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Posted to reviews@spark.apache.org by "yaooqinn (via GitHub)" <gi...@apache.org> on 2023/09/13 10:08:54 UTC

[GitHub] [spark] yaooqinn opened a new pull request, #42904: [SPARK-45151][CORE][UI] Task Level Thread Dump Support

yaooqinn opened a new pull request, #42904:
URL: https://github.com/apache/spark/pull/42904

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   This PR adds a point-and-click interface that reuses the STATUS column on the stage tab/page to enable trigger rendering of the newly added TaskThreadDumpPage.
   
   ![image](https://github.com/apache/spark/assets/8326978/549f5adf-e21d-48f6-95d1-ec0ed613f160)
   
   As you can see above, the point-and-click interface shows only for RUNNING tasks.
   
   During rendering, it will locate the executor by executorId and send a TaskThreadDump message to it to fetch the thread info by taskId. It then displays
   
   ![image](https://github.com/apache/spark/assets/8326978/bc1ff9dd-9d5a-4c01-922a-fdee804e776a)
   
   
   
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[GitHub] [spark] yaooqinn commented on pull request #42904: [SPARK-45151][CORE][UI] Task Level Thread Dump Support

Posted by "yaooqinn (via GitHub)" <gi...@apache.org>.
yaooqinn commented on PR #42904:
URL: https://github.com/apache/spark/pull/42904#issuecomment-1718697343

   cc @sarutak @dongjoon-hyun @srowen @cloud-fan @HyukjinKwon, please help me review this feature when you have time, thanks


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[GitHub] [spark] yaooqinn commented on a diff in pull request #42904: [SPARK-45151][CORE][UI] Task Level Thread Dump Support

Posted by "yaooqinn (via GitHub)" <gi...@apache.org>.
yaooqinn commented on code in PR #42904:
URL: https://github.com/apache/spark/pull/42904#discussion_r1325335543


##########
core/src/main/resources/org/apache/spark/ui/static/stagepage.js:
##########
@@ -849,7 +856,18 @@ $(document).ready(function () {
             {data: "partitionId", name: "Index"},
             {data : "taskId", name: "ID"},
             {data : "attempt", name: "Attempt"},
-            {data : "status", name: "Status"},
+            {
+              data : (row, _ignored_type) => {
+                if (taskThreadDumpEnabled && row.status === "RUNNING") {

Review Comment:
   Yes, Live only,  SC is required for display.



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[GitHub] [spark] yaooqinn commented on a diff in pull request #42904: [SPARK-45151][CORE][UI] Task Level Thread Dump Support

Posted by "yaooqinn (via GitHub)" <gi...@apache.org>.
yaooqinn commented on code in PR #42904:
URL: https://github.com/apache/spark/pull/42904#discussion_r1325338571


##########
core/src/main/scala/org/apache/spark/scheduler/SchedulerBackend.scala:
##########
@@ -53,6 +54,8 @@ private[spark] trait SchedulerBackend {
       reason: String): Unit =
     throw new UnsupportedOperationException
 
+  def getTaskThreadDump(taskId: Long, executorId: String): Option[ThreadStackTrace]

Review Comment:
   Currently, it depends on the `spark.rpc.askTimeout/spark.network.timeout`, I am not sure if we need a separate timeout key for some particular case like here



##########
core/src/main/scala/org/apache/spark/scheduler/SchedulerBackend.scala:
##########
@@ -53,6 +54,8 @@ private[spark] trait SchedulerBackend {
       reason: String): Unit =
     throw new UnsupportedOperationException
 
+  def getTaskThreadDump(taskId: Long, executorId: String): Option[ThreadStackTrace]

Review Comment:
   Currently, it depends on the `spark.rpc.askTimeout/spark.network.timeout`, I am not sure if we need a separate timeout key for some particular cases like here



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[GitHub] [spark] mridulm commented on a diff in pull request #42904: [SPARK-45151][CORE][UI] Task Level Thread Dump Support

Posted by "mridulm (via GitHub)" <gi...@apache.org>.
mridulm commented on code in PR #42904:
URL: https://github.com/apache/spark/pull/42904#discussion_r1325321480


##########
core/src/main/scala/org/apache/spark/scheduler/SchedulerBackend.scala:
##########
@@ -53,6 +54,8 @@ private[spark] trait SchedulerBackend {
       reason: String): Unit =
     throw new UnsupportedOperationException
 
+  def getTaskThreadDump(taskId: Long, executorId: String): Option[ThreadStackTrace]

Review Comment:
   Do we want to specify a timeout here (and propagate it) ? In case executor is severely loaded.
   This is currently not being done for executor thread dumps as well though ...



