Dustin Cote created YARN-3419:
---------------------------------
Summary: ConcurrentModificationException in FSLeafQueue
Key: YARN-3419
URL: https://issues.apache.org/jira/browse/YARN-3419
Project: Hadoop YARN
Issue Type: Bug
Components: yarn
Affects Versions: 2.5.0
Reporter: Dustin Cote
Assignee: Dustin Cote
Heavy Resource Manager use causes a manifestation of a
ConcurrentModificationException in FSLeafQueue. Doesn't look like FSLeafQueue
does anything except add, remove, traverse, and get sorted, so I think we could
use a CopyOnWriteArrayList that will use a bit more memory but remove these
exceptions. Seems to me that there will be relatively few app adds compared to
the number of traversals. Stack trace below:
2015-03-27 00:47:34,773 ERROR
org.apache.hadoop.yarn.server.resourcemanager.ResourceManager: Error in
handling event type CONTAINER_ALLOCATED for applicationAttempt
application_1427401429921_3388
java.util.ConcurrentModificationException
at java.util.ArrayList$Itr.checkForComodification(ArrayList.java:859)
at java.util.ArrayList$Itr.next(ArrayList.java:831)
at
org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.FSLeafQueue.getResourceUsage(FSLeafQueue.java:147)
at
org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.FSAppAttempt.getHeadroom(FSAppAttempt.java:180)
at
org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.FairScheduler.allocate(FairScheduler.java:923)
at
org.apache.hadoop.yarn.server.resourcemanager.rmapp.attempt.RMAppAttemptImpl$AMContainerAllocatedTransition.transition(RMAppAttemptImpl.java:929)
at
org.apache.hadoop.yarn.server.resourcemanager.rmapp.attempt.RMAppAttemptImpl$AMContainerAllocatedTransition.transition(RMAppAttemptImpl.java:922)
at
org.apache.hadoop.yarn.state.StateMachineFactory$MultipleInternalArc.doTransition(StateMachineFactory.java:385)
at
org.apache.hadoop.yarn.state.StateMachineFactory.doTransition(StateMachineFactory.java:302)
at
org.apache.hadoop.yarn.state.StateMachineFactory.access$300(StateMachineFactory.java:46)
at
org.apache.hadoop.yarn.state.StateMachineFactory$InternalStateMachine.doTransition(StateMachineFactory.java:448)
at
org.apache.hadoop.yarn.server.resourcemanager.rmapp.attempt.RMAppAttemptImpl.handle(RMAppAttemptImpl.java:757)
at
org.apache.hadoop.yarn.server.resourcemanager.rmapp.attempt.RMAppAttemptImpl.handle(RMAppAttemptImpl.java:110)
at
org.apache.hadoop.yarn.server.resourcemanager.ResourceManager$ApplicationAttemptEventDispatcher.handle(ResourceManager.java:765)
at
org.apache.hadoop.yarn.server.resourcemanager.ResourceManager$ApplicationAttemptEventDispatcher.handle(ResourceManager.java:746)
at
org.apache.hadoop.yarn.event.AsyncDispatcher.dispatch(AsyncDispatcher.java:173)
at
org.apache.hadoop.yarn.event.AsyncDispatcher$1.run(AsyncDispatcher.java:106)
at java.lang.Thread.run(Thread.java:744)
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