Github user dbtsai commented on a diff in the pull request:
https://github.com/apache/spark/pull/8631#discussion_r39937155
--- Diff:
mllib/src/main/scala/org/apache/spark/ml/regression/LinearRegression.scala ---
@@ -493,26 +515,28 @@ private class LeastSquaresAggregator(
featuresMean: Array[Double]) extends Serializable {
private var totalCnt: Long = 0L
+ private var weightSum: Double = 0
--- End diff --
`private var weightSum: Double = 0.0`
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