Jason Lowe created TEZ-3368:
-------------------------------
Summary: NPE in DelayedContainerManager
Key: TEZ-3368
URL: https://issues.apache.org/jira/browse/TEZ-3368
Project: Apache Tez
Issue Type: Bug
Affects Versions: 0.7.1
Reporter: Jason Lowe
Saw a Tez AM hang due to an NPE in the DelayedContainerManager:
{noformat}
2016-07-17 01:53:23,157 [ERROR] [DelayedContainerManager]
|yarn.YarnUncaughtExceptionHandler|: Thread
Thread[DelayedContainerManager,5,main] threw an Exception.
java.lang.NullPointerException
at
org.apache.tez.dag.app.rm.TezAMRMClientAsync.getMatchingRequestsForTopPriority(TezAMRMClientAsync.java:142)
at
org.apache.tez.dag.app.rm.YarnTaskSchedulerService.getMatchingRequestWithoutPriority(YarnTaskSchedulerService.java:1474)
at
org.apache.tez.dag.app.rm.YarnTaskSchedulerService.access$500(YarnTaskSchedulerService.java:84)
at
org.apache.tez.dag.app.rm.YarnTaskSchedulerService$NodeLocalContainerAssigner.assignReUsedContainer(YarnTaskSchedulerService.java:1869)
at
org.apache.tez.dag.app.rm.YarnTaskSchedulerService.assignReUsedContainerWithLocation(YarnTaskSchedulerService.java:1753)
at
org.apache.tez.dag.app.rm.YarnTaskSchedulerService.assignDelayedContainer(YarnTaskSchedulerService.java:733)
at
org.apache.tez.dag.app.rm.YarnTaskSchedulerService.access$600(YarnTaskSchedulerService.java:84)
at
org.apache.tez.dag.app.rm.YarnTaskSchedulerService$DelayedContainerManager.run(YarnTaskSchedulerService.java:2030)
{noformat}
After the DelayedContainerManager thread exited the AM proceeded to receive
requested containers that would go unused until the container allocations
expired. Then they would be re-requested, and the cycle repeated indefinitely.
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