Github user cloud-fan commented on a diff in the pull request:
https://github.com/apache/spark/pull/22284#discussion_r214276505
--- Diff:
sql/core/src/test/scala/org/apache/spark/sql/execution/PlannerSuite.scala ---
@@ -704,6 +704,23 @@ class PlannerSuite extends SharedSQLContext {
df.queryExecution.executedPlan.execute()
}
+ test("SPARK-25278: physical nodes should be different instances for same
logical nodes") {
--- End diff --
can we demonstrate the metrics problem in this test? I think that's a real
bug.
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