Github user squito commented on a diff in the pull request: https://github.com/apache/spark/pull/22288#discussion_r216724373 --- Diff: core/src/main/scala/org/apache/spark/scheduler/TaskSchedulerImpl.scala --- @@ -414,9 +425,48 @@ 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 the taskSet is unschedulable we kill an existing blacklisted executor/s and + // kick off an abortTimer which after waiting will abort the taskSet if we were + // unable to schedule any task from the taskSet. + // Note: We keep a track of schedulability on a per taskSet basis rather than on a + // per task basis. + val executor = hostToExecutors.valuesIterator.next().iterator.next() + logDebug("Killing executor because of task unschedulability: " + executor) --- End diff -- I think this should probably be logInfo (unless there is something else similar at INFO level elsewhere)
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