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Hudson commented on MAPREDUCE-6361: ----------------------------------- FAILURE: Integrated in Hadoop-Hdfs-trunk-Java8 #184 (See [https://builds.apache.org/job/Hadoop-Hdfs-trunk-Java8/184/]) 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/CHANGES.txt * hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/test/java/org/apache/hadoop/mapreduce/task/reduce/TestShuffleScheduler.java * 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) -- This message was sent by Atlassian JIRA (v6.3.4#6332)