##########
core/src/main/resources/org/apache/spark/ui/static/stagepage.js:
##########
@@ -849,7 +856,18 @@ $(document).ready(function () {
             {data: "partitionId", name: "Index"},
             {data : "taskId", name: "ID"},
             {data : "attempt", name: "Attempt"},
-            {data : "status", name: "Status"},
+            {
+              data : (row, _ignored_type) => {
+                if (taskThreadDumpEnabled && row.status === "RUNNING") {

Review Comment:
   To confirm, this will show up only in live UI (due to `StagesTab,threadDumpEnabled`), right ?.



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[GitHub] [spark] yaooqinn commented on a diff in pull request #42904: [SPARK-45151][CORE][UI] Task Level Thread Dump Support

Posted by "yaooqinn (via GitHub)" <gi...@apache.org>.
yaooqinn commented on code in PR #42904:
URL: https://github.com/apache/spark/pull/42904#discussion_r1326735084


##########
core/src/main/scala/org/apache/spark/ui/jobs/TaskThreadDumpPage.scala:
##########
@@ -0,0 +1,109 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.ui.jobs
+
+import javax.servlet.http.HttpServletRequest
+
+import scala.xml.{Node, Text}
+
+import org.apache.spark.SparkContext
+import org.apache.spark.ui.{SparkUITab, UIUtils, WebUIPage}
+
+private[spark] class TaskThreadDumpPage(
+    parent: SparkUITab,
+    sc: Option[SparkContext]) extends WebUIPage("taskThreadDump") {
+
+  private def executorThreadDumpUrl(
+      request: HttpServletRequest,
+      executorId: String,
+      blockingThreadId: Long): String = {
+    val uiRoot = UIUtils.prependBaseUri(request, parent.basePath)
+    s"$uiRoot/executors/?executorId=$executorId#${blockingThreadId}_td_id"
+  }
+
+  override def render(request: HttpServletRequest): Seq[Node] = {
+    val executorId = Option(request.getParameter("executorId")).map { executorId =>
+      UIUtils.decodeURLParameter(executorId)
+    }.getOrElse {
+      throw new IllegalArgumentException(s"Missing executorId parameter")
+    }
+    val taskId = Option(request.getParameter("taskId")).map { taskId =>
+      val decoded = UIUtils.decodeURLParameter(taskId)
+      decoded.toLong
+    }.getOrElse {
+      throw new IllegalArgumentException(s"Missing executorId parameter")

Review Comment:
   ```suggestion
         throw new IllegalArgumentException(s"Missing taskId parameter")
   ```



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[GitHub] [spark] yaooqinn closed pull request #42904: [SPARK-45151][CORE][UI] Task Level Thread Dump Support

Posted by "yaooqinn (via GitHub)" <gi...@apache.org>.
yaooqinn closed pull request #42904: [SPARK-45151][CORE][UI] Task Level Thread Dump Support
URL: https://github.com/apache/spark/pull/42904


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[GitHub] [spark] yaooqinn commented on pull request #42904: [SPARK-45151][CORE][UI] Task Level Thread Dump Support

Posted by "yaooqinn (via GitHub)" <gi...@apache.org>.
yaooqinn commented on PR #42904:
URL: https://github.com/apache/spark/pull/42904#issuecomment-1718745947

   Thank @mridulm for the check


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[GitHub] [spark] yaooqinn commented on pull request #42904: [SPARK-45151][CORE][UI] Task Level Thread Dump Support

