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From "Rohini Palaniswamy (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (PIG-2553) Pig shouldn't allow attempts to write multiple relations into same directory
Date Fri, 16 Nov 2012 03:58:13 GMT

    [ https://issues.apache.org/jira/browse/PIG-2553?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13498583#comment-13498583

Rohini Palaniswamy commented on PIG-2553:

Sounds good to me Prashant. I can't think of any objections to having pig.location.check.strict
default as false and the 4 point proposal you have outlined. 
> Pig shouldn't allow attempts to write multiple relations into same directory
> ----------------------------------------------------------------------------
>                 Key: PIG-2553
>                 URL: https://issues.apache.org/jira/browse/PIG-2553
>             Project: Pig
>          Issue Type: Improvement
>            Reporter: Dmitriy V. Ryaboy
>            Assignee: Prashant Kommireddi
>         Attachments: PIG-2553.patch
> We've seen multiple occasions where users accidentally try to store 2 or more different
relations to the same destination directory. Currently, this passes the Pig planner and fails
on MR side due to concurrent attempts to create the same part file on the reducer. This is
extremely confusing to the user, and hard to debug.
> We should instead fail their scripts before they are even submitted, since we can identify
the erroneous condition from the beginning.

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