Github user vanzin commented on a diff in the pull request:
https://github.com/apache/spark/pull/4688#discussion_r25545466
--- Diff:
core/src/main/scala/org/apache/spark/scheduler/cluster/CoarseGrainedSchedulerBackend.scala
---
@@ -71,6 +72,16 @@ class CoarseGrainedSchedulerBackend(scheduler:
TaskSchedulerImpl, val actorSyste
// Executors we have requested the cluster manager to kill that have not
died yet
private val executorsPendingToRemove = new HashSet[String]
+ /**
+ * Send new credentials to executors. This is the method that is called
when the scheduled
+ * login completes, so the new credentials can be sent to the executors.
+ * @param credentials
+ */
+ def sendNewCredentialsToExecutors(credentials: SerializableBuffer): Unit
= {
+ // We don't care about the reply, so going to deadLetters is fine.
--- End diff --
BTW, on top of that, the executor should not service any tasks before it
downloads the credentials, so it either should request them before registering,
or some other form of blocking should be added.
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