Github user viirya commented on a diff in the pull request: https://github.com/apache/spark/pull/21291#discussion_r188131133 --- Diff: sql/core/src/test/scala/org/apache/spark/sql/ConfigBehaviorSuite.scala --- @@ -39,7 +39,9 @@ class ConfigBehaviorSuite extends QueryTest with SharedSQLContext { def computeChiSquareTest(): Double = { val n = 10000 // Trigger a sort - val data = spark.range(0, n, 1, 1).sort('id.desc) + // Range has range partitioning in its output now. To have a range shuffle, we + // need to run a repartition first. + val data = spark.range(0, n, 1, 1).repartition(10).sort('id.desc) --- End diff -- This test requires a range shuffle. Previously `range` has unknown output partitioning/ordering, so there is a range shuffle inserted before `sort`. For now `range` has an ordered output, so planner doesn't insert the shuffle we need here.
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