Jose Antonio created SPARK-12015:
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             Summary: Auto convert int to Double when required in pyspark.ml
                 Key: SPARK-12015
                 URL: https://issues.apache.org/jira/browse/SPARK-12015
             Project: Spark
          Issue Type: Bug
          Components: ML, PySpark
    Affects Versions: 1.5.2
            Reporter: Jose Antonio
             Fix For: 1.6.0


I have received the following exception:

Why we cannot pass an integer when the required parameter is Double?

I think this should be upcasted silently.

java.lang.IllegalArgumentException: requirement failed: Column label must be of 
type DoubleType but was actually IntegerType.
        at scala.Predef$.require(Predef.scala:233)
        at 
org.apache.spark.ml.util.SchemaUtils$.checkColumnType(SchemaUtils.scala:42)
        at 
org.apache.spark.ml.PredictorParams$class.validateAndTransformSchema(Predictor.scala:53)
        at 
org.apache.spark.ml.classification.Classifier.org$apache$spark$ml$classification$ClassifierParams$$super$validateAndTransformSchema(Classifier.scala:56)



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