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https://issues.apache.org/jira/browse/YARN-335?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13551472#comment-13551472
]
Sandy Ryza commented on YARN-335:
---------------------------------
2012-12-20 05:45:12,554 FATAL
org.apache.hadoop.yarn.server.resourcemanager.ResourceManager: Error in
handling event type NODE_UPDATE to the scheduler
java.lang.NullPointerException
at
org.apache.hadoop.yarn.server.resourcemanager.scheduler.AppSchedulingInfo.allocateNodeLocal(AppSchedulingInfo.java:262)
at
org.apache.hadoop.yarn.server.resourcemanager.scheduler.AppSchedulingInfo.allocate(AppSchedulingInfo.java:223)
at
org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.FSSchedulerApp.allocate(FSSchedulerApp.java:551)
at
org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.AppSchedulable.assignContainer(AppSchedulable.java:250)
at
org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.AppSchedulable.assignContainer(AppSchedulable.java:318)
at
org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.FSLeafQueue.assignContainer(FSLeafQueue.java:180)
at
org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.FairScheduler.nodeUpdate(FairScheduler.java:780)
at
org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.FairScheduler.handle(FairScheduler.java:843)
at
org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.FairScheduler.handle(FairScheduler.java:98)
at
org.apache.hadoop.yarn.server.resourcemanager.ResourceManager$SchedulerEventDispatcher$EventProcessor.run(ResourceManager.java:330)
at java.lang.Thread.run(Thread.java:662)
2012-12-20 05:45:12,556 INFO
org.apache.hadoop.yarn.server.resourcemanager.ResourceManager: Exiting, bbye..
> Fair scheduler doesn't check whether rack needs containers before assigning
> to node
> -----------------------------------------------------------------------------------
>
> Key: YARN-335
> URL: https://issues.apache.org/jira/browse/YARN-335
> Project: Hadoop YARN
> Issue Type: Bug
> Affects Versions: 2.0.2-alpha
> Reporter: Sandy Ryza
> Assignee: Sandy Ryza
>
> If an application has an outstanding request on a node, the fair scheduler
> may try to place a container on that node without checking whether that
> node's rack needs any containers. If the rack doesn't need any containers,
> none should be scheduled on the node.
> This can cause an NPE in the fair scheduler.
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