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Posted to reviews@spark.apache.org by GitBox <gi...@apache.org> on 2020/05/27 04:06:09 UTC

[GitHub] [spark] beliefer opened a new pull request #28641: [SPARK-31824][CORE][TESTS] DAGSchedulerSuite: Improve and reuse completeShuffleMapStageSuccessfully

beliefer opened a new pull request #28641:
URL: https://github.com/apache/spark/pull/28641


   ### What changes were proposed in this pull request?
   `DAGSchedulerSuite `provides `completeShuffleMapStageSuccessfully `to make `ShuffleMapStage `successfully.
   But many test case uses complete directly as follows:
   `complete(taskSets(0), Seq((Success, makeMapStatus("hostA", 1))))`
   
   We need to improve `completeShuffleMapStageSuccessfully `and reuse it.
   `completeShuffleMapStageSuccessfully(0, 0, 1, Some(0), Seq("hostA"))`
   
   
   ### Why are the changes needed?
   Improve and reuse completeShuffleMapStageSuccessfully
   
   
   ### Does this PR introduce _any_ user-facing change?
    'No'.
   
   
   ### How was this patch tested?
   Jenkins test
   


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[GitHub] [spark] beliefer commented on pull request #28641: [SPARK-31824][CORE][TESTS] DAGSchedulerSuite: Improve and reuse completeShuffleMapStageSuccessfully

Posted by GitBox <gi...@apache.org>.
beliefer commented on pull request #28641:
URL: https://github.com/apache/spark/pull/28641#issuecomment-642721929


   retest this please


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[GitHub] [spark] SparkQA commented on pull request #28641: [SPARK-31824][CORE][TESTS] DAGSchedulerSuite: Improve and reuse completeShuffleMapStageSuccessfully

Posted by GitBox <gi...@apache.org>.
SparkQA commented on pull request #28641:
URL: https://github.com/apache/spark/pull/28641#issuecomment-643069579


   **[Test build #123879 has finished](https://amplab.cs.berkeley.edu/jenkins/job/SparkPullRequestBuilder/123879/testReport)** for PR 28641 at commit [`b14ac2d`](https://github.com/apache/spark/commit/b14ac2d5f40b0065da989ebc2fec289c0bb6be5a).
    * This patch **fails PySpark unit tests**.
    * This patch merges cleanly.
    * This patch adds no public classes.


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[GitHub] [spark] beliefer commented on a change in pull request #28641: [SPARK-31824][CORE][TESTS] DAGSchedulerSuite: Improve and reuse completeShuffleMapStageSuccessfully

Posted by GitBox <gi...@apache.org>.
beliefer commented on a change in pull request #28641:
URL: https://github.com/apache/spark/pull/28641#discussion_r435116220



##########
File path: core/src/test/scala/org/apache/spark/scheduler/DAGSchedulerSuite.scala
##########
@@ -889,16 +870,40 @@ class DAGSchedulerSuite extends SparkFunSuite with LocalSparkContext with TimeLi
    * @param stageId - The current stageId
    * @param attemptIdx - The current attempt count
    * @param numShufflePartitions - The number of partitions in the next stage
+   * @param taskSetOpt - The index of task set
+   * @param hostNames - Host on which each task in the task set is executed
+   * @param mapTaskIds - ID of each task in the task set
+   * @param execIds - ID of the executor in which each task in the task set is executed
    */
   private def completeShuffleMapStageSuccessfully(

Review comment:
        Only two test cases passed `execIds `. I will delete this parameter too.

##########
File path: core/src/test/scala/org/apache/spark/scheduler/DAGSchedulerSuite.scala
##########
@@ -889,16 +870,40 @@ class DAGSchedulerSuite extends SparkFunSuite with LocalSparkContext with TimeLi
    * @param stageId - The current stageId
    * @param attemptIdx - The current attempt count
    * @param numShufflePartitions - The number of partitions in the next stage
+   * @param taskSetOpt - The index of task set
+   * @param hostNames - Host on which each task in the task set is executed
+   * @param mapTaskIds - ID of each task in the task set
+   * @param execIds - ID of the executor in which each task in the task set is executed
    */
   private def completeShuffleMapStageSuccessfully(

Review comment:
        Only two test cases passed `execIds`. I will delete this parameter too.




