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https://issues.apache.org/jira/browse/YARN-1572?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

Kareem El Gebaly updated YARN-1572:
-----------------------------------
    Attachment: 0001-Fix-for-YARN-1572.patch

Fix for YARN-1572 applies to 2.3.0

> Low chance to hit NPE issue in AppSchedulingInfo#allocateNodeLocal
> ------------------------------------------------------------------
>
>                 Key: YARN-1572
>                 URL: https://issues.apache.org/jira/browse/YARN-1572
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: scheduler
>    Affects Versions: 2.3.0
>            Reporter: Wenwu Peng
>            Assignee: Wenwu Peng
>         Attachments: 0001-Fix-for-YARN-1572.patch, YARN-1572-log.tar.gz, 
> conf.tar.gz, log.tar.gz
>
>
> we have lower chance to hit NPE in allocateNodeLocal  when run benchmark(hit 
> 4 in 20 times).
> {code}
> 2014-07-31 04:18:19,653 INFO 
> org.apache.hadoop.yarn.server.resourcemanager.scheduler.SchedulerNode: 
> Assigned container container_1406794589275_0001_01_000021 of capacity 
> <memory:1024, vCores:1> on host datanode10:57281, which has 6 containers, 
> <memory:6144, vCores:6> used and <memory:2048, vCores:2> available after 
> allocation
> 2014-07-31 04:18:19,654 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:311)
>         at 
> org.apache.hadoop.yarn.server.resourcemanager.scheduler.AppSchedulingInfo.allocate(AppSchedulingInfo.java:268)
>         at 
> org.apache.hadoop.yarn.server.resourcemanager.scheduler.common.fica.FiCaSchedulerApp.allocate(FiCaSchedulerApp.java:136)
>         at 
> org.apache.hadoop.yarn.server.resourcemanager.scheduler.fifo.FifoScheduler.assignContainer(FifoScheduler.java:683)
>         at 
> org.apache.hadoop.yarn.server.resourcemanager.scheduler.fifo.FifoScheduler.assignNodeLocalContainers(FifoScheduler.java:602)
>         at 
> org.apache.hadoop.yarn.server.resourcemanager.scheduler.fifo.FifoScheduler.assignContainersOnNode(FifoScheduler.java:560)
>         at 
> org.apache.hadoop.yarn.server.resourcemanager.scheduler.fifo.FifoScheduler.assignContainers(FifoScheduler.java:488)
>         at 
> org.apache.hadoop.yarn.server.resourcemanager.scheduler.fifo.FifoScheduler.nodeUpdate(FifoScheduler.java:729)
>         at 
> org.apache.hadoop.yarn.server.resourcemanager.scheduler.fifo.FifoScheduler.handle(FifoScheduler.java:774)
>         at 
> org.apache.hadoop.yarn.server.resourcemanager.scheduler.fifo.FifoScheduler.handle(FifoScheduler.java:101)
>         at 
> org.apache.hadoop.yarn.server.resourcemanager.ResourceManager$SchedulerEventDispatcher$EventProcessor.run(ResourceManager.java:599)
>         at java.lang.Thread.run(Thread.java:662)
> 2014-07-31 04:18:19,655 INFO 
> org.apache.hadoop.yarn.server.resourcemanager.ResourceManager: Exiting, bbye..
> {code}



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