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https://issues.apache.org/jira/browse/SPARK-14159?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Xiangrui Meng reopened SPARK-14159:
-----------------------------------

> StringIndexerModel sets output column metadata incorrectly
> ----------------------------------------------------------
>
>                 Key: SPARK-14159
>                 URL: https://issues.apache.org/jira/browse/SPARK-14159
>             Project: Spark
>          Issue Type: Bug
>          Components: ML
>            Reporter: Joseph K. Bradley
>            Assignee: Joseph K. Bradley
>            Priority: Minor
>             Fix For: 2.0.0
>
>
> StringIndexerModel.transform sets the output column metadata to use name 
> inputCol.  It should not.  Fixing this causes a problem with the metadata 
> produced by RFormula.
> Fix in RFormula: I added the StringIndexer columns to prefixesToRewrite, and 
> I modified VectorAttributeRewriter to find and replace all "prefixes" since 
> attributes collect multiple prefixes from StringIndexer + Interaction.
> Note that "prefixes" is no longer accurate since internal strings may be 
> replaced.



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