Github user mgaido91 commented on a diff in the pull request:
https://github.com/apache/spark/pull/22032#discussion_r208637385
--- Diff: mllib/src/main/scala/org/apache/spark/ml/feature/LSH.scala ---
@@ -97,7 +97,8 @@ private[ml] abstract class LSHModel[T <: LSHModel[T]]
override def transform(dataset: Dataset[_]): DataFrame = {
transformSchema(dataset.schema, logging = true)
- val transformUDF = udf(hashFunction, DataTypes.createArrayType(new
VectorUDT))
+ val transformUDF = udf({ v: Vector => hashFunction(v) },
--- End diff --
not really, you had `hashFunction(_)` which doesn't work. `hashFunction(_:
Vector)` or `hashFunction _` should work instead.
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