YARN-4034. Render cluster Max Priority in scheduler metrics in RM web UI. Contributed by Rohith Sharma K S

hadoop-yarn-project/CHANGES.txt

@@ -194,6 +194,9 @@ Release 2.8.0 - UNRELEASED
     command line. (Inigo Goiri, Kenji Kikushima and Junping Du 
     via junping_du)
 
+    YARN-4034. Render cluster Max Priority in scheduler metrics in RM web
+    UI. (Rohith Sharma K S via jianhe)
+
   IMPROVEMENTS
 
     YARN-644. Basic null check is not performed on passed in arguments before

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/AbstractYarnScheduler.java

@@ -713,6 +713,7 @@ public abstract class AbstractYarnScheduler
     // specific scheduler.
   }
 
+  @Override
   public Priority getMaxClusterLevelAppPriority() {
     return maxClusterLevelAppPriority;
   }

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/YarnScheduler.java

@@ -343,4 +343,11 @@ public interface YarnScheduler extends EventHandler<SchedulerEvent> {
    */
   List<ResourceRequest> getPendingResourceRequestsForAttempt(
       ApplicationAttemptId attemptId);
+
+  /**
+   * Get cluster max priority.
+   * 
+   * @return maximum priority of cluster
+   */
+  Priority getMaxClusterLevelAppPriority();
 }

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

@@ -158,7 +158,9 @@ class CapacitySchedulerPage extends RmView {
       _("Default Node Label Expression:",
               lqinfo.getDefaultNodeLabelExpression() == null
                   ? NodeLabel.DEFAULT_NODE_LABEL_PARTITION
-                  : lqinfo.getDefaultNodeLabelExpression());
+                  : lqinfo.getDefaultNodeLabelExpression()).
+      _("Default Application Priority:",
+              Integer.toString(lqinfo.getDefaultApplicationPriority()));
     }
   }
 

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

@@ -167,6 +167,8 @@ public class MetricsOverviewTable extends HtmlBlock {
         th().$class("ui-state-default")._("Scheduling Resource Type")._().
         th().$class("ui-state-default")._("Minimum Allocation")._().
         th().$class("ui-state-default")._("Maximum Allocation")._().
+        th().$class("ui-state-default")
+            ._("Maximum Cluster Application Priority")._().
       _().
     _().
     tbody().$class("ui-widget-content").
@@ -175,6 +177,7 @@ public class MetricsOverviewTable extends HtmlBlock {
         td(String.valueOf(schedulerInfo.getSchedulerResourceTypes())).
         td(schedulerInfo.getMinAllocation().toString()).
         td(schedulerInfo.getMaxAllocation().toString()).
+        td(String.valueOf(schedulerInfo.getMaxClusterLevelAppPriority())).
       _().
     _()._();
 

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

@@ -41,6 +41,7 @@ public class CapacitySchedulerLeafQueueInfo extends CapacitySchedulerQueueInfo {
   protected ResourceInfo userAMResourceLimit;
   protected boolean preemptionDisabled;
   protected String defaultNodeLabelExpression;
+  protected int defaultPriority;
 
   @XmlTransient
   protected String orderingPolicyInfo;
@@ -64,6 +65,7 @@ public class CapacitySchedulerLeafQueueInfo extends CapacitySchedulerQueueInfo {
     preemptionDisabled = q.getPreemptionDisabled();
     orderingPolicyInfo = q.getOrderingPolicy().getInfo();
     defaultNodeLabelExpression = q.getDefaultNodeLabelExpression();
+    defaultPriority = q.getDefaultApplicationPriority().getPriority();
   }
 
   public int getNumActiveApplications() {
@@ -122,4 +124,8 @@ public class CapacitySchedulerLeafQueueInfo extends CapacitySchedulerQueueInfo {
   public String getDefaultNodeLabelExpression() {
     return defaultNodeLabelExpression;
   }
+
+  public int getDefaultApplicationPriority() {
+    return defaultPriority;
+  }
 }

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

@@ -38,6 +38,7 @@ public class SchedulerInfo {
   protected ResourceInfo minAllocResource;
   protected ResourceInfo maxAllocResource;
   protected EnumSet<SchedulerResourceTypes> schedulingResourceTypes;
+  protected int maximumClusterPriority;
 
   public SchedulerInfo() {
   } // JAXB needs this
@@ -55,6 +56,8 @@ public class SchedulerInfo {
     this.minAllocResource = new ResourceInfo(rs.getMinimumResourceCapability());
     this.maxAllocResource = new ResourceInfo(rs.getMaximumResourceCapability());
     this.schedulingResourceTypes = rs.getSchedulingResourceTypes();
+    this.maximumClusterPriority =
+        rs.getMaxClusterLevelAppPriority().getPriority();
   }
 
   public String getSchedulerType() {
@@ -73,4 +76,7 @@ public class SchedulerInfo {
     return this.schedulingResourceTypes.toString();
   }
 
+  public int getMaxClusterLevelAppPriority() {
+    return this.maximumClusterPriority;
+  }
 }

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/webapp/TestNodesPage.java

@@ -48,7 +48,7 @@ public class TestNodesPage {
 
   // Number of Actual Table Headers for NodesPage.NodesBlock might change in
   // future. In that case this value should be adjusted to the new value.
-  final int numberOfThInMetricsTable = 21;
+  final int numberOfThInMetricsTable = 22;
   final int numberOfActualTableHeaders = 13;
 
   private Injector injector;

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/webapp/TestRMWebServicesCapacitySched.java

@@ -352,7 +352,7 @@ public class TestRMWebServicesCapacitySched extends JerseyTestBase {
     int numExpectedElements = 16;
     boolean isParentQueue = true;
     if (!info.has("queues")) {
-      numExpectedElements = 28;
+      numExpectedElements = 29;
       isParentQueue = false;
     }
     assertEquals("incorrect number of elements", numExpectedElements, info.length());