YARN-3351. AppMaster tracking URL is broken in HA. (Anubhav Dhoot via kasha)

hadoop-yarn-project/CHANGES.txt

@@ -78,6 +78,8 @@ Release 2.8.0 - UNRELEASED
     YARN-3205 FileSystemRMStateStore should disable FileSystem Cache to avoid
     get a Filesystem with an old configuration. (Zhihai Xu via ozawa)
 
+    YARN-3351. AppMaster tracking URL is broken in HA. (Anubhav Dhoot via kasha)
+
 Release 2.7.0 - UNRELEASED
 
   INCOMPATIBLE CHANGES

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/webapp/util/WebAppUtils.java

@@ -130,11 +130,23 @@ public class WebAppUtils {
     return addr;
   }
 
+  public static String getResolvedRemoteRMWebAppURLWithScheme(
+      Configuration conf) {
+    return getHttpSchemePrefix(conf)
+        + getResolvedRemoteRMWebAppURLWithoutScheme(conf);
+  }
+
   public static String getResolvedRMWebAppURLWithScheme(Configuration conf) {
     return getHttpSchemePrefix(conf)
         + getResolvedRMWebAppURLWithoutScheme(conf);
   }
   
+  public static String getResolvedRemoteRMWebAppURLWithoutScheme(
+      Configuration conf) {
+    return getResolvedRemoteRMWebAppURLWithoutScheme(conf,
+        YarnConfiguration.useHttps(conf) ? Policy.HTTPS_ONLY : Policy.HTTP_ONLY);
+  }
+
   public static String getResolvedRMWebAppURLWithoutScheme(Configuration conf) {
     return getResolvedRMWebAppURLWithoutScheme(conf,
         YarnConfiguration.useHttps(conf) ? Policy.HTTPS_ONLY : Policy.HTTP_ONLY);
@@ -143,6 +155,23 @@ public class WebAppUtils {
   public static String getResolvedRMWebAppURLWithoutScheme(Configuration conf,
       Policy httpPolicy) {
     InetSocketAddress address = null;
+    if (httpPolicy == Policy.HTTPS_ONLY) {
+      address =
+          conf.getSocketAddr(YarnConfiguration.RM_WEBAPP_HTTPS_ADDRESS,
+              YarnConfiguration.DEFAULT_RM_WEBAPP_HTTPS_ADDRESS,
+              YarnConfiguration.DEFAULT_RM_WEBAPP_HTTPS_PORT);
+    } else {
+      address =
+          conf.getSocketAddr(YarnConfiguration.RM_WEBAPP_ADDRESS,
+              YarnConfiguration.DEFAULT_RM_WEBAPP_ADDRESS,
+              YarnConfiguration.DEFAULT_RM_WEBAPP_PORT);      
+    }
+    return getResolvedAddress(address);
+  }
+
+  public static String getResolvedRemoteRMWebAppURLWithoutScheme(Configuration conf,
+      Policy httpPolicy) {
+    InetSocketAddress address = null;
     String rmId = null;
     if (HAUtil.isHAEnabled(conf)) {
       // If HA enabled, pick one of the RM-IDs and rely on redirect to go to

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/test/java/org/apache/hadoop/yarn/util/TestWebAppUtils.java

@@ -0,0 +1,81 @@
+/**
+ * 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.hadoop.yarn.util;
+
+import org.apache.hadoop.conf.Configuration;
+import org.apache.hadoop.net.NetUtils;
+import org.apache.hadoop.yarn.conf.YarnConfiguration;
+import org.apache.hadoop.yarn.webapp.util.WebAppUtils;
+import org.junit.AfterClass;
+import org.junit.Assert;
+import org.junit.BeforeClass;
+import org.junit.Test;
+
+import java.net.UnknownHostException;
+import java.util.HashMap;
+import java.util.Map;
+
+public class TestWebAppUtils {
+
+  private static final String RM1_NODE_ID = "rm1";
+  private static final String RM2_NODE_ID = "rm2";
+
+  // Because WebAppUtils#getResolvedAddress tries to resolve the hostname, we add a static mapping for dummy hostnames
+  // to make this test run anywhere without having to give some resolvable hostnames
+  private static String dummyHostNames[] = {"host1", "host2", "host3"};
+  private static final String anyIpAddress = "1.2.3.4";
+  private static Map<String, String> savedStaticResolution = new HashMap<>();
+
+  @BeforeClass
+  public static void initializeDummyHostnameResolution() throws Exception {
+    String previousIpAddress;
+    for (String hostName : dummyHostNames) {
+      if (null != (previousIpAddress = NetUtils.getStaticResolution(hostName))) {
+        savedStaticResolution.put(hostName, previousIpAddress);
+      }
+      NetUtils.addStaticResolution(hostName, anyIpAddress);
+    }
+  }
+
+  @AfterClass
+  public static void restoreDummyHostnameResolution() throws Exception {
+    for (Map.Entry<String, String> hostnameToIpEntry : savedStaticResolution.entrySet()) {
+      NetUtils.addStaticResolution(hostnameToIpEntry.getKey(), hostnameToIpEntry.getValue());
+    }
+  }
+
+  @Test
+  public void TestRMWebAppURLRemoteAndLocal() throws UnknownHostException {
+    Configuration configuration = new Configuration();
+    final String rmAddress = "host1:8088";
+    configuration.set(YarnConfiguration.RM_WEBAPP_ADDRESS, rmAddress);
+    final String rm1Address = "host2:8088";
+    final String rm2Address = "host3:8088";
+    configuration.set(YarnConfiguration.RM_WEBAPP_ADDRESS + "." + RM1_NODE_ID, rm1Address);
+    configuration.set(YarnConfiguration.RM_WEBAPP_ADDRESS + "." + RM2_NODE_ID, rm2Address);
+    configuration.setBoolean(YarnConfiguration.RM_HA_ENABLED, true);
+    configuration.set(YarnConfiguration.RM_HA_IDS, RM1_NODE_ID + "," + RM2_NODE_ID);
+
+    String rmRemoteUrl = WebAppUtils.getