Github user mccheah commented on a diff in the pull request:
https://github.com/apache/spark/pull/4634#discussion_r26704396
--- Diff: core/src/main/scala/org/apache/spark/api/java/JavaPairRDD.scala
---
@@ -233,18 +235,44 @@ class JavaPairRDD[K, V](val rdd: RDD[(K, V)])
def combineByKey[C](createCombiner: JFunction[V, C],
mergeValue: JFunction2[C, V, C],
mergeCombiners: JFunction2[C, C, C],
- partitioner: Partitioner): JavaPairRDD[K, C] = {
+ partitioner: Partitioner,
+ mapSideCombine: Boolean,
+ serializer: Serializer): JavaPairRDD[K, C] = {
--- End diff --
It's weird because we don't specify the serializer in the docs for
PairRDDFunctions.
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