Github user srowen commented on a diff in the pull request:
https://github.com/apache/spark/pull/7020#discussion_r33293835
--- Diff: core/src/main/scala/org/apache/spark/Partitioner.scala ---
@@ -57,7 +57,7 @@ object Partitioner {
def defaultPartitioner(rdd: RDD[_], others: RDD[_]*): Partitioner = {
val bySize = (Seq(rdd) ++ others).sortBy(_.partitions.size).reverse
for (r <- bySize if r.partitioner.isDefined) {
- return r.partitioner.get
+ if (r.partitions.size > 0) return r.partitioner.get
--- End diff --
Put this in the guard condition in the `for`? I think you can write
`nonEmpty`?
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