Github user squito commented on a diff in the pull request:
https://github.com/apache/spark/pull/21758#discussion_r206682882
--- Diff: core/src/main/scala/org/apache/spark/scheduler/DAGScheduler.scala
---
@@ -1349,6 +1339,29 @@ class DAGScheduler(
s"longer running")
}
+ if (mapStage.rdd.isBarrier()) {
--- End diff --
this won't handle the case when the barrier stage is two shuffle stages
back, right? you might need to go back many stages when there is a fetch
failure.
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