[YARN-3762] FairScheduler: CME on FSParentQueue#getQueueUserAclInfo

• Type: Bug
• Status: Resolved
• Priority: Critical
• Resolution: Fixed
• Affects Version/s: 2.7.0
• Fix Version/s: 2.8.0, 3.0.0-alpha1
• Component/s: fairscheduler
• Target Version/s: 2.8.0
• Hadoop Flags: Reviewed
• Assignee: Karthik Kambatla
• Reporter: Karthik Kambatla
• Created: 02/Jun/15 23:32
• Updated: 30/Aug/16 01:21
• Resolved: 03/Jun/15 20:53

Description

In our testing, we ran into the following ConcurrentModificationException:

halxg.cloudera.com:8042, nodeRackName/rackvb07, nodeNumContainers0
15/05/22 13:02:22 INFO distributedshell.Client: Queue info, queueName=root.testyarnpool3, queueCurrentCapacity=0.0, queueMaxCapacity=-1.0, queueApplicationCount=0, queueChildQueueCount=0
15/05/22 13:02:22 FATAL distributedshell.Client: Error running Client
java.util.ConcurrentModificationException: java.util.ConcurrentModificationException
	at java.util.ArrayList$Itr.checkForComodification(ArrayList.java:901)
	at java.util.ArrayList$Itr.next(ArrayList.java:851)
	at org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.FSParentQueue.getQueueUserAclInfo(FSParentQueue.java:155)
	at org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.FairScheduler.getQueueUserAclInfo(FairScheduler.java:1395)
	at org.apache.hadoop.yarn.server.resourcemanager.ClientRMService.getQueueUserAcls(ClientRMService.java:880)