[GitHub] spark pull request #17868: [SPARK-20607][CORE]Add new unit tests to ShuffleS...

[srowen <gi...@git.apache.org>]

Github user srowen commented on a diff in the pull request:

    https://github.com/apache/spark/pull/17868#discussion_r114954827
  
    --- Diff: core/src/test/scala/org/apache/spark/ShuffleSuite.scala ---
    @@ -271,25 +271,49 @@ abstract class ShuffleSuite extends SparkFunSuite with Matchers with LocalSparkC
       test("[SPARK-4085] rerun map stage if reduce stage cannot find its local shuffle file") {
         val myConf = conf.clone().set("spark.test.noStageRetry", "false")
         sc = new SparkContext("local", "test", myConf)
    -    val rdd = sc.parallelize(1 to 10, 2).map((_, 1)).reduceByKey(_ + _)
    +    val rdd = sc.parallelize(1 to 10, 1).map((_, 1)).reduceByKey(_ + _)
    --- End diff --
    
    Why this change?


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