dongjoon-hyun commented on a change in pull request #29235:
URL: https://github.com/apache/spark/pull/29235#discussion_r460427033
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File path: core/src/test/scala/org/apache/spark/rdd/RDDSuite.scala
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@@ -237,10 +237,8 @@ class RDDSuite extends SparkFunSuite with
SharedSparkContext with Eventually {
test("aggregate") {
val pairs = sc.makeRDD(Seq(("a", 1), ("b", 2), ("a", 2), ("c", 5), ("a",
3)))
- type StringMap = HashMap[String, Int]
- val emptyMap = new StringMap {
- override def default(key: String): Int = 0
- }
+ type StringMap = scala.collection.mutable.Map[String, Int]
Review comment:
`withDefaultValue` returns a inner class extending `mutable.Map`. So, we
should use `Map` for `aggregate`.
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