q2w commented on a change in pull request #32766:
URL: https://github.com/apache/spark/pull/32766#discussion_r646269540
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File path:
core/src/main/scala/org/apache/spark/scheduler/cluster/CoarseGrainedSchedulerBackend.scala
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@@ -519,10 +558,7 @@ class CoarseGrainedSchedulerBackend(scheduler:
TaskSchedulerImpl, val rpcEnv: Rp
scheduler.sc.env.blockManager.master.decommissionBlockManagers(executorsToDecommission)
if (!triggeredByExecutor) {
- executorsToDecommission.foreach { executorId =>
- logInfo(s"Notify executor $executorId to decommissioning.")
- executorDataMap(executorId).executorEndpoint.send(DecommissionExecutor)
- }
Review comment:
@Ngone51 Network overload will come from simultaneous block migration if
we decommission large chunk of executors at once. If we do it in batches we
limit migration of blocks at once.
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