[
https://issues.apache.org/jira/browse/YARN-2313?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14071816#comment-14071816
]
Hudson commented on YARN-2313:
------------------------------
SUCCESS: Integrated in Hadoop-Mapreduce-trunk #1840 (See
[https://builds.apache.org/job/Hadoop-Mapreduce-trunk/1840/])
YARN-2313. Livelock can occur in FairScheduler when there are lots of running
apps (Tsuyoshi Ozawa via Sandy Ryza) (sandy:
http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1612769)
* /hadoop/common/trunk/hadoop-yarn-project/CHANGES.txt
*
/hadoop/common/trunk/hadoop-yarn-project/hadoop-yarn/dev-support/findbugs-exclude.xml
*
/hadoop/common/trunk/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/fair/FairScheduler.java
*
/hadoop/common/trunk/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/fair/FairSchedulerConfiguration.java
*
/hadoop/common/trunk/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/fair/TestFairSchedulerPreemption.java
*
/hadoop/common/trunk/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-site/src/site/apt/FairScheduler.apt.vm
> Livelock can occur in FairScheduler when there are lots of running apps
> -----------------------------------------------------------------------
>
> 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
> Fix For: 2.6.0
>
> Attachments: YARN-2313.1.patch, YARN-2313.2.patch, YARN-2313.3.patch,
> YARN-2313.4.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.
--
This message was sent by Atlassian JIRA
(v6.2#6252)
