPDATE_INTERVAL(500ms) if there are lots queue.
> 2. UpdateThread goes busy loop.
> 3. Other threads(AllocationFileReloader,
> ResourceManager$SchedulerEventDispatcher) can wait forever.
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