Github user rxin commented on a diff in the pull request:
https://github.com/apache/spark/pull/1009#discussion_r13688732
--- Diff: core/src/main/scala/org/apache/spark/rdd/ShuffledRDD.scala ---
@@ -42,10 +42,11 @@ class ShuffledRDD[K, V, P <: Product2[K, V] : ClassTag](
part: Partitioner)
extends RDD[P](prev.context, Nil) {
- private var serializer: Serializer = null
+ private var serializer: Option[Serializer] = None
+ /** Set a serializer for this RDD's shuffle, or null to use the default
(spark.serializer) */
def setSerializer(serializer: Serializer): ShuffledRDD[K, V, P] = {
- this.serializer = serializer
+ this.serializer = Option(serializer)
--- End diff --
Not if serializer is null
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