Github user clockfly commented on a diff in the pull request:
https://github.com/apache/spark/pull/14850#discussion_r77177520
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/ScalaUDF.scala
---
@@ -1057,5 +1059,19 @@ case class ScalaUDF(
private[this] val converter =
CatalystTypeConverters.createToCatalystConverter(dataType)
- override def eval(input: InternalRow): Any = converter(f(input))
+ val npeErrorMessage = "Given UDF throws NPE during execution, please
check the UDF " +
+ "to make sure it handles null parameters correctly."
+
+ override def eval(input: InternalRow): Any = {
+ val result = try {
+ f(input)
+ } catch {
+ case e: NullPointerException =>
--- End diff --
It is a bit hacky to set stack trace like this.
npe.setStackTrace(e.getStackTrace)
If user search the code line reported in the stack trace, user may not able
to find the code that matches the error message.
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