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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-6361) NPE issue in shuffle caused by concurrent issue between copySucceeded() in one thread and copyFailed() in another thread on the same host
Date Wed, 20 May 2015 11:54:08 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-6361?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14552188#comment-14552188
] 

Hudson commented on MAPREDUCE-6361:
-----------------------------------

FAILURE: Integrated in Hadoop-Yarn-trunk-Java8 #202 (See [https://builds.apache.org/job/Hadoop-Yarn-trunk-Java8/202/])
Moving MAPREDUCE-6361 to 2.7.1 CHANGES.txt (junping_du: rev 8ca1dfeebb660741aa6e5b137cd1088815b614cf)
* hadoop-mapreduce-project/CHANGES.txt


> NPE issue in shuffle caused by concurrent issue between copySucceeded() in one thread
and copyFailed() in another thread on the same host
> -----------------------------------------------------------------------------------------------------------------------------------------
>
>                 Key: MAPREDUCE-6361
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-6361
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>    Affects Versions: 2.7.0
>            Reporter: Junping Du
>            Assignee: Junping Du
>            Priority: Critical
>             Fix For: 2.7.1
>
>         Attachments: MAPREDUCE-6361-v1.patch
>
>
> The failure in log:
> 2015-05-08 21:00:00,513 WARN [main] org.apache.hadoop.mapred.YarnChild: Exception running
child : org.apache.hadoop.mapreduce.task.reduce.Shuffle$ShuffleError: error in shuffle in
fetcher#25
>          at org.apache.hadoop.mapreduce.task.reduce.Shuffle.run(Shuffle.java:134)
>          at org.apache.hadoop.mapred.ReduceTask.run(ReduceTask.java:376)
>          at org.apache.hadoop.mapred.YarnChild$2.run(YarnChild.java:163)
>          at java.security.AccessController.doPrivileged(Native Method)
>          at javax.security.auth.Subject.doAs(Subject.java:415)
>          at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1628)
>          at org.apache.hadoop.mapred.YarnChild.main(YarnChild.java:158)
> Caused by: java.lang.NullPointerException
>          at org.apache.hadoop.mapreduce.task.reduce.ShuffleSchedulerImpl.copyFailed(ShuffleSchedulerImpl.java:267)
>          at org.apache.hadoop.mapreduce.task.reduce.Fetcher.copyFromHost(Fetcher.java:308)
>          at org.apache.hadoop.mapreduce.task.reduce.Fetcher.run(Fetcher.java:193)



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