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From "Keuntae Park (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (TAJO-244) Occur NullPointerException when assignToNonLeafTasks
Date Sun, 13 Oct 2013 03:33:41 GMT

    [ https://issues.apache.org/jira/browse/TAJO-244?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13793563#comment-13793563
] 

Keuntae Park commented on TAJO-244:
-----------------------------------

+1
Looks great for me. 
This bug seems to be caused by thread unsafe object 'containers' in AbstractResourceAllocator.
After the patch, I tested 200 times and had no problem. 

> Occur NullPointerException when assignToNonLeafTasks
> ----------------------------------------------------
>
>                 Key: TAJO-244
>                 URL: https://issues.apache.org/jira/browse/TAJO-244
>             Project: Tajo
>          Issue Type: Bug
>            Reporter: hyoungjunkim
>            Assignee: Hyunsik Choi
>             Fix For: 0.2-incubating
>
>         Attachments: TAJO-244.patch
>
>
> This error occurs randomly.
> {code}
> Exception in thread "Thread-63" java.lang.NullPointerException
>         at org.apache.tajo.master.TaskSchedulerImpl$ScheduledRequests.assignToNonLeafTasks(TaskSchedulerImpl.java:531)
>         at org.apache.tajo.master.TaskSchedulerImpl.schedule(TaskSchedulerImpl.java:197)
>         at org.apache.tajo.master.TaskSchedulerImpl$2.run(TaskSchedulerImpl.java:120)
> {code}



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