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https://issues.apache.org/jira/browse/YARN-1374?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13809793#comment-13809793
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Karthik Kambatla commented on YARN-1374:
----------------------------------------
The test fails without the fix and passes with it.
> 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
> Assignee: Karthik Kambatla
> Priority: Blocker
> Attachments: yarn-1374-1.patch, yarn-1374-1.patch
>
>
> 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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