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From "Dmitriy V. Ryaboy (JIRA)" <j...@apache.org>
Subject [jira] Created: (PIG-908) Need a way to correlate MR jobs with Pig statements
Date Tue, 04 Aug 2009 19:56:15 GMT
Need a way to correlate MR jobs with Pig statements

                 Key: PIG-908
                 URL: https://issues.apache.org/jira/browse/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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