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[GitHub] [spark] beliefer commented on pull request #28641: [SPARK-31824][CORE][TESTS] DAGSchedulerSuite: Improve and reuse completeShuffleMapStageSuccessfully

Posted by GitBox <gi...@apache.org>.
beliefer commented on pull request #28641:
URL: https://github.com/apache/spark/pull/28641#issuecomment-634381384


   cc @jiangxb1987 @Ngone51 


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Posted by GitBox <gi...@apache.org>.
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   **[Test build #123845 has finished](https://amplab.cs.berkeley.edu/jenkins/job/SparkPullRequestBuilder/123845/testReport)** for PR 28641 at commit [`03ff735`](https://github.com/apache/spark/commit/03ff73512c014ca6e087ea6f67f44b01f0e4f4ce).
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Posted by GitBox <gi...@apache.org>.
SparkQA commented on pull request #28641:
URL: https://github.com/apache/spark/pull/28641#issuecomment-644380608


   **[Test build #124071 has finished](https://amplab.cs.berkeley.edu/jenkins/job/SparkPullRequestBuilder/124071/testReport)** for PR 28641 at commit [`681d9e5`](https://github.com/apache/spark/commit/681d9e5d14800a171b97e6d73a02ae6f14eba19d).
    * This patch passes all tests.
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[GitHub] [spark] jiangxb1987 commented on a change in pull request #28641: [SPARK-31824][CORE][TESTS] DAGSchedulerSuite: Improve and reuse completeShuffleMapStageSuccessfully

Posted by GitBox <gi...@apache.org>.
jiangxb1987 commented on a change in pull request #28641:
URL: https://github.com/apache/spark/pull/28641#discussion_r438949977



##########
File path: core/src/test/scala/org/apache/spark/scheduler/DAGSchedulerSuite.scala
##########
@@ -889,16 +884,29 @@ class DAGSchedulerSuite extends SparkFunSuite with LocalSparkContext with TimeLi
    * @param stageId - The current stageId
    * @param attemptIdx - The current attempt count
    * @param numShufflePartitions - The number of partitions in the next stage
+   * @param hostNames - Host on which each task in the task set is executed
    */
   private def completeShuffleMapStageSuccessfully(
       stageId: Int,
       attemptIdx: Int,
-      numShufflePartitions: Int): Unit = {
-    val stageAttempt = taskSets.last
+      numShufflePartitions: Int,
+      hostNames: Seq[String] = Seq.empty[String]): Unit = {
+    def compareStageAttempt(taskSet: TaskSet): Boolean = {
+      taskSet.stageId == stageId && taskSet.stageAttemptId == attemptIdx
+    }
+
+    val stageAttemptOpt = taskSets.find(compareStageAttempt(_))
+    assert(stageAttemptOpt.isDefined)
+    val stageAttempt = stageAttemptOpt.get
     checkStageId(stageId, attemptIdx, stageAttempt)
     complete(stageAttempt, stageAttempt.tasks.zipWithIndex.map {
       case (task, idx) =>
-        (Success, makeMapStatus("host" + ('A' + idx).toChar, numShufflePartitions))
+        val hostName = if (idx < hostNames.size) {
+          hostNames(idx)
+        } else {
+          "host" + ('A' + idx).toChar

Review comment:
       nit: s"host${('A' + 2).toChar}"




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Posted by GitBox <gi...@apache.org>.
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    * This patch **fails due to an unknown error code, -9**.
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[GitHub] [spark] beliefer commented on a change in pull request #28641: [SPARK-31824][CORE][TESTS] DAGSchedulerSuite: Improve and reuse completeShuffleMapStageSuccessfully

Posted by GitBox <gi...@apache.org>.
beliefer commented on a change in pull request #28641:
URL: https://github.com/apache/spark/pull/28641#discussion_r435070559



##########
File path: core/src/test/scala/org/apache/spark/scheduler/DAGSchedulerSuite.scala
##########
@@ -889,16 +870,40 @@ class DAGSchedulerSuite extends SparkFunSuite with LocalSparkContext with TimeLi
    * @param stageId - The current stageId
    * @param attemptIdx - The current attempt count
    * @param numShufflePartitions - The number of partitions in the next stage
+   * @param taskSetOpt - The index of task set
+   * @param hostNames - Host on which each task in the task set is executed
+   * @param mapTaskIds - ID of each task in the task set
+   * @param execIds - ID of the executor in which each task in the task set is executed
    */
   private def completeShuffleMapStageSuccessfully(

Review comment:
       @Ngone51 Thanks! Only two test cases passed maptaskids. I will delete this parameter.




