Anubhav Dhoot created YARN-4235:
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Summary: FairScheduler PrimaryGroup does not handle empty groups
returned for a user
Key: YARN-4235
URL: https://issues.apache.org/jira/browse/YARN-4235
Project: Hadoop YARN
Issue Type: Bug
Reporter: Anubhav Dhoot
Assignee: Anubhav Dhoot
We see NPE if empty groups are returned for a user. This causes a NPE and cause
RM to crash as below
{noformat}
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..
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