Ngone51 commented on a change in pull request #27395: [SPARK-30667][CORE] Add 
allGather method to BarrierTaskContext
URL: https://github.com/apache/spark/pull/27395#discussion_r378666469
 
 

 ##########
 File path: 
core/src/test/scala/org/apache/spark/scheduler/BarrierTaskContextSuite.scala
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 @@ -52,6 +54,27 @@ class BarrierTaskContextSuite extends SparkFunSuite with 
LocalSparkContext {
     assert(times.max - times.min <= 1000)
   }
 
+  test("share messages with allGather() call") {
 
 Review comment:
   Just want to make sure that different barrier methods can work well  in the 
same stage, since they'll share some data in `BarrierCoordinator`.

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