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beliefer commented on pull request #28641:
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   retest this please


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[GitHub] [spark] beliefer commented on a change in pull request #28641: [SPARK-31824][CORE][TESTS] DAGSchedulerSuite: Improve and reuse completeShuffleMapStageSuccessfully

Posted by GitBox <gi...@apache.org>.
beliefer commented on a change in pull request #28641:
URL: https://github.com/apache/spark/pull/28641#discussion_r439288152



##########
File path: core/src/test/scala/org/apache/spark/scheduler/DAGSchedulerSuite.scala
##########
@@ -889,16 +883,29 @@ class DAGSchedulerSuite extends SparkFunSuite with LocalSparkContext with TimeLi
    * @param stageId - The current stageId
    * @param attemptIdx - The current attempt count
    * @param numShufflePartitions - The number of partitions in the next stage
+   * @param hostNames - Host on which each task in the task set is executed
    */
   private def completeShuffleMapStageSuccessfully(
       stageId: Int,
       attemptIdx: Int,
-      numShufflePartitions: Int): Unit = {
-    val stageAttempt = taskSets.last
+      numShufflePartitions: Int,
+      hostNames: Seq[String] = Seq.empty[String]): Unit = {
+    def compareStageAttempt(taskSet: TaskSet): Boolean = {
+      taskSet.stageId == stageId && taskSet.stageAttemptId == attemptIdx
+    }
+
+    val stageAttemptOpt = taskSets.find(compareStageAttempt(_))
+    assert(stageAttemptOpt.isDefined)
+    val stageAttempt = stageAttemptOpt.get
     checkStageId(stageId, attemptIdx, stageAttempt)

Review comment:
       Yeah!




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beliefer commented on pull request #28641:
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   retest this please


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[GitHub] [spark] Ngone51 commented on a change in pull request #28641: [SPARK-31824][CORE][TESTS] DAGSchedulerSuite: Improve and reuse completeShuffleMapStageSuccessfully

Posted by GitBox <gi...@apache.org>.
Ngone51 commented on a change in pull request #28641:
URL: https://github.com/apache/spark/pull/28641#discussion_r439287499



##########
File path: core/src/test/scala/org/apache/spark/scheduler/DAGSchedulerSuite.scala
##########
@@ -889,16 +883,29 @@ class DAGSchedulerSuite extends SparkFunSuite with LocalSparkContext with TimeLi
    * @param stageId - The current stageId
    * @param attemptIdx - The current attempt count
    * @param numShufflePartitions - The number of partitions in the next stage
+   * @param hostNames - Host on which each task in the task set is executed
    */
   private def completeShuffleMapStageSuccessfully(
       stageId: Int,
       attemptIdx: Int,
-      numShufflePartitions: Int): Unit = {
-    val stageAttempt = taskSets.last
+      numShufflePartitions: Int,
+      hostNames: Seq[String] = Seq.empty[String]): Unit = {
+    def compareStageAttempt(taskSet: TaskSet): Boolean = {
+      taskSet.stageId == stageId && taskSet.stageAttemptId == attemptIdx
+    }
+
+    val stageAttemptOpt = taskSets.find(compareStageAttempt(_))
+    assert(stageAttemptOpt.isDefined)
+    val stageAttempt = stageAttemptOpt.get
     checkStageId(stageId, attemptIdx, stageAttempt)

Review comment:
       nit: This check is no longer needed because we've checked it in `compareStageAttempt`?




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[GitHub] [spark] SparkQA commented on pull request #28641: [SPARK-31824][CORE][TESTS] DAGSchedulerSuite: Improve and reuse completeShuffleMapStageSuccessfully

Posted by GitBox <gi...@apache.org>.
SparkQA commented on pull request #28641:
URL: https://github.com/apache/spark/pull/28641#issuecomment-643215886


   **[Test build #123903 has finished](https://amplab.cs.berkeley.edu/jenkins/job/SparkPullRequestBuilder/123903/testReport)** for PR 28641 at commit [`0a70316`](https://github.com/apache/spark/commit/0a70316f3127572f6061c32ad31ebb5dab462e12).
    * This patch **fails PySpark unit tests**.
    * This patch merges cleanly.
    * This patch adds no public classes.


