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https://issues.apache.org/jira/browse/YARN-8373?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16971887#comment-16971887
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Wilfred Spiegelenburg commented on YARN-8373:
---------------------------------------------
See my comment:
{quote}
The one inside the scheduler prevents updates of nodes to flow through as much
as possible.
{quote}
There is no guarantee that there will not be a change. The only way we can
prevent all changes is by locking down all nodes in the list which we do not
want. Putting the scheduler lock in place will quiet down things but does not
guarantee it.
The PriorityQueue does not avoid change. It handles the fact that objects can
change while in the list.
> RM Received RMFatalEvent of type CRITICAL_THREAD_CRASH
> -------------------------------------------------------
>
> Key: YARN-8373
> URL: https://issues.apache.org/jira/browse/YARN-8373
> Project: Hadoop YARN
> Issue Type: Bug
> Components: fairscheduler, resourcemanager
> Affects Versions: 2.9.0
> Reporter: Girish Bhat
> Assignee: Wilfred Spiegelenburg
> Priority: Major
> Labels: newbie
> Attachments: YARN-8373.001.patch, YARN-8373.002.patch,
> YARN-8373.003.patch
>
>
>
>
> {noformat}
> sudo -u yarn /usr/local/hadoop/latest/bin/yarn version Hadoop 2.9.0
> Subversion https://git-wip-us.apache.org/repos/asf/hadoop.git -r
> 756ebc8394e473ac25feac05fa493f6d612e6c50 Compiled by arsuresh on
> 2017-11-13T23:15Z Compiled with protoc 2.5.0 From source with checksum
> 0a76a9a32a5257331741f8d5932f183 This command was run using
> /usr/local/hadoop/hadoop-2.9.0/share/hadoop/common/hadoop-common-2.9.0.jar{noformat}
> This is for version 2.9.0
>
> {noformat}
> 2018-05-25 05:53:12,742 ERROR
> org.apache.hadoop.yarn.server.resourcemanager.ResourceManager: Received
> RMFatalEvent of type CRITICAL_THREAD_CRASH, caused by a critical thread, Fai
> rSchedulerContinuousScheduling, that exited unexpectedly:
> java.lang.IllegalArgumentException: Comparison method violates its general
> contract!
> at java.util.TimSort.mergeHi(TimSort.java:899)
> at java.util.TimSort.mergeAt(TimSort.java:516)
> at java.util.TimSort.mergeForceCollapse(TimSort.java:457)
> at java.util.TimSort.sort(TimSort.java:254)
> at java.util.Arrays.sort(Arrays.java:1512)
> at java.util.ArrayList.sort(ArrayList.java:1454)
> at java.util.Collections.sort(Collections.java:175)
> at
> org.apache.hadoop.yarn.server.resourcemanager.scheduler.ClusterNodeTracker.sortedNodeList(ClusterNodeTracker.java:340)
> at
> org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.FairScheduler.continuousSchedulingAttempt(FairScheduler.java:907)
> at
> org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.FairScheduler$ContinuousSchedulingThread.run(FairScheduler.java:296)
> 2018-05-25 05:53:12,743 FATAL
> org.apache.hadoop.yarn.server.resourcemanager.ResourceManager: Shutting down
> the resource manager.
> 2018-05-25 05:53:12,749 INFO org.apache.hadoop.util.ExitUtil: Exiting with
> status 1: a critical thread, FairSchedulerContinuousScheduling, that exited
> unexpectedly: java.lang.IllegalArgumentException: Comparison method violates
> its general contract!
> at java.util.TimSort.mergeHi(TimSort.java:899)
> at java.util.TimSort.mergeAt(TimSort.java:516)
> at java.util.TimSort.mergeForceCollapse(TimSort.java:457)
> at java.util.TimSort.sort(TimSort.java:254)
> at java.util.Arrays.sort(Arrays.java:1512)
> at java.util.ArrayList.sort(ArrayList.java:1454)
> at java.util.Collections.sort(Collections.java:175)
> at
> org.apache.hadoop.yarn.server.resourcemanager.scheduler.ClusterNodeTracker.sortedNodeList(ClusterNodeTracker.java:340)
> at
> org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.FairScheduler.continuousSchedulingAttempt(FairScheduler.java:907)
> at
> org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.FairScheduler$ContinuousSchedulingThread.run(FairScheduler.java:296)
> 2018-05-25 05:53:12,772 ERROR
> org.apache.hadoop.security.token.delegation.AbstractDelegationTokenSecretManager:
> ExpiredTokenRemover received java.lang.InterruptedException: sleep
> interrupted{noformat}
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