YARN-3406. Display count of running containers in the RM's Web UI. Contributed by Ryu Kobayashi.

hadoop-yarn-project/CHANGES.txt

@@ -168,6 +168,9 @@ Release 2.8.0 - UNRELEASED
 
     YARN-3511. Add errors and warnings page to ATS. (Varun Vasudev via xgong)
 
+    YARN-3406. Display count of running containers in the RM's Web UI.
+    (Ryu Kobayashi via ozawa)
+
   OPTIMIZATIONS
 
     YARN-3339. TestDockerContainerExecutor should pull a single image and not

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-common/src/main/java/org/apache/hadoop/yarn/server/webapp/WebPageUtils.java

@@ -24,10 +24,11 @@ import static org.apache.hadoop.yarn.webapp.view.JQueryUI.tableInit;
 public class WebPageUtils {
 
   public static String appsTableInit() {
-    return appsTableInit(false);
+    return appsTableInit(false, true);
   }
 
-  public static String appsTableInit(boolean isFairSchedulerPage) {
+  public static String appsTableInit(
+      boolean isFairSchedulerPage, boolean isResourceManager) {
     // id, user, name, queue, starttime, finishtime, state, status, progress, ui
     // FairSchedulerPage's table is a bit different
     return tableInit()
@@ -35,22 +36,30 @@ public class WebPageUtils {
       .append(", bDeferRender: true")
       .append(", bProcessing: true")
       .append("\n, aoColumnDefs: ")
-      .append(getAppsTableColumnDefs(isFairSchedulerPage))
+      .append(getAppsTableColumnDefs(isFairSchedulerPage, isResourceManager))
       // Sort by id upon page load
       .append(", aaSorting: [[0, 'desc']]}").toString();
   }
 
-  private static String getAppsTableColumnDefs(boolean isFairSchedulerPage) {
+  private static String getAppsTableColumnDefs(
+      boolean isFairSchedulerPage, boolean isResourceManager) {
     StringBuilder sb = new StringBuilder();
-    return sb
-      .append("[\n")
+    sb.append("[\n")
       .append("{'sType':'string', 'aTargets': [0]")
       .append(", 'mRender': parseHadoopID }")
       .append("\n, {'sType':'numeric', 'aTargets': " +
           (isFairSchedulerPage ? "[6, 7]": "[5, 6]"))
       .append(", 'mRender': renderHadoopDate }")
-      .append("\n, {'sType':'numeric', bSearchable:false, 'aTargets': [9]")
-      .append(", 'mRender': parseHadoopProgress }]").toString();
+      .append("\n, {'sType':'numeric', bSearchable:false, 'aTargets':");
+    if (isFairSchedulerPage) {
+      sb.append("[11]");
+    } else if (isResourceManager) {
+      sb.append("[10]");
+    } else {
+      sb.append("[9]");
+    }
+    sb.append(", 'mRender': parseHadoopProgress }]");
+    return sb.toString();
   }
 
   public static String attemptsTableInit() {

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-common/src/main/java/org/apache/hadoop/yarn/server/webapp/dao/AppInfo.java

@@ -42,6 +42,7 @@ public class AppInfo {
   protected String host;
   protected int rpcPort;
   protected YarnApplicationState appState;
+  protected int runningContainers;
   protected float progress;
   protected String diagnosticsInfo;
   protected String originalTrackingUrl;
@@ -77,6 +78,10 @@ public class AppInfo {
     finishedTime = app.getFinishTime();
     elapsedTime = Times.elapsed(startedTime, finishedTime);
     finalAppStatus = app.getFinalApplicationStatus();
+    if (app.getApplicationResourceUsageReport() != null) {
+      runningContainers =
+          app.getApplicationResourceUsageReport().getNumUsedContainers();
+    }
     progress = app.getProgress() * 100; // in percent
     if (app.getApplicationTags() != null && !app.getApplicationTags().isEmpty()) {
       this.applicationTags = CSV_JOINER.join(app.getApplicationTags());
@@ -119,6 +124,10 @@ public class AppInfo {
     return appState;
   }
 
+  public int getRunningContainers() {
+    return runningContainers;
+  }
+
   public float getProgress() {
     return progress;
   }

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/webapp/FairSchedulerAppsBlock.java

@@ -91,6 +91,7 @@ public class FairSchedulerAppsBlock extends HtmlBlock {
             th(".finishtime", "FinishTime").
             th(".state", "State").
             th(".finalstatus", "FinalStatus").
+            th(".runningcontainer", "Running Containers").
             th(".progress", "Progress").
             th(".ui", "Tracking UI")._()._().
         tbody();
@@ -132,6 +133,7 @@ public class FairSchedulerAppsBlock extends HtmlBlock {
       .append(appInfo.getFinishTime()).append("\",\"")
       .append(appInfo.getState()).append("\",\"")
       .append(appInfo.getFinalStatus()).append("\",\"")
+      .append(appInfo.getRunningContainers()).append("\",\"")
       // Progress bar
       .append("<br title='").append(percent)
       .append("'> <div class='").append(C_PROGRESSBAR).append("' title='")

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/webapp/FairSchedulerPage.java

@@ -237,7 +237,7 @@ public class FairSchedulerPage extends RmView {
 
   @Override
   protected String initAppsTable() {
-    return WebPageUtils.appsTableInit(true);
+    return WebPageUtils.appsTableInit(true, false);
   }
 
   static String percent(float f) {

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/webapp/RMAppsBlock.java

@@ -57,7 +57,9 @@ public class RMAppsBlock extends AppsBlock {
           .th(".name", "Name").th(".type", "Application Type")
           .th(".queue", "Queue").th(".starttime", "StartTime")
           .th(".finishtime", "FinishTime").th(".state", "State")
-          .th(".finalstatus", "FinalStatus").th(".progress", "Progress")
+          .th(".finalstatus", "FinalStatus")
+          .th(".runningcontainer", "Running Containers")
+          .th(".progress", "Progress")
           .th(".ui", "Tracking UI").th(".blacklisted", "Blacklisted Nodes")._()
           ._().tbody();
 
@@ -108,6 +110,8 @@ public class RMAppsBlock extends AppsBlock {
         .append("\",\"")
         .append(app.getFinalAppStatus())
         .append("\",\"")
+        .append(String.valueOf(app.getRunningContainers()))
+        .append("\",\"")
         // Progress bar
         .append("<br title='").append(percent).append("'> <div class='")
         .append(C_PROGRESSBAR).append("' title='").append(join(percent, '%'))