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[GitHub] [spark] Ngone51 commented on a change in pull request #28641: [SPARK-31824][CORE][TESTS] DAGSchedulerSuite: Improve and reuse completeShuffleMapStageSuccessfully

Posted by GitBox <gi...@apache.org>.
Ngone51 commented on a change in pull request #28641:
URL: https://github.com/apache/spark/pull/28641#discussion_r433979634



##########
File path: core/src/test/scala/org/apache/spark/scheduler/DAGSchedulerSuite.scala
##########
@@ -889,16 +870,40 @@ class DAGSchedulerSuite extends SparkFunSuite with LocalSparkContext with TimeLi
    * @param stageId - The current stageId
    * @param attemptIdx - The current attempt count
    * @param numShufflePartitions - The number of partitions in the next stage
+   * @param taskSetOpt - The index of task set
+   * @param hostNames - Host on which each task in the task set is executed
+   * @param mapTaskIds - ID of each task in the task set
+   * @param execIds - ID of the executor in which each task in the task set is executed
    */
   private def completeShuffleMapStageSuccessfully(

Review comment:
       Well, there's another concern that while we're reusing the function in more places, it gets more complicated to use because of new arguments.




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[GitHub] [spark] Ngone51 commented on a change in pull request #28641: [SPARK-31824][CORE][TESTS] DAGSchedulerSuite: Improve and reuse completeShuffleMapStageSuccessfully

Posted by GitBox <gi...@apache.org>.
Ngone51 commented on a change in pull request #28641:
URL: https://github.com/apache/spark/pull/28641#discussion_r438200288



##########
File path: core/src/test/scala/org/apache/spark/scheduler/DAGSchedulerSuite.scala
##########
@@ -889,16 +884,27 @@ class DAGSchedulerSuite extends SparkFunSuite with LocalSparkContext with TimeLi
    * @param stageId - The current stageId
    * @param attemptIdx - The current attempt count
    * @param numShufflePartitions - The number of partitions in the next stage
+   * @param hostNames - Host on which each task in the task set is executed
    */
   private def completeShuffleMapStageSuccessfully(
       stageId: Int,
       attemptIdx: Int,
-      numShufflePartitions: Int): Unit = {
-    val stageAttempt = taskSets.last
+      numShufflePartitions: Int,
+      hostNames: Seq[String] = Seq.empty[String]): Unit = {
+    def compareStageAttempt(taskSet: TaskSet): Boolean = {
+      taskSet.stageId == stageId && taskSet.stageAttemptId == attemptIdx
+    }
+
+    val stageAttempt = taskSets.find(compareStageAttempt(_)).getOrElse(taskSets.last)

Review comment:
       When will `getOrElse(taskSets.last)` happen?




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[GitHub] [spark] jiangxb1987 commented on pull request #28641: [SPARK-31824][CORE][TESTS] DAGSchedulerSuite: Improve and reuse completeShuffleMapStageSuccessfully

Posted by GitBox <gi...@apache.org>.
jiangxb1987 commented on pull request #28641:
URL: https://github.com/apache/spark/pull/28641#issuecomment-644394716


   Thanks, merged to master!
   


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beliefer commented on pull request #28641:
URL: https://github.com/apache/spark/pull/28641#issuecomment-644481669


   @jiangxb1987 @Ngone51 Thanks for your help!


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[GitHub] [spark] beliefer commented on a change in pull request #28641: [SPARK-31824][CORE][TESTS] DAGSchedulerSuite: Improve and reuse completeShuffleMapStageSuccessfully

Posted by GitBox <gi...@apache.org>.
beliefer commented on a change in pull request #28641:
URL: https://github.com/apache/spark/pull/28641#discussion_r439177584



