[jira] [Created] (SPARK-3249) Fix links in ScalaDoc that cause warning messages in `sbt/sbt unidoc`

["Xiangrui Meng (JIRA)" <ji...@apache.org>]

Xiangrui Meng created SPARK-3249:
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             Summary: Fix links in ScalaDoc that cause warning messages in `sbt/sbt unidoc`
                 Key: SPARK-3249
                 URL: https://issues.apache.org/jira/browse/SPARK-3249
             Project: Spark
          Issue Type: Sub-task
          Components: Documentation, MLlib
    Affects Versions: 1.1.0
            Reporter: Xiangrui Meng
            Priority: Minor


If there are multiple overloaded versions of a method, we should make the links more specific. Otherwise, `sbt/sbt unidoc` generates warning messages like the following:

{code}
[warn] mllib/src/main/scala/org/apache/spark/mllib/tree/DecisionTree.scala:305: The link target "org.apache.spark.mllib.tree.DecisionTree$#trainClassifier" is ambiguous. Several members fit the target:
[warn] (input: org.apache.spark.api.java.JavaRDD[org.apache.spark.mllib.regression.LabeledPoint],numClassesForClassification: Int,categoricalFeaturesInfo: java.util.Map[Integer,Integer],impurity: String,maxDepth: Int,maxBins: Int): org.apache.spark.mllib.tree.model.DecisionTreeModel in object DecisionTree [chosen]
[warn] (input: org.apache.spark.rdd.RDD[org.apache.spark.mllib.regression.LabeledPoint],numClassesForClassification: Int,categoricalFeaturesInfo: Map[Int,Int],impurity: String,maxDepth: Int,maxBins: Int): org.apache.spark.mllib.tree.model.DecisionTreeModel in object DecisionTree
{code}



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