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From "Amareshwari Sriramadasu (JIRA)" <j...@apache.org>
Subject [jira] Created: (MAPREDUCE-1813) NPE in PipeMapred.MRErrorThread
Date Tue, 25 May 2010 08:07:26 GMT
NPE in PipeMapred.MRErrorThread
-------------------------------

                 Key: MAPREDUCE-1813
                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-1813
             Project: Hadoop Map/Reduce
          Issue Type: Bug
          Components: contrib/streaming
    Affects Versions: 0.20.1
            Reporter: Amareshwari Sriramadasu
             Fix For: 0.20.3


Some reduce tasks fail with following NPE
java.lang.RuntimeException: java.lang.NullPointerException
        at org.apache.hadoop.streaming.PipeMapRed.waitOutputThreads(PipeMapRed.java:325)
        at org.apache.hadoop.streaming.PipeMapRed.mapRedFinished(PipeMapRed.java:540)
        at org.apache.hadoop.streaming.PipeReducer.close(PipeReducer.java:137)
        at org.apache.hadoop.mapred.ReduceTask.runOldReducer(ReduceTask.java:474)
        at org.apache.hadoop.mapred.ReduceTask.run(ReduceTask.java:412)
        at org.apache.hadoop.mapred.Child.main(Child.java:159)
Caused by: java.lang.NullPointerException
       at org.apache.hadoop.streaming.PipeMapRed$MRErrorThread.setStatus(PipeMapRed.java:517)
        at org.apache.hadoop.streaming.PipeMapRed$MRErrorThread.run(PipeMapRed.java:449)


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