Github user li-zhihui commented on a diff in the pull request:
https://github.com/apache/spark/pull/900#discussion_r14225319
--- Diff:
core/src/main/scala/org/apache/spark/scheduler/cluster/CoarseGrainedSchedulerBackend.scala
---
@@ -244,6 +255,17 @@ class CoarseGrainedSchedulerBackend(scheduler:
TaskSchedulerImpl, actorSystem: A
throw new SparkException("Error notifying standalone scheduler's
driver actor", e)
}
}
+
+ override def isReady(): Boolean = {
+ if (ready) {
--- End diff --
@kayousterhout Now, the method is called per submitting tasks, it can
return quickly by saving the value of "ready".
If we moved waitBackendReady to BackendScheduler.start, the method will be
called only once, and we should follow the idea.
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