Github user vanzin commented on a diff in the pull request:
https://github.com/apache/spark/pull/6750#discussion_r33708206
--- Diff:
core/src/test/scala/org/apache/spark/scheduler/TaskSchedulerImplSuite.scala ---
@@ -128,4 +128,20 @@ class TaskSchedulerImplSuite extends SparkFunSuite
with LocalSparkContext with L
assert(taskDescriptions.map(_.executorId) === Seq("executor0"))
}
+ test("refuse to schedule concurrent attempts for the same stage
(SPARK-8103)") {
+ sc = new SparkContext("local", "TaskSchedulerImplSuite")
+ val taskScheduler = new TaskSchedulerImpl(sc)
+ taskScheduler.initialize(new FakeSchedulerBackend)
+ // Need to initialize a DAGScheduler for the taskScheduler to use for
callbacks.
+ val dagScheduler = new DAGScheduler(sc, taskScheduler) {
+ override def taskStarted(task: Task[_], taskInfo: TaskInfo) {}
+ override def executorAdded(execId: String, host: String) {}
+ }
+ taskScheduler.setDAGScheduler(dagScheduler)
+ val attempt1 = new TaskSet(Array(new FakeTask(0)), 0, 0, 0, null)
+ val attempt2 = new TaskSet(Array(new FakeTask(0)), 0, 1, 0, null)
+ taskScheduler.submitTasks(attempt1)
+ intercept[SparkIllegalStateException] {
taskScheduler.submitTasks(attempt2)}
--- End diff --
nit: missing space before `}`
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