Github user feynmanliang commented on a diff in the pull request:
https://github.com/apache/spark/pull/7099#discussion_r34200150
--- Diff:
mllib/src/main/scala/org/apache/spark/ml/regression/LinearRegression.scala ---
@@ -209,7 +219,13 @@ class LinearRegression(override val uid: String)
if (handlePersistence) instances.unpersist()
- copyValues(new LinearRegressionModel(uid, weights, intercept))
+ val model = copyValues(new LinearRegressionModel(uid, weights,
intercept))
--- End diff --
Actually, I need to call copyValues there because `model.transform` used on
L223 requires `predictCol` to be set.
`JavaLinearRegressionSuite#linearRegressionWithSetters()` will fail otherwise.
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