Github user zsxwing commented on a diff in the pull request:
https://github.com/apache/spark/pull/11455#discussion_r55863392
--- Diff: core/src/main/scala/org/apache/spark/deploy/master/Master.scala
---
@@ -368,6 +368,30 @@ private[deploy] class Master(
if (canCompleteRecovery) { completeRecovery() }
}
+ case WorkerLatestState(workerId, executors, driverIds) =>
+ idToWorker.get(workerId) match {
+ case Some(worker) =>
+ for (exec <- executors) {
+ val executorMatches = worker.executors.exists {
+ case (_, e) => e.application.id == exec.appId && e.id ==
exec.execId
+ }
+ if (!executorMatches) {
+ // master doesn't recognize this executor. So just tell
worker to kill it.
+ worker.endpoint.send(KillExecutor(masterUrl, exec.appId,
exec.execId))
+ }
+ }
+
+ for (driverId <- driverIds) {
+ val driverMatches = worker.drivers.exists { case (id, _) => id
== driverId }
+ if (!driverMatches) {
+ // master doesn't recognize this driver. So just tell worker
to kill it.
+ worker.endpoint.send(KillDriver(driverId))
--- End diff --
I don't get it. Here just compare them with the executors and drivers of a
worker stored in the master. If we find any mismatch, just kill it.
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