Posted by "yaooqinn (via GitHub)" <gi...@apache.org>.
yaooqinn commented on PR #42904:
URL: https://github.com/apache/spark/pull/42904#issuecomment-1720406726

   Thank you @mridulm, pending CI


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[GitHub] [spark] dongjoon-hyun commented on a diff in pull request #42904: [SPARK-45151][CORE][UI] Task Level Thread Dump Support

Posted by "dongjoon-hyun (via GitHub)" <gi...@apache.org>.
dongjoon-hyun commented on code in PR #42904:
URL: https://github.com/apache/spark/pull/42904#discussion_r1326772213


##########
core/src/main/scala/org/apache/spark/status/api/v1/OneApplicationResource.scala:
##########
@@ -52,18 +52,24 @@ private[v1] class AbstractApplicationResource extends BaseAppResource {
   @Path("executors")
   def executorList(): Seq[ExecutorSummary] = withUI(_.store.executorList(true))
 
-  @GET
-  @Path("executors/{executorId}/threads")
-  def threadDump(@PathParam("executorId") execId: String): Array[ThreadStackTrace] = withUI { ui =>
+  private def checkExecutorId(execId: String): Unit = {

Review Comment:
   If you don't mind, could you move these two new private methods, `checkExecutorId` and `checkAndGetSparkContext` at the end of this class in order to reduce the diff, please?



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[GitHub] [spark] yaooqinn commented on a diff in pull request #42904: [SPARK-45151][CORE][UI] Task Level Thread Dump Support

Posted by "yaooqinn (via GitHub)" <gi...@apache.org>.
yaooqinn commented on code in PR #42904:
URL: https://github.com/apache/spark/pull/42904#discussion_r1326778557


##########
core/src/main/scala/org/apache/spark/status/api/v1/OneApplicationResource.scala:
##########
@@ -52,18 +52,24 @@ private[v1] class AbstractApplicationResource extends BaseAppResource {
   @Path("executors")
   def executorList(): Seq[ExecutorSummary] = withUI(_.store.executorList(true))
 
-  @GET
-  @Path("executors/{executorId}/threads")
-  def threadDump(@PathParam("executorId") execId: String): Array[ThreadStackTrace] = withUI { ui =>
+  private def checkExecutorId(execId: String): Unit = {

Review Comment:
   thanks, @dongjoon-hyun, it looks much better



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[GitHub] [spark] dongjoon-hyun commented on a diff in pull request #42904: [SPARK-45151][CORE][UI] Task Level Thread Dump Support

Posted by "dongjoon-hyun (via GitHub)" <gi...@apache.org>.
dongjoon-hyun commented on code in PR #42904:
URL: https://github.com/apache/spark/pull/42904#discussion_r1326838058


##########
core/src/main/scala/org/apache/spark/status/api/v1/OneApplicationResource.scala:
##########
@@ -172,6 +180,18 @@ private[v1] class AbstractApplicationResource extends BaseAppResource {
     classOf[OneApplicationAttemptResource]
   }
 
+  private def checkExecutorId(execId: String): Unit = {
+    if (execId != SparkContext.DRIVER_IDENTIFIER && !execId.forall(Character.isDigit)) {
+      throw new BadParameterException(
+        s"Invalid executorId: neither '${SparkContext.DRIVER_IDENTIFIER}' nor number.")
+    }
+  }
+
+  private def checkAndGetSparkContext(): SparkContext = withUI { ui =>
+    ui.sc.getOrElse {
+      throw new ServiceUnavailable("Thread dumps not available through the history server.")
+    }
+  }

Review Comment:
   Thank you so much.



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[GitHub] [spark] yaooqinn commented on pull request #42904: [SPARK-45151][CORE][UI] Task Level Thread Dump Support

Posted by "yaooqinn (via GitHub)" <gi...@apache.org>.
yaooqinn commented on PR #42904:
URL: https://github.com/apache/spark/pull/42904#issuecomment-1721030343

   The second last commits passed CI and the last is a minor.
   
   Thanks @mridulm and @dongjoon-hyun for the review
   Merged to master
   


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