[GitHub] [spark] Ngone51 commented on a diff in pull request #38702: [SPARK-41187][CORE] LiveExecutor MemoryLeak in AppStatusListener when ExecutorLost happen
Ngone51 commented on code in PR #38702:
URL: https://github.com/apache/spark/pull/38702#discussion_r1044581470
##
core/src/main/scala/org/apache/spark/status/AppStatusListener.scala:
##
@@ -674,22 +674,30 @@ private[spark] class AppStatusListener(
delta
}.orNull
-val (completedDelta, failedDelta, killedDelta) = event.reason match {
+// SPARK-41187: For `SparkListenerTaskEnd` with `Resubmitted` reason,
which is raised by
+// executor lost, it can lead to negative `LiveStage.activeTasks` since
there's no
+// corresponding `SparkListenerTaskStart` event for each of them. The
negative activeTasks
+// will make the stage always remains in the live stage list as it can
never meet the
+// condition activeTasks == 0. This in turn causes the dead executor to
never be retained
+// if that live stage's submissionTime is less than the dead executor's
removeTime.
+val (completedDelta, failedDelta, killedDelta, activeTasksDelta) =
event.reason match {
Review Comment:
nit:
```suggestion
val (completedDelta, failedDelta, killedDelta, activeDelta) =
event.reason match {
```
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[GitHub] [spark] Ngone51 commented on a diff in pull request #38702: [SPARK-41187][CORE] LiveExecutor MemoryLeak in AppStatusListener when ExecutorLost happen
Ngone51 commented on code in PR #38702:
URL: https://github.com/apache/spark/pull/38702#discussion_r1044071110
##
core/src/test/scala/org/apache/spark/status/AppStatusListenerSuite.scala:
##
@@ -1849,6 +1849,68 @@ abstract class AppStatusListenerSuite extends
SparkFunSuite with BeforeAndAfter
checkInfoPopulated(listener, logUrlMap, processId)
}
+ test(s"SPARK-41187: Stage should be removed from liveStages to avoid
deadExecutors accumulated") {
+
+val listener = new AppStatusListener(store, conf, true)
+
+listener.onExecutorAdded(createExecutorAddedEvent(1))
+listener.onExecutorAdded(createExecutorAddedEvent(2))
+val stage = new StageInfo(1, 0, "stage", 4, Nil, Nil, "details",
+ resourceProfileId = ResourceProfile.DEFAULT_RESOURCE_PROFILE_ID)
+listener.onJobStart(SparkListenerJobStart(1, time, Seq(stage), null))
+
+time += 1
+stage.submissionTime = Some(time)
+listener.onStageSubmitted(SparkListenerStageSubmitted(stage, new
Properties()))
+
+val tasks = createTasks(2, Array("1", "2"))
+tasks.foreach { task =>
+ listener.onTaskStart(SparkListenerTaskStart(stage.stageId,
stage.attemptNumber, task))
+}
+
+time += 1
+tasks(0).markFinished(TaskState.FINISHED, time)
+listener.onTaskEnd(SparkListenerTaskEnd(stage.stageId,
stage.attemptNumber, "taskType",
+ Success, tasks(0), new ExecutorMetrics, null))
+
+// executor lost, success task will be resubmitted
+time += 1
+listener.onTaskEnd(SparkListenerTaskEnd(stage.stageId,
stage.attemptNumber, "taskType",
+ Resubmitted, tasks(0), new ExecutorMetrics, null))
+
+// executor lost, running task will be failed and rerun
+time += 1
+tasks(1).markFinished(TaskState.FAILED, time)
+listener.onTaskEnd(SparkListenerTaskEnd(stage.stageId,
stage.attemptNumber, "taskType",
+ ExecutorLostFailure("1", true, Some("Lost executor")), tasks(1), new
ExecutorMetrics,
+ null))
+
+tasks.foreach { task =>
+ listener.onTaskStart(SparkListenerTaskStart(stage.stageId,
stage.attemptNumber, task))
+}
+
+time += 1
+tasks(0).markFinished(TaskState.FINISHED, time)
+listener.onTaskEnd(SparkListenerTaskEnd(stage.stageId,
stage.attemptNumber, "taskType",
+ Success, tasks(0), new ExecutorMetrics, null))
+
+time += 1
+tasks(1).markFinished(TaskState.FINISHED, time)
+listener.onTaskEnd(SparkListenerTaskEnd(stage.stageId,
stage.attemptNumber, "taskType",
+ Success, tasks(0), new ExecutorMetrics, null))
Review Comment:
Shouldn't be `tasks(1)` here?
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[GitHub] [spark] Ngone51 commented on a diff in pull request #38702: [SPARK-41187][CORE] LiveExecutor MemoryLeak in AppStatusListener when ExecutorLost happen
Ngone51 commented on code in PR #38702:
URL: https://github.com/apache/spark/pull/38702#discussion_r1044064944
##
core/src/test/scala/org/apache/spark/status/AppStatusListenerSuite.scala:
##
@@ -1849,6 +1849,68 @@ abstract class AppStatusListenerSuite extends
SparkFunSuite with BeforeAndAfter
checkInfoPopulated(listener, logUrlMap, processId)
}
+ test(s"SPARK-41187: Stage should be removed from liveStages to avoid
deadExecutors accumulated") {
Review Comment:
```suggestion
test("SPARK-41187: Stage should be removed from liveStages to avoid
deadExecutors accumulated") {
```
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[GitHub] [spark] Ngone51 commented on a diff in pull request #38702: [SPARK-41187][CORE] LiveExecutor MemoryLeak in AppStatusListener when ExecutorLost happen
Ngone51 commented on code in PR #38702:
URL: https://github.com/apache/spark/pull/38702#discussion_r1044064601
##
core/src/main/scala/org/apache/spark/status/AppStatusListener.scala:
##
@@ -689,7 +689,15 @@ private[spark] class AppStatusListener(
if (metricsDelta != null) {
stage.metrics = LiveEntityHelpers.addMetrics(stage.metrics,
metricsDelta)
}
- stage.activeTasks -= 1
+ // SPARK-41187: For `SparkListenerTaskEnd` with `Resubmitted` reason,
which is raised by
+ // executor lost, it can lead to negative `LiveStage.activeTasks` since
there's no
+ // corresponding `SparkListenerTaskStart` event for each of them. The
negative activeTasks
+ // will make the stage always remains in the live stage list as it can
never meet the
+ // condition activeTasks == 0. This in turn causes the dead executor to
never be retained
+ // if that live stage's submissionTime is less than the dead executor's
removeTime.
+ if (event.reason != Resubmitted) {
Review Comment:
Can we extend xxxDelta above to include`Resubmitted` reason (e.g.,
activeTaskDelta) so we don't have to check `event.reason` every time below?
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[GitHub] [spark] Ngone51 commented on a diff in pull request #38702: [SPARK-41187][CORE] LiveExecutor MemoryLeak in AppStatusListener when ExecutorLost happen
Ngone51 commented on code in PR #38702:
URL: https://github.com/apache/spark/pull/38702#discussion_r1040532427
##
core/src/main/scala/org/apache/spark/status/AppStatusListener.scala:
##
@@ -645,8 +645,11 @@ private[spark] class AppStatusListener(
}
override def onTaskEnd(event: SparkListenerTaskEnd): Unit = {
-// TODO: can this really happen?
-if (event.taskInfo == null) {
+// TODO: can taskInfo null really happen?
+// For resubmitted tasks caused by ExecutorLost, the SparkListenerTaskEnd
is useless and
+// will make activeTask in stage to be negative, this will cause stage not
be removed in
+// liveStages, and finally cause executor not removed in deadExecutors
+if (event.taskInfo == null || event.reason == Resubmitted) {
Review Comment:
> Can the change not simply be limited to...
Ok..if our target is to only be able to remove the dead executors, I think
this's good enough. But if we also want to correct the metrics, it's not enough.
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[GitHub] [spark] Ngone51 commented on a diff in pull request #38702: [SPARK-41187][CORE] LiveExecutor MemoryLeak in AppStatusListener when ExecutorLost happen
Ngone51 commented on code in PR #38702:
URL: https://github.com/apache/spark/pull/38702#discussion_r1040350789
##
core/src/main/scala/org/apache/spark/status/AppStatusListener.scala:
##
@@ -645,8 +645,11 @@ private[spark] class AppStatusListener(
}
override def onTaskEnd(event: SparkListenerTaskEnd): Unit = {
-// TODO: can this really happen?
-if (event.taskInfo == null) {
+// TODO: can taskInfo null really happen?
+// For resubmitted tasks caused by ExecutorLost, the SparkListenerTaskEnd
is useless and
+// will make activeTask in stage to be negative, this will cause stage not
be removed in
+// liveStages, and finally cause executor not removed in deadExecutors
+if (event.taskInfo == null || event.reason == Resubmitted) {
Review Comment:
@wineternity Thanks for the detailed analysis. Seems like the only metric
that the `Resubmmitted` task end event could affect is the failed/completed
tasks counters. And other metrics like executor summary, and shuffle read/write
metrics are duplicated. So I tend to agree to recognize the `Resubmmitted` task
end event as a signal rather than a real task end event.
@mridulm WDYT?
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[GitHub] [spark] Ngone51 commented on a diff in pull request #38702: [SPARK-41187][CORE] LiveExecutor MemoryLeak in AppStatusListener when ExecutorLost happen
Ngone51 commented on code in PR #38702:
URL: https://github.com/apache/spark/pull/38702#discussion_r1035883778
##
core/src/main/scala/org/apache/spark/status/AppStatusListener.scala:
##
@@ -645,8 +645,15 @@ private[spark] class AppStatusListener(
}
override def onTaskEnd(event: SparkListenerTaskEnd): Unit = {
-// TODO: can this really happen?
-if (event.taskInfo == null) {
+// TODO: can taskInfo null really happen?
Review Comment:
Yea. I checked. Null taskInfo is not possible.
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[GitHub] [spark] Ngone51 commented on a diff in pull request #38702: [SPARK-41187][CORE] LiveExecutor MemoryLeak in AppStatusListener when ExecutorLost happen
Ngone51 commented on code in PR #38702:
URL: https://github.com/apache/spark/pull/38702#discussion_r1035472239
##
core/src/main/scala/org/apache/spark/status/AppStatusListener.scala:
##
@@ -645,8 +645,15 @@ private[spark] class AppStatusListener(
}
override def onTaskEnd(event: SparkListenerTaskEnd): Unit = {
-// TODO: can this really happen?
-if (event.taskInfo == null) {
+// TODO: can taskInfo null really happen?
+// SPARK-41187: For `SparkListenerTaskEnd` with `Resubmitted` reason,
which is raised by executor lost,
+// it can lead to negative `LiveStage.activeTasks` since there's no
corresponding `SparkListenerTaskStart`
+// event for each of them. The negative activeTasks will make the stage
always remains in the live stage list
+// as it can never meet the condition activeTasks == 0. This in turn
causes the dead executor to never be
+// retained if that live stage's submissionTime is less than the dead
executor's removeTime( see
Review Comment:
nit:
```suggestion
// cleaned up if that live stage's submissionTime is less than the dead
executor's removeTime( see
```
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[GitHub] [spark] Ngone51 commented on a diff in pull request #38702: [SPARK-41187][CORE] LiveExecutor MemoryLeak in AppStatusListener when ExecutorLost happen
Ngone51 commented on code in PR #38702:
URL: https://github.com/apache/spark/pull/38702#discussion_r1034655159
##
core/src/test/scala/org/apache/spark/status/AppStatusListenerSuite.scala:
##
@@ -1849,6 +1849,68 @@ abstract class AppStatusListenerSuite extends
SparkFunSuite with BeforeAndAfter
checkInfoPopulated(listener, logUrlMap, processId)
}
+ test(s"Stage should be removed from liveStages to avoid deadExecutors
accumulated") {
+
+val listener = new AppStatusListener(store, conf, true)
+
+listener.onExecutorAdded(createExecutorAddedEvent(1))
+listener.onExecutorAdded(createExecutorAddedEvent(2))
+val stage = new StageInfo(1, 0, "stage", 4, Nil, Nil, "details",
+ resourceProfileId = ResourceProfile.DEFAULT_RESOURCE_PROFILE_ID)
+listener.onJobStart(SparkListenerJobStart(1, time, Seq(stage), null))
