HyukjinKwon commented on a change in pull request #32600:
URL: https://github.com/apache/spark/pull/32600#discussion_r636574861
##########
File path:
core/src/main/scala/org/apache/spark/internal/config/ConfigBuilder.scala
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@@ -104,7 +104,7 @@ private[spark] class TypedConfigBuilder[T](
/** Checks if the user-provided value for the config matches the validator.
*/
def checkValue(validator: T => Boolean, errorMsg: String):
TypedConfigBuilder[T] = {
transform { v =>
- if (!validator(v)) throw new IllegalArgumentException(errorMsg)
+ if (!validator(v)) throw new IllegalArgumentException(s"'$v' is invalid
because: $errorMsg")
Review comment:
```suggestion
if (!validator(v)) throw new IllegalArgumentException(s"'$v' in
${parent.key} is invalid. $errorMsg")
```
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