Github user yanboliang commented on a diff in the pull request:
https://github.com/apache/spark/pull/16028#discussion_r125157589
--- Diff:
mllib/src/main/scala/org/apache/spark/ml/regression/LinearRegression.scala ---
@@ -53,7 +53,23 @@ import org.apache.spark.storage.StorageLevel
private[regression] trait LinearRegressionParams extends PredictorParams
with HasRegParam with HasElasticNetParam with HasMaxIter with HasTol
with HasFitIntercept with HasStandardization with HasWeightCol with
HasSolver
- with HasAggregationDepth
+ with HasAggregationDepth {
+
+ import LinearRegression._
+
+ /**
+ * The solver algorithm for optimization.
+ * Supported options: "l-bfgs", "normal" and "auto".
+ * Default: "auto"
+ *
+ * @group param
+ */
+ @Since("2.3.0")
--- End diff --
2.3.0 -> 1.6.0
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