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  1. Hadoop YARN
  2. YARN-5355 YARN Timeline Service v.2: alpha 2
  3. YARN-6563

ConcurrentModificationException in TimelineCollectorManager while stopping RM

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      It is seen that ConcurrentModificationException while stopping RM when ATSv2 enabled.

      2017-05-05 15:04:11,563 WARN org.apache.hadoop.service.CompositeService: When stopping the service org.apache.hadoop.yarn.server.resourcemanager.timelineservice.RMTimelineCollectorManager : java.util.ConcurrentModificationException
      java.util.ConcurrentModificationException
      	at java.util.HashMap$HashIterator.nextNode(HashMap.java:1437)
      	at java.util.HashMap$ValueIterator.next(HashMap.java:1466)
      	at org.apache.hadoop.yarn.server.timelineservice.collector.TimelineCollectorManager.serviceStop(TimelineCollectorManager.java:222)
      	at org.apache.hadoop.service.AbstractService.stop(AbstractService.java:221)
      	at org.apache.hadoop.service.ServiceOperations.stop(ServiceOperations.java:52)
      	at org.apache.hadoop.service.ServiceOperations.stopQuietly(ServiceOperations.java:80)
      	at org.apache.hadoop.service.CompositeService.stop(CompositeService.java:157)
      	at org.apache.hadoop.service.CompositeService.serviceStop(CompositeService.java:131)
      	at org.apache.hadoop.yarn.server.resourcemanager.ResourceManager.serviceStop(ResourceManager.java:1285)
      

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            haibochen Haibo Chen Assign to me
            rohithsharma Rohith Sharma K S
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