Github user andrewor14 commented on a diff in the pull request: https://github.com/apache/spark/pull/3483#discussion_r20955275 --- Diff: core/src/main/scala/org/apache/spark/scheduler/cluster/CoarseGrainedSchedulerBackend.scala --- @@ -127,7 +127,14 @@ class CoarseGrainedSchedulerBackend(scheduler: TaskSchedulerImpl, val actorSyste makeOffers() case KillTask(taskId, executorId, interruptThread) => - executorDataMap(executorId).executorActor ! KillTask(taskId, executorId, interruptThread) + executorDataMap.get(executorId) match { + case Some(executorInfo) => + executorInfo.executorActor ! KillTask(taskId, executorId, interruptThread) + case None => + // Ignoring the task kill since the executor is not registered. + logWarning(s"Ignored task kill $taskId $executorId" + + " for unknown executor $sender with ID $executorId") --- End diff -- This message is unclear. How about just ``` "Attempted to kill task $taskId for unknown executor $executorId. Ignoring." ```
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