Github user mridulm commented on a diff in the pull request:
https://github.com/apache/spark/pull/15612#discussion_r84742854
--- Diff: core/src/main/scala/org/apache/spark/rdd/RDD.scala ---
@@ -848,39 +849,44 @@ abstract class RDD[T: ClassTag](
* of elements in each partition.
*/
def zipPartitions[B: ClassTag, V: ClassTag]
- (rdd2: RDD[B], preservesPartitioning: Boolean)
+ (rdd2: RDD[B], preservesPartitioning: Boolean, preferredLocationRDD:
RDD[_])
--- End diff --
Make preferredLocationRDD and Option.
Also can you please add some documentation about it ?
Like what happens when it is specified, what happens when it is not ?
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