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https://issues.apache.org/jira/browse/PIG-964?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12756958#action_12756958
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Olga Natkovich commented on PIG-964:
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+1 on the code

> Handling null  in skewed join
> -----------------------------
>
>                 Key: PIG-964
>                 URL: https://issues.apache.org/jira/browse/PIG-964
>             Project: Pig
>          Issue Type: Bug
>            Reporter: Sriranjan Manjunath
>            Assignee: Sriranjan Manjunath
>         Attachments: skewedjoinnull.patch
>
>
> For null tuples, the tuple size is calculated incorrectly and thus  skewed 
> join ends up expecting a large number of reducers. Further, skewed join 
> should not bail out after the second job if the number of reducers specified 
> by the user is low. It should print a warning message and continue execution.

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