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Posted to yarn-issues@hadoop.apache.org by "Alex Rovner (JIRA)" <ji...@apache.org> on 2016/07/26 14:09:21 UTC
[jira] [Commented] (YARN-1724) Race condition in Fair Scheduler
when continuous scheduling is turned on
[ https://issues.apache.org/jira/browse/YARN-1724?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15393844#comment-15393844 ]
Alex Rovner commented on YARN-1724:
-----------------------------------
We are running CDH 5.4.0 and are hitting the same issue. Any advise would be appreciated.
hadoop version
Hadoop 2.6.0-cdh5.4.0
Subversion http://github.com/cloudera/hadoop -r c788a14a5de9ecd968d1e2666e8765c5f018c271
Compiled by jenkins on 2015-04-21T19:18Z
Compiled with protoc 2.5.0
From source with checksum cd78f139c66c13ab5cee96e15a629025
This command was run using /usr/lib/hadoop/hadoop-common-2.6.0-cdh5.4.0.jar
{noformat}
Exception:
2016-07-26 06:48:05,082 ERROR org.apache.hadoop.yarn.YarnUncaughtExceptionHandler: Thread Thread[FairSchedulerContinuousScheduling,5,main] threw an Exception.
java.lang.IllegalArgumentException: Comparison method violates its general contract!
at java.util.TimSort.mergeLo(TimSort.java:747)
at java.util.TimSort.mergeAt(TimSort.java:483)
at java.util.TimSort.mergeForceCollapse(TimSort.java:426)
at java.util.TimSort.sort(TimSort.java:223)
at java.util.TimSort.sort(TimSort.java:173)
at java.util.Arrays.sort(Arrays.java:659)
at java.util.Collections.sort(Collections.java:217)
at org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.FairScheduler.continuousSchedulingAttempt(FairScheduler.java:991)
at org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.FairScheduler$ContinuousSchedulingThread.run(FairScheduler.java:280)
{noformat}
> Race condition in Fair Scheduler when continuous scheduling is turned on
> -------------------------------------------------------------------------
>
> Key: YARN-1724
> URL: https://issues.apache.org/jira/browse/YARN-1724
> Project: Hadoop YARN
> Issue Type: Bug
> Components: scheduler
> Reporter: Sandy Ryza
> Assignee: Sandy Ryza
> Priority: Critical
> Fix For: 2.4.0
>
> Attachments: YARN-1724-1.patch, YARN-1724.patch
>
>
> If nodes resource allocations change during
> Collections.sort(nodeIdList, nodeAvailableResourceComparator);
> we'll hit:
> java.lang.IllegalArgumentException: Comparison method violates its general contract!
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