Bravo Zhang commented on SPARK-21245:

User 'bravo-zhang' has created a pull request for this issue:

> Resolve code duplication for classification/regression summarizers
> ------------------------------------------------------------------
>                 Key: SPARK-21245
>                 URL: https://issues.apache.org/jira/browse/SPARK-21245
>             Project: Spark
>          Issue Type: Sub-task
>          Components: ML
>    Affects Versions: 2.2.1
>            Reporter: Seth Hendrickson
>            Priority: Minor
>              Labels: starter
> In several places (LogReg, LinReg, SVC) in Spark ML, we collect summary 
> information about training data using {{MultivariateOnlineSummarizer}} and 
> {{MulticlassSummarizer}}. We have the same code appearing in several places 
> (and including test suites). We can eliminate this by creating a common 
> implementation somewhere.

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