Github user kayousterhout commented on a diff in the pull request:
https://github.com/apache/spark/pull/12060#discussion_r63443356
--- Diff: core/src/main/scala/org/apache/spark/scheduler/DAGScheduler.scala
---
@@ -752,23 +751,20 @@ class DAGScheduler(
submitStage(stage)
}
}
- submitWaitingStages()
}
/**
* Check for waiting stages which are now eligible for resubmission.
- * Ordinarily run on every iteration of the event loop.
+ * Ordinarily run after the parent stage completed successfully.
*/
- private def submitWaitingStages() {
- // TODO: We might want to run this less often, when we are sure that
something has become
- // runnable that wasn't before.
+ private def submitWaitingChildStages(parent: Stage) {
logTrace("Checking for newly runnable parent stages")
--- End diff --
Can you update this to say s"Checking if any dependencies of $parent are
now runnable"
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