xuanyuanking commented on a change in pull request #24350: [SPARK-27348][Core]
HeartbeatReceiver should remove lost executors from
CoarseGrainedSchedulerBackend
URL: https://github.com/apache/spark/pull/24350#discussion_r276720394
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File path: core/src/main/scala/org/apache/spark/HeartbeatReceiver.scala
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@@ -205,6 +207,13 @@ private[spark] class HeartbeatReceiver(sc: SparkContext,
clock: Clock)
// Note: we want to get an executor back after expiring this one,
// so do not simply call `sc.killExecutor` here (SPARK-8119)
sc.killAndReplaceExecutor(executorId)
+ // In case of the executors which are not gracefully shut down, we
should remove
+ // lost executors from CoarseGrainedSchedulerBackend manually here
(SPARK-27348)
+ sc.schedulerBackend match {
+ case backend: CoarseGrainedSchedulerBackend =>
Review comment:
For all 3 kinds of SchedulerBackend, both `CoarseGrainedSchedulerBackend`
and `StandaloneSchedulerBackend` can be handled here, the last one,
`LocalSchedulerBackend`, is unnecessary because this PR wants to fix the
problem of clearing lost executor depends on `onDisconnect` in distributed
scheduler backend, while `LocalSchedulerBackend` has no such problem. Please
correct me if I'm wrong.
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