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https://issues.apache.org/jira/browse/MAPREDUCE-4144?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Jason Lowe updated MAPREDUCE-4144:
----------------------------------
Attachment: MAPREDUCE-4144.patch
Patch that avoids the early-out in canAssign() for a reserved container if
we're not doing OFF-SWITCH.
Not sure this is the best fix, as we could still have a reserved container on
this node that has already been handled by another node. But at least we won't
crash the RM when that happens.
> ResourceManager NPE while handling NODE_UPDATE
> ----------------------------------------------
>
> Key: MAPREDUCE-4144
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-4144
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Components: mrv2
> Reporter: Jason Lowe
> Priority: Critical
> Attachments: MAPREDUCE-4144-testcase.patch, MAPREDUCE-4144.patch
>
>
> The RM on one of our clusters has exited twice in the past few days because
> of an NPE while trying to handle a NODE_UPDATE:
> {noformat}
> 2012-04-12 02:09:01,672 FATAL
> org.apache.hadoop.yarn.server.resourcemanager.ResourceManager: Error in
> handling event type NODE_UPDATE to the scheduler
> [ResourceManager Event Processor]java.lang.NullPointerException
> at
> org.apache.hadoop.yarn.server.resourcemanager.scheduler.AppSchedulingInfo.allocateNodeLocal(AppSchedulingInfo.java:261)
> at
> org.apache.hadoop.yarn.server.resourcemanager.scheduler.AppSchedulingInfo.allocate(AppSchedulingInfo.java:223)
> at
> org.apache.hadoop.yarn.server.resourcemanager.scheduler.SchedulerApp.allocate(SchedulerApp.java:246)
> at
> org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.LeafQueue.assignContainer(LeafQueue.java:1229)
> at
> org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.LeafQueue.assignNodeLocalContainers(LeafQueue.java:1078)
> at
> org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.LeafQueue.assignContainersOnNode(LeafQueue.java:1048)
> at
> org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.LeafQueue.assignReservedContainer(LeafQueue.java:859)
> at
> org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.LeafQueue.assignContainers(LeafQueue.java:756)
> at
> org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.CapacityScheduler.nodeUpdate(CapacityScheduler.java:573)
> at
> org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.CapacityScheduler.handle(CapacityScheduler.java:622)
> at
> org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.CapacityScheduler.handle(CapacityScheduler.java:78)
> at
> org.apache.hadoop.yarn.server.resourcemanager.ResourceManager$SchedulerEventDispatcher$EventProcessor.run(ResourceManager.java:302)
> at java.lang.Thread.run(Thread.java:619)
> {noformat}
> This is very similar to the failure reported in MAPREDUCE-3005.
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