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https://issues.apache.org/jira/browse/SPARK-12230?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Apache Spark reassigned SPARK-12230:
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    Assignee: Apache Spark

> WeightedLeastSquares.fit() should handle division by zero properly if 
> standard deviation of target variable is zero.
> --------------------------------------------------------------------------------------------------------------------
>
>                 Key: SPARK-12230
>                 URL: https://issues.apache.org/jira/browse/SPARK-12230
>             Project: Spark
>          Issue Type: Bug
>          Components: ML
>            Reporter: Imran Younus
>            Assignee: Apache Spark
>            Priority: Trivial
>
> This is a TODO in WeightedLeastSquares.fit() method. If the standard 
> deviation of the target variablel is zero, then the regression is 
> meaningless. I think the fit() method should inform the user and exit nicely.



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