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https://issues.apache.org/jira/browse/MAPREDUCE-6361?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14542155#comment-14542155
]
Hudson commented on MAPREDUCE-6361:
-----------------------------------
FAILURE: Integrated in Hadoop-Mapreduce-trunk #2142 (See
[https://builds.apache.org/job/Hadoop-Mapreduce-trunk/2142/])
MAPREDUCE-6361. NPE issue in shuffle caused by concurrent issue between
copySucceeded() in one thread and copyFailed() in another thread on the same
host. Contributed by Junping Du. (ozawa: rev
f4e2b3cc0b1f4e49c306bc09a9dddd0495225bb2)
*
hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/test/java/org/apache/hadoop/mapreduce/task/reduce/TestShuffleScheduler.java
* hadoop-mapreduce-project/CHANGES.txt
*
hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapreduce/task/reduce/ShuffleSchedulerImpl.java
> 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: 2.8.0
>
> 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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