Github user rxin commented on a diff in the pull request:
https://github.com/apache/spark/pull/5959#discussion_r29826048
--- Diff: core/src/main/scala/org/apache/spark/rdd/RDD.scala ---
@@ -741,9 +741,10 @@ abstract class RDD[T: ClassTag](
def mapWith[A, U: ClassTag]
(constructA: Int => A, preservesPartitioning: Boolean = false)
(f: (T, A) => U): RDD[U] = withScope {
+ val cleanF = sc.clean(f)
mapPartitionsWithIndex((index, iter) => {
val a = constructA(index)
- iter.map(t => f(t, a))
+ iter.map(t => cleanF(t, a))
--- End diff --
my understanding is that mappartitionsWithIndex cleans, and thus anything
in that is cleaned. maybe it's an incorrect assumption. cc @andrewor14?
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