##########
File path: core/src/test/scala/org/apache/spark/scheduler/DAGSchedulerSuite.scala
##########
@@ -889,16 +884,29 @@ class DAGSchedulerSuite extends SparkFunSuite with LocalSparkContext with TimeLi
    * @param stageId - The current stageId
    * @param attemptIdx - The current attempt count
    * @param numShufflePartitions - The number of partitions in the next stage
+   * @param hostNames - Host on which each task in the task set is executed
    */
   private def completeShuffleMapStageSuccessfully(
       stageId: Int,
       attemptIdx: Int,
-      numShufflePartitions: Int): Unit = {
-    val stageAttempt = taskSets.last
+      numShufflePartitions: Int,
+      hostNames: Seq[String] = Seq.empty[String]): Unit = {
+    def compareStageAttempt(taskSet: TaskSet): Boolean = {
+      taskSet.stageId == stageId && taskSet.stageAttemptId == attemptIdx
+    }
+
+    val stageAttemptOpt = taskSets.find(compareStageAttempt(_))
+    assert(stageAttemptOpt.isDefined)
+    val stageAttempt = stageAttemptOpt.get
     checkStageId(stageId, attemptIdx, stageAttempt)
     complete(stageAttempt, stageAttempt.tasks.zipWithIndex.map {
       case (task, idx) =>
-        (Success, makeMapStatus("host" + ('A' + idx).toChar, numShufflePartitions))
+        val hostName = if (idx < hostNames.size) {
+          hostNames(idx)
+        } else {
+          "host" + ('A' + idx).toChar

Review comment:
       OK. I will change it.




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[GitHub] [spark] SparkQA commented on pull request #28641: [SPARK-31824][CORE][TESTS] DAGSchedulerSuite: Improve and reuse completeShuffleMapStageSuccessfully

Posted by GitBox <gi...@apache.org>.
SparkQA commented on pull request #28641:
URL: https://github.com/apache/spark/pull/28641#issuecomment-642430256


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    * This patch **fails Spark unit tests**.
    * This patch merges cleanly.
    * This patch adds no public classes.


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[GitHub] [spark] Ngone51 commented on a change in pull request #28641: [SPARK-31824][CORE][TESTS] DAGSchedulerSuite: Improve and reuse completeShuffleMapStageSuccessfully

Posted by GitBox <gi...@apache.org>.
Ngone51 commented on a change in pull request #28641:
URL: https://github.com/apache/spark/pull/28641#discussion_r433979634



##########
File path: core/src/test/scala/org/apache/spark/scheduler/DAGSchedulerSuite.scala
##########
@@ -889,16 +870,40 @@ class DAGSchedulerSuite extends SparkFunSuite with LocalSparkContext with TimeLi
    * @param stageId - The current stageId
    * @param attemptIdx - The current attempt count
    * @param numShufflePartitions - The number of partitions in the next stage
+   * @param taskSetOpt - The index of task set
+   * @param hostNames - Host on which each task in the task set is executed
+   * @param mapTaskIds - ID of each task in the task set
+   * @param execIds - ID of the executor in which each task in the task set is executed
    */
   private def completeShuffleMapStageSuccessfully(

Review comment:
       Well, there's another concern that while we're reusing the function in more places, it gets more complicated to use after adding many new arguments.




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[GitHub] [spark] beliefer commented on a change in pull request #28641: [SPARK-31824][CORE][TESTS] DAGSchedulerSuite: Improve and reuse completeShuffleMapStageSuccessfully

Posted by GitBox <gi...@apache.org>.
beliefer commented on a change in pull request #28641:
URL: https://github.com/apache/spark/pull/28641#discussion_r435119328



##########
File path: core/src/test/scala/org/apache/spark/scheduler/DAGSchedulerSuite.scala
##########
@@ -889,16 +870,40 @@ class DAGSchedulerSuite extends SparkFunSuite with LocalSparkContext with TimeLi
    * @param stageId - The current stageId
    * @param attemptIdx - The current attempt count
    * @param numShufflePartitions - The number of partitions in the next stage
+   * @param taskSetOpt - The index of task set
+   * @param hostNames - Host on which each task in the task set is executed
+   * @param mapTaskIds - ID of each task in the task set
+   * @param execIds - ID of the executor in which each task in the task set is executed
    */
   private def completeShuffleMapStageSuccessfully(
       stageId: Int,
       attemptIdx: Int,
-      numShufflePartitions: Int): Unit = {
-    val stageAttempt = taskSets.last
+      numShufflePartitions: Int,
+      taskSetOpt: Option[Int] = None,

Review comment:
       Good idea. I will improve it.




