Github user jinxing64 commented on a diff in the pull request:
https://github.com/apache/spark/pull/16867#discussion_r106340513
--- Diff:
core/src/test/scala/org/apache/spark/scheduler/TaskSetManagerSuite.scala ---
@@ -893,6 +893,7 @@ class TaskSetManagerSuite extends SparkFunSuite with
LocalSparkContext with Logg
val taskSet = FakeTask.createTaskSet(4)
// Set the speculation multiplier to be 0 so speculative tasks are
launched immediately
sc.conf.set("spark.speculation.multiplier", "0.0")
+ sc.conf.set("spark.speculation", "true")
--- End diff --
This should be set. Because the duration is inserted to `MedianHeap` only
when `spark.speculation`(e.g. If I remove this, `MedianHeap` will be empty when
call `checkSpeculatableTasks`).
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