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From "Cheolsoo Park (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (PIG-2553) Pig shouldn't allow attempts to write multiple relations into same directory
Date Sun, 17 Feb 2013 05:47:25 GMT

    [ https://issues.apache.org/jira/browse/PIG-2553?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13580126#comment-13580126

Cheolsoo Park commented on PIG-2553:

+1. I ran full unit test and found no additional failures.

There are failing unit test case in trunk, but they're all known issues.

> 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_1.patch, PIG-2553_2.patch, 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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