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[GitHub] [spark] jiangxb1987 commented on pull request #28641: [SPARK-31824][CORE][TESTS] DAGSchedulerSuite: Improve and reuse completeShuffleMapStageSuccessfully

Posted by GitBox <gi...@apache.org>.
jiangxb1987 commented on pull request #28641:
URL: https://github.com/apache/spark/pull/28641#issuecomment-644262390


   retest this please


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[GitHub] [spark] beliefer commented on a change in pull request #28641: [SPARK-31824][CORE][TESTS] DAGSchedulerSuite: Improve and reuse completeShuffleMapStageSuccessfully

Posted by GitBox <gi...@apache.org>.
beliefer commented on a change in pull request #28641:
URL: https://github.com/apache/spark/pull/28641#discussion_r438517228



##########
File path: core/src/test/scala/org/apache/spark/scheduler/DAGSchedulerSuite.scala
##########
@@ -889,16 +884,27 @@ class DAGSchedulerSuite extends SparkFunSuite with LocalSparkContext with TimeLi
    * @param stageId - The current stageId
    * @param attemptIdx - The current attempt count
    * @param numShufflePartitions - The number of partitions in the next stage
+   * @param hostNames - Host on which each task in the task set is executed
    */
   private def completeShuffleMapStageSuccessfully(
       stageId: Int,
       attemptIdx: Int,
-      numShufflePartitions: Int): Unit = {
-    val stageAttempt = taskSets.last
+      numShufflePartitions: Int,
+      hostNames: Seq[String] = Seq.empty[String]): Unit = {
+    def compareStageAttempt(taskSet: TaskSet): Boolean = {
+      taskSet.stageId == stageId && taskSet.stageAttemptId == attemptIdx
+    }
+
+    val stageAttempt = taskSets.find(compareStageAttempt(_)).getOrElse(taskSets.last)

Review comment:
       This indicates that the user has used the wrong `stageId` and `attemptIdx`.
   Let us improve it.




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[GitHub] [spark] beliefer commented on a change in pull request #28641: [SPARK-31824][CORE][TESTS] DAGSchedulerSuite: Improve and reuse completeShuffleMapStageSuccessfully

Posted by GitBox <gi...@apache.org>.
beliefer commented on a change in pull request #28641:
URL: https://github.com/apache/spark/pull/28641#discussion_r435070559



##########
File path: core/src/test/scala/org/apache/spark/scheduler/DAGSchedulerSuite.scala
##########
@@ -889,16 +870,40 @@ class DAGSchedulerSuite extends SparkFunSuite with LocalSparkContext with TimeLi
    * @param stageId - The current stageId
    * @param attemptIdx - The current attempt count
    * @param numShufflePartitions - The number of partitions in the next stage
+   * @param taskSetOpt - The index of task set
+   * @param hostNames - Host on which each task in the task set is executed
+   * @param mapTaskIds - ID of each task in the task set
+   * @param execIds - ID of the executor in which each task in the task set is executed
    */
   private def completeShuffleMapStageSuccessfully(

Review comment:
       @Ngone51 Thanks! Only two test cases passed `maptaskids`. I will delete this parameter.




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[GitHub] [spark] jiangxb1987 commented on a change in pull request #28641: [SPARK-31824][CORE][TESTS] DAGSchedulerSuite: Improve and reuse completeShuffleMapStageSuccessfully

Posted by GitBox <gi...@apache.org>.
jiangxb1987 commented on a change in pull request #28641:
URL: https://github.com/apache/spark/pull/28641#discussion_r435012863



##########
File path: core/src/test/scala/org/apache/spark/scheduler/DAGSchedulerSuite.scala
##########
@@ -889,16 +870,40 @@ class DAGSchedulerSuite extends SparkFunSuite with LocalSparkContext with TimeLi
    * @param stageId - The current stageId
    * @param attemptIdx - The current attempt count
    * @param numShufflePartitions - The number of partitions in the next stage
+   * @param taskSetOpt - The index of task set
+   * @param hostNames - Host on which each task in the task set is executed
+   * @param mapTaskIds - ID of each task in the task set
+   * @param execIds - ID of the executor in which each task in the task set is executed
    */
   private def completeShuffleMapStageSuccessfully(
       stageId: Int,
       attemptIdx: Int,
-      numShufflePartitions: Int): Unit = {
-    val stageAttempt = taskSets.last
+      numShufflePartitions: Int,
+      taskSetOpt: Option[Int] = None,

Review comment:
       Is this TaskSet index really needed? We should avoid rely on the ordering of TaskSets to verify the results.




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