Github user rxin commented on a diff in the pull request:
https://github.com/apache/spark/pull/13717#discussion_r67420999
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/execution/python/ExtractPythonUDFs.scala
---
@@ -132,7 +132,7 @@ private[spark] object ExtractPythonUDFs extends
Rule[SparkPlan] {
val validUdfs = udfs.filter { case udf =>
// Check to make sure that the UDF can be evaluated with only
the input of this child.
udf.references.subsetOf(child.outputSet)
- }
+ }.toArray // force the iterator to an array, that can't be
serialized in Scala 2.10
--- End diff --
do u mean the iterator couldn't have been serialized in scala 2.10?
maybe say "Turn it into an array since iterators cannot be serialized in
Scala 2.10"
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