+
+time += 1
+stage.submissionTime = Some(time)
+listener.onStageSubmitted(SparkListenerStageSubmitted(stage, new
Properties()))
+
+val tasks = createTasks(2, Array("1", "2"))
+tasks.foreach { task =>
+ listener.onTaskStart(SparkListenerTaskStart(stage.stageId,
stage.attemptNumber, task))
+}
+
+time += 1
+tasks(0).markFinished(TaskState.FINISHED, time)
+listener.onTaskEnd(SparkListenerTaskEnd(stage.stageId,
stage.attemptNumber, "taskType",
+ Success, tasks(0), new ExecutorMetrics, null))
+
+// executor lost, success task will be resubmitted
+time += 1
+listener.onTaskEnd(SparkListenerTaskEnd(stage.stageId,
stage.attemptNumber, "taskType",
+ Resubmitted, tasks(0), new ExecutorMetrics, null))
+
+// executor lost, running task will be failed and rerun
+time += 1
+tasks(1).markFinished(TaskState.FAILED, time)
+listener.onTaskEnd(SparkListenerTaskEnd(stage.stageId,
stage.attemptNumber, "taskType",
+ ExecutorLostFailure("1", true, Some("Lost executor")), tasks(1), new
ExecutorMetrics,
+ null))
+
+tasks.foreach { task =>
+ listener.onTaskStart(SparkListenerTaskStart(stage.stageId,
stage.attemptNumber, task))
+}
+
+time += 1
+tasks(0).markFinished(TaskState.FINISHED, time)
+listener.onTaskEnd(SparkListenerTaskEnd(stage.stageId,
stage.attemptNumber, "taskType",
+ Success, tasks(0), new ExecutorMetrics, null))
+
+time += 1
+tasks(1).markFinished(TaskState.FINISHED, time)
+listener.onTaskEnd(SparkListenerTaskEnd(stage.stageId,
stage.attemptNumber, "taskType",
+ Success, tasks(0), new ExecutorMetrics, null))
+
+listener.onStageCompleted(SparkListenerStageCompleted(stage))
+time += 1
+listener.onJobEnd(SparkListenerJobEnd(1, time, JobSucceeded ))
+
+time += 1
+listener.onExecutorRemoved(SparkListenerExecutorRemoved(time, "1", "Test"))
+time += 1
+listener.onExecutorRemoved(SparkListenerExecutorRemoved(time, "2", "Test"))
+
+assert( listener.deadExecutors.size === 0 )
Review Comment:
```suggestion
assert(listener.deadExecutors.size === 0)
```
##
core/src/test/scala/org/apache/spark/status/AppStatusListenerSuite.scala:
##
@@ -1849,6 +1849,68 @@ abstract class AppStatusListenerSuite extends
SparkFunSuite with BeforeAndAfter
checkInfoPopulated(listener, logUrlMap, processId)
}
+ test(s"Stage should be removed from liveStages to avoid deadExecutors
accumulated") {
Review Comment:
```suggestion
test(s"SPARK-41187: Stage should be removed from liveStages to avoid
deadExecutors accumulated") {
```
##
core/src/main/scala/org/apache/spark/status/AppStatusListener.scala:
##
@@ -645,8 +645,11 @@ private[spark] class AppStatusListener(
}
override def onTaskEnd(event: SparkListenerTaskEnd): Unit = {
-// TODO: can this really happen?
-if (event.taskInfo == null) {
+// TODO: can taskInfo null really happen?
+// For resubmitted tasks caused by ExecutorLost, the SparkListenerTaskEnd
is useless and
+// will make activeTask in stage to be negative, this will cause stage not
be removed in
+// liveStages, and finally cause executor not removed in deadExecutors
Review Comment:
```suggestion
// SPARK-41187: For `SparkListenerTaskEnd` with `Resubmitted` reason,
which is raised by executor lost,
// it can lead to negative `LiveStage.activeTasks` since there's no
corresponding `SparkListenerTaskStart`
// event for each of them. The negative activeTasks will make the stage
always remains in the live stage list
// as it can never meet the condition activeTasks == 0. This in turn
causes the dead executor to never be
// retained if that live stage's submissionTime is less than the dead
executor's removeTime( see
// isExecutorActiveForLiveStages). Since this kind of
`SparkListenerTaskEnd` is useless here, we simply
// ignore it.
```
##
core/src/test/scala/org/apache/spark/status/AppStatusListenerSuite.scala:
##
@@ -1849,6 +1849,68 @@
