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http://issues.apache.org/jira/browse/HADOOP-476?page=comments#action_12456622 ] 
            
Yoram Arnon commented on HADOOP-476:
------------------------------------

does the patch address the case where the mapper or reducer are not shipped as 
part of the command?
arguments to -file should be verified locally, but arguments to -reducer and 
-mapper should be verified against the cluster nodes, unless listed under -file.


> Streaming should check for correctness of the task
> --------------------------------------------------
>
>                 Key: HADOOP-476
>                 URL: http://issues.apache.org/jira/browse/HADOOP-476
>             Project: Hadoop
>          Issue Type: Bug
>          Components: contrib/streaming
>            Reporter: arkady borkovsky
>         Assigned To: Sanjay Dahiya
>         Attachments: Hadoop-476.patch
>
>
> Currently, if anythin is wrong with streaming job, it dies without any 
> explanation.
> Before creating and running actual MapReduce job, Streaming should check if:
> -- the executables (or scripts) for -mapper and -reducer are available and 
> have right permissions
> -- the input fragments exist

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