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From "Benjamin Kim (JIRA)" <j...@apache.org>
Subject [jira] [Created] (MAPREDUCE-4718) MapReduce fails If I pass a parameter as a S3 folder
Date Wed, 10 Oct 2012 11:31:03 GMT
Benjamin Kim created MAPREDUCE-4718:
---------------------------------------

             Summary: MapReduce fails If I pass a parameter as a S3 folder
                 Key: MAPREDUCE-4718
                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-4718
             Project: Hadoop Map/Reduce
          Issue Type: Bug
          Components: job submission
    Affects Versions: 1.0.3, 1.0.0
         Environment: Hadoop with default configurations
            Reporter: Benjamin Kim


I'm running a wordcount MR as follows

hadoop jar WordCount.jar wordcount.WordCountDriver s3n://bucket/wordcount/input s3n://bucket/wordcount/output
 
s3n://bucket/wordcount/input is a s3 object that contains other input files.

However I get following NPE error

12/10/02 18:56:23 INFO mapred.JobClient:  map 0% reduce 0%
12/10/02 18:56:54 INFO mapred.JobClient:  map 50% reduce 0%
        12/10/02 18:56:56 INFO mapred.JobClient: Task Id : attempt_201210021853_0001_m_000001_0,
Status : FAILED
java.lang.NullPointerException
        at org.apache.hadoop.fs.s3native.NativeS3FileSystem$NativeS3FsInputStream.close(NativeS3FileSystem.java:106)
        at java.io.BufferedInputStream.close(BufferedInputStream.java:451)
        at java.io.FilterInputStream.close(FilterInputStream.java:155)
        at org.apache.hadoop.util.LineReader.close(LineReader.java:83)
        at org.apache.hadoop.mapreduce.lib.input.LineRecordReader.close(LineRecordReader.java:144)
        at org.apache.hadoop.mapred.MapTask$NewTrackingRecordReader.close(MapTask.java:497)
        at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:765)
        at org.apache.hadoop.mapred.MapTask.run(MapTask.java:370)
        at org.apache.hadoop.mapred.Child$4.run(Child.java:255)
        at java.security.AccessController.doPrivileged(Native Method)
        at javax.security.auth.Subject.doAs(Subject.java:396)
        at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1121)
        at org.apache.hadoop.mapred.Child.main(Child.java:249)

MR runs fine if i specify more specific input path such as s3n://bucket/wordcount/input/file.txt

MR fails if I pass s3 folder as a parameter


In summary,
This works
 hadoop jar ./hadoop-examples-1.0.3.jar wordcount /user/hadoop/wordcount/input/ s3n://bucket/wordcount/output/

This doesn't work
 hadoop jar ./hadoop-examples-1.0.3.jar wordcount s3n://bucket/wordcount/input/ s3n://bucket/wordcount/output/

(both input path are directories)



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