Yanbo Liang created SPARK-10751:
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Summary: ML Param validate should print better error information
Key: SPARK-10751
URL: https://issues.apache.org/jira/browse/SPARK-10751
Project: Spark
Issue Type: Bug
Components: ML
Reporter: Yanbo Liang
Priority: Minor
Currently when you set illegal value for params of array type (such as
IntArrayParam, DoubleArrayParam, StringArrayParam), it will throw
IllegalArgumentException but with incomprehensible error information.
For example:
val vectorSlicer = new
VectorSlicer().setInputCol("features").setOutputCol("result")
vectorSlicer.setIndices(Array.empty).setNames(Array("f1", "f4", "f1"))
It will throw IllegalArgumentException as:
vectorSlicer_b3b4d1a10f43 parameter names given invalid value
[Ljava.lang.String;@798256c5.
java.lang.IllegalArgumentException: vectorSlicer_b3b4d1a10f43 parameter names
given invalid value [Ljava.lang.String;@798256c5.
Users can not understand which params were set incorrectly.
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