[SPARK-16404] LeastSquaresAggregator in Linear Regression serializes unnecessary data

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Component/s: ML
• Assignee: Seth Hendrickson
• Reporter: Seth Hendrickson
• Shepherd: DB Tsai
• Created: 06/Jul/16 22:14
• Updated: 08/Aug/16 07:03
• Resolved: 08/Aug/16 07:03

Description

This is basically the same issue as SPARK-16008, but for linear regression, where coefficients and featuresStd are unnecessarily serialized between stages.

Issue Links

• relates to: SPARK-16933 AFTAggregator in AFTSurvivalRegression serializes unnecessary data
• links to: [Github] Pull Request #14109 (sethah)