Github user debasish83 commented on a diff in the pull request:
https://github.com/apache/spark/pull/5829#discussion_r29492705
--- Diff:
mllib/src/main/scala/org/apache/spark/mllib/rdd/MLPairRDDFunctions.scala ---
@@ -39,7 +39,7 @@ class MLPairRDDFunctions[K: ClassTag, V: ClassTag](self:
RDD[(K, V)]) extends Se
* @return an RDD that contains the top k values for each key
*/
def topByKey(num: Int)(implicit ord: Ordering[V]): RDD[(K, Array[V])] = {
- self.aggregateByKey(new BoundedPriorityQueue[V](num)(ord))(
+ self.aggregateByKey(new BoundedPriorityQueue[V](num)(ord.reverse))(
--- End diff --
I have to look closely into it tomorrow...I have been using topByKey
internally and did not remember seeing this bug...
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