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Date: Thu, 29 Sep 2011 17:07:45 +0000 (UTC)
From: "Ramya Sunil (Created) (JIRA)" <jira@apache.org>
To: mapreduce-dev@hadoop.apache.org
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Subject: [jira] [Created] (MAPREDUCE-3122) -libjars with streaming does not
 create symlink in the cwd of task
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-libjars with streaming does not create symlink in the cwd of task
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                 Key: MAPREDUCE-3122
                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-3122
             Project: Hadoop Map/Reduce
          Issue Type: Bug
          Components: contrib/streaming
    Affects Versions: 0.20.205.0
            Reporter: Ramya Sunil


When libjars option is used with streaming, the symlink to the jar file is not created in the working dir of the task. Any map/reduce tasks which uses this jar fails with NoClassDefFoundError

For e.g:

$ hadoop jar hadoop-streaming.jar -libjars /home/ramya/HelloWorld.jar -input input.txt -output Out -mapper "mapper.sh" -reducer NONE -file /home/ramya/mapper.sh

$ cat /home/ramya/mapper.sh
#!/bin/sh

cat &> /dev/null
java -cp HelloWorld.jar HelloWorld

$ java -cp /home/ramya/HelloWorld.jar HelloWorld
Hello World

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