Github user yangyangyyy commented on a diff in the pull request:
https://github.com/apache/spark/pull/17697#discussion_r112805342
--- Diff:
mllib/src/test/scala/org/apache/spark/mllib/rdd/MLPairRDDFunctionsSuite.scala
---
@@ -33,4 +33,16 @@ class MLPairRDDFunctionsSuite extends SparkFunSuite with
MLlibTestSparkContext {
assert(topMap(3) === Array(7, 5, 2))
assert(topMap(5) === Array(1))
}
+
+ test("topByKeyUsingBuckets") {
--- End diff --
yes it's supposed to be the same. unfortunately I can't see a way to verify
the number of reducers being actually used. it's not a correctness issue
though, so I think verifying manually should be enough ---- I did verify on
spark UI that it's invoking the intended reducer count
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