linzebing commented on a change in pull request #27223:
[SPARK-30511][SPARK-28403][CORE] Don't treat failed/killed speculative tasks as
pending in ExecutorAllocationManager
URL: https://github.com/apache/spark/pull/27223#discussion_r373924312
##########
File path: core/src/main/scala/org/apache/spark/ExecutorAllocationManager.scala
##########
@@ -614,18 +615,30 @@ private[spark] class ExecutorAllocationManager(
stageAttemptToNumRunningTask -= stageAttempt
}
}
- // If the task failed, we expect it to be resubmitted later. To ensure
we have
- // enough resources to run the resubmitted task, we need to mark the
scheduler
- // as backlogged again if it's not already marked as such (SPARK-8366)
- if (taskEnd.reason != Success) {
- if (totalPendingTasks() == 0) {
- allocationManager.onSchedulerBacklogged()
- }
- if (taskEnd.taskInfo.speculative) {
- stageAttemptToSpeculativeTaskIndices.get(stageAttempt).foreach
{_.remove(taskIndex)}
- } else {
- stageAttemptToTaskIndices.get(stageAttempt).foreach
{_.remove(taskIndex)}
- }
+
+ if (taskEnd.taskInfo.speculative) {
+ stageAttemptToSpeculativeTaskIndices.get(stageAttempt).foreach
{_.remove{taskIndex}}
+ stageAttemptToNumSpeculativeTasks(stageAttempt) -= 1
+ }
+
+ taskEnd.reason match {
+ case Success | _: TaskKilled =>
+ case _ =>
+ if (totalPendingTasks() == 0) {
+ // If the task failed (not intentionally killed), we expect it
to be resubmitted
+ // later. To ensure we have enough resources to run the
resubmitted task, we need to
+ // mark the scheduler as backlogged again if it's not already
marked as such
+ // (SPARK-8366)
+ allocationManager.onSchedulerBacklogged()
Review comment:
As explained in the comment, if a task is intentionally killed, we should
not mark the scheduler as backlogged.
If a speculative task fails, while it will not be directly resubmitted, a
new speculative task will be launched in next speculation cycle. So it's OK for
us to mark the scheduler as backlogged in this case.
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