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Posted to mapreduce-issues@hadoop.apache.org by "Junping Du (JIRA)" <ji...@apache.org> on 2015/05/11 17:37:00 UTC
[jira] [Created] (MAPREDUCE-6361) NPE issue in shuffle caused by
concurrent issue between copySucceeded() in one thread and copyFailed() in
another thread on the same host
Junping Du created MAPREDUCE-6361:
-------------------------------------
Summary: 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
Reporter: Junping Du
Assignee: Junping Du
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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