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https://issues.apache.org/jira/browse/SPARK-19762?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15887187#comment-15887187
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Apache Spark commented on SPARK-19762:
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User 'sethah' has created a pull request for this issue:
https://github.com/apache/spark/pull/17094
> Implement aggregator/loss function hierarchy and apply to linear regression
> ---------------------------------------------------------------------------
>
> Key: SPARK-19762
> URL: https://issues.apache.org/jira/browse/SPARK-19762
> Project: Spark
> Issue Type: Sub-task
> Components: ML
> Affects Versions: 2.2.0
> Reporter: Seth Hendrickson
> Priority: Minor
>
> Creating this subtask as a first step for consolidating ML aggregators. We
> can start by just applying this change to linear regression, to keep the PR
> more manageable in scope.
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