Need a way to correlate MR jobs with Pig statements

                 Key: PIG-908
             Project: Pig
          Issue Type: Wish
            Reporter: Dmitriy V. Ryaboy

Complex Pig Scripts often generate many Map-Reduce jobs, especially with the 
recent introduction of multi-store capabilities.
For example, the first script in the Pig tutorial produces 5 MR jobs.

There is currently very little support for debugging resulting jobs; if one of 
the MR jobs fails, it is hard to figure out which part of the script it was 
responsible for. Explain plans help, but even with the explain plan, a fair 
amount of effort (and sometimes, experimentation) is required to correlate the 
failing MR job with the corresponding PigLatin statements.

This ticket is created to discuss approaches to alleviating this problem.

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