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https://issues.apache.org/jira/browse/PIG-2553?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13495811#comment-13495811
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Prashant Kommireddi commented on PIG-2553:
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That's a good point Dmitriy. The patch does not handle multiple relations being
written to hbase. Is it sufficient to check for the schema (hdfs://, hbase://,
file://,...) ?
Rohini, you are right. Any implementation of StoreFunc similar to Hadoop
MultipleOutputFormat would break this. As Dmitriy suggested, I think it makes
sense to provide an option to users, in addition to logging a warning message?
> 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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