Github user vanzin commented on a diff in the pull request:
https://github.com/apache/spark/pull/9963#discussion_r47125472
--- Diff:
yarn/src/main/scala/org/apache/spark/scheduler/cluster/YarnSchedulerBackend.scala
---
@@ -225,6 +240,13 @@ private[spark] abstract class YarnSchedulerBackend(
case RegisterClusterManager(am) =>
logInfo(s"ApplicationMaster registered as $am")
amEndpoint = Option(am)
+ if (!shouldResetOnAmRegister) {
+ shouldResetOnAmRegister = true
+ } else {
+ // AM is already registered before, this potentially means that
AM is failed and
+ // re-registered after the failure. This will only be happened
in yarn-client mode.
--- End diff --
nit: "this can only happen".
I'll fix during merge.
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