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From "arkady borkovsky (JIRA)" <j...@apache.org>
Subject [jira] Created: (HADOOP-2438) In streaming, jobs that used to work, crash in the map phase -- even if the mapper is /bin/cat
Date Sat, 15 Dec 2007 23:58:43 GMT
In streaming, jobs that used to work, crash in the map phase -- even if the mapper is /bin/cat
----------------------------------------------------------------------------------------------

                 Key: HADOOP-2438
                 URL: https://issues.apache.org/jira/browse/HADOOP-2438
             Project: Hadoop
          Issue Type: Bug
    Affects Versions: 0.15.1
            Reporter: arkady borkovsky


The exception is either "out of memory" of or "broken pipe" -- see both stack dumps bellow.

st Hadoop input: |null|
last tool output: |[B@20fa83|
Date: Sat Dec 15 21:02:18 UTC 2007
java.io.IOException: Broken pipe
        at java.io.FileOutputStream.writeBytes(Native Method)
        at java.io.FileOutputStream.write(FileOutputStream.java:260)
        at java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:65)
        at java.io.BufferedOutputStream.flush(BufferedOutputStream.java:123)
        at java.io.BufferedOutputStream.flush(BufferedOutputStream.java:124)
        at java.io.DataOutputStream.flush(DataOutputStream.java:106)
        at org.apache.hadoop.streaming.PipeMapper.map(PipeMapper.java:96)
        at org.apache.hadoop.mapred.MapRunner.run(MapRunner.java:50)
        at org.apache.hadoop.mapred.MapTask.run(MapTask.java:192)
        at org.apache.hadoop.mapred.TaskTracker$Child.main(TaskTracker.java:1760)


        at org.apache.hadoop.streaming.PipeMapper.map(PipeMapper.java:107)
        at org.apache.hadoop.mapred.MapRunner.run(MapRunner.java:50)
        at org.apache.hadoop.mapred.MapTask.run(MapTask.java:192)
        at org.apache.hadoop.mapred.TaskTracker$Child.main(TaskTracker.java:1760)



-------------------------------------------------
java.io.IOException: MROutput/MRErrThread
failed:java.lang.OutOfMemoryError: Java heap space
        at java.util.Arrays.copyOf(Arrays.java:2786)
        at java.io.ByteArrayOutputStream.write(ByteArrayOutputStream.java:94)
        at java.io.DataOutputStream.write(DataOutputStream.java:90)
        at org.apache.hadoop.io.Text.write(Text.java:243)
        at org.apache.hadoop.mapred.MapTask$MapOutputBuffer.collect (MapTask.java:347)
        at org.apache.hadoop.streaming.PipeMapRed$MROutputThread.run (PipeMapRed.java:344)

        at org.apache.hadoop.streaming.PipeMapper.map(PipeMapper.java:76)
        at org.apache.hadoop.mapred.MapRunner.run(MapRunner.java:50)
        at org.apache.hadoop.mapred.MapTask.run(MapTask.java:192)
        at org.apache.hadoop.mapred.TaskTracker$Child.main(TaskTracker.java: 
1760)


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