Github user rdblue commented on a diff in the pull request:
https://github.com/apache/spark/pull/15847#discussion_r87619721
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/mathExpressions.scala
---
@@ -36,7 +36,7 @@ import org.apache.spark.unsafe.types.UTF8String
* @param name The short name of the function
*/
abstract class LeafMathExpression(c: Double, name: String)
- extends LeafExpression with CodegenFallback {
+ extends LeafExpression with CodegenFallback with Serializable {
--- End diff --
The case classes are serializable, but the superclass must be also. If this
isn't present, then no default constructor is created for this abstract class
and its children fail when they are deserialized.
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