Github user Ngone51 commented on a diff in the pull request: https://github.com/apache/spark/pull/22288#discussion_r214719743 --- Diff: core/src/main/scala/org/apache/spark/scheduler/TaskSchedulerImpl.scala --- @@ -414,9 +425,54 @@ private[spark] class TaskSchedulerImpl( launchedAnyTask |= launchedTaskAtCurrentMaxLocality } while (launchedTaskAtCurrentMaxLocality) } + if (!launchedAnyTask) { - taskSet.abortIfCompletelyBlacklisted(hostToExecutors) - } + taskSet.getCompletelyBlacklistedTaskIfAny(hostToExecutors) match { + case taskIndex: Some[Int] => // Returns the taskIndex which was unschedulable + if (conf.getBoolean("spark.dynamicAllocation.enabled", false)) { + // If the taskSet is unschedulable we kill the existing blacklisted executor/s and + // kick off an abortTimer which after waiting will abort the taskSet if we were + // unable to get new executors and couldn't schedule a task from the taskSet. + // Note: We keep a track of schedulability on a per taskSet basis rather than on a + // per task basis. + if (!unschedulableTaskSetToExpiryTime.contains(taskSet)) { + hostToExecutors.valuesIterator.foreach(executors => executors.foreach({ + executor => + logDebug("Killing executor because of task unschedulability: " + executor) + blacklistTrackerOpt.foreach(blt => blt.killBlacklistedExecutor(executor)) --- End diff -- Seriously? You killed all executors ? What if other taskSets' tasks are running on them ? BTW, if you want to refresh executors, you have to enable `spark.blacklist.killBlacklistedExecutors` also.
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