Details
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Bug
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Status: Resolved
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Major
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Resolution: Fixed
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None
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None
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Reviewed
Description
We see NPE if empty groups are returned for a user. This causes a NPE and cause RM to crash as below
2015-09-22 16:51:52,780 FATAL org.apache.hadoop.yarn.server.resourcemanager.ResourceManager: Error in handling event type APP_ADDED to the scheduler java.lang.IndexOutOfBoundsException: Index: 0 at java.util.Collections$EmptyList.get(Collections.java:3212) at org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.QueuePlacementRule$PrimaryGroup.getQueueForApp(QueuePlacementRule.java:149) at org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.QueuePlacementRule.assignAppToQueue(QueuePlacementRule.java:74) at org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.QueuePlacementPolicy.assignAppToQueue(QueuePlacementPolicy.java:167) at org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.FairScheduler.assignToQueue(FairScheduler.java:689) at org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.FairScheduler.addApplication(FairScheduler.java:595) at org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.FairScheduler.handle(FairScheduler.java:1180) at org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.FairScheduler.handle(FairScheduler.java:111) at org.apache.hadoop.yarn.server.resourcemanager.ResourceManager$SchedulerEventDispatcher$EventProcessor.run(ResourceManager.java:684) at java.lang.Thread.run(Thread.java:745) 2015-09-22 16:51:52,797 INFO org.apache.hadoop.yarn.server.resourcemanager.ResourceManager: Exiting, bbye..