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https://issues.apache.org/jira/browse/YARN-1374?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13809024#comment-13809024
]
Devaraj K commented on YARN-1374:
---------------------------------
It is occurring when the scheduler monitor is enabled using
'yarn.resourcemanager.scheduler.monitor.enable' configuration.
SchedulingMonitor service is getting added to RM services during RM services
init which is causing ConcurrentModificationException. SchedulingMonitor
service needs to be added to RMActiveServices instead of adding to RM service
to avoid this.
> Resource Manager fails to start due to ConcurrentModificationException
> ----------------------------------------------------------------------
>
> Key: YARN-1374
> URL: https://issues.apache.org/jira/browse/YARN-1374
> Project: Hadoop YARN
> Issue Type: Bug
> Components: resourcemanager
> Affects Versions: 2.3.0
> Reporter: Devaraj K
> Priority: Blocker
>
> Resource Manager is failing to start with the below
> ConcurrentModificationException.
> {code:xml}
> 2013-10-30 20:22:42,371 INFO org.apache.hadoop.util.HostsFileReader:
> Refreshing hosts (include/exclude) list
> 2013-10-30 20:22:42,376 INFO org.apache.hadoop.service.AbstractService:
> Service ResourceManager failed in state INITED; cause:
> java.util.ConcurrentModificationException
> java.util.ConcurrentModificationException
> at
> java.util.AbstractList$Itr.checkForComodification(AbstractList.java:372)
> at java.util.AbstractList$Itr.next(AbstractList.java:343)
> at
> java.util.Collections$UnmodifiableCollection$1.next(Collections.java:1010)
> at
> org.apache.hadoop.service.CompositeService.serviceInit(CompositeService.java:107)
> at
> org.apache.hadoop.yarn.server.resourcemanager.ResourceManager.serviceInit(ResourceManager.java:187)
> at
> org.apache.hadoop.service.AbstractService.init(AbstractService.java:163)
> at
> org.apache.hadoop.yarn.server.resourcemanager.ResourceManager.main(ResourceManager.java:944)
> 2013-10-30 20:22:42,378 INFO
> org.apache.hadoop.yarn.server.resourcemanager.RMHAProtocolService:
> Transitioning to standby
> 2013-10-30 20:22:42,378 INFO
> org.apache.hadoop.yarn.server.resourcemanager.RMHAProtocolService:
> Transitioned to standby
> 2013-10-30 20:22:42,378 FATAL
> org.apache.hadoop.yarn.server.resourcemanager.ResourceManager: Error starting
> ResourceManager
> java.util.ConcurrentModificationException
> at
> java.util.AbstractList$Itr.checkForComodification(AbstractList.java:372)
> at java.util.AbstractList$Itr.next(AbstractList.java:343)
> at
> java.util.Collections$UnmodifiableCollection$1.next(Collections.java:1010)
> at
> org.apache.hadoop.service.CompositeService.serviceInit(CompositeService.java:107)
> at
> org.apache.hadoop.yarn.server.resourcemanager.ResourceManager.serviceInit(ResourceManager.java:187)
> at
> org.apache.hadoop.service.AbstractService.init(AbstractService.java:163)
> at
> org.apache.hadoop.yarn.server.resourcemanager.ResourceManager.main(ResourceManager.java:944)
> 2013-10-30 20:22:42,379 INFO
> org.apache.hadoop.yarn.server.resourcemanager.ResourceManager: SHUTDOWN_MSG:
> /************************************************************
> SHUTDOWN_MSG: Shutting down ResourceManager at HOST-10-18-40-24/10.18.40.24
> ************************************************************/
> {code}
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