[YARN-6563] ConcurrentModificationException in TimelineCollectorManager while stopping RM

• Type: Sub-task
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 2.9.0, YARN-5355, YARN-5355-branch-2, 3.0.0-alpha4
• Component/s: resourcemanager
• Hadoop Flags: Reviewed
• Assignee: Haibo Chen
• Reporter: Rohith Sharma K S
• Created: 05/May/17 10:26
• Updated: 24/Apr/18 20:49
• Resolved: 09/May/17 18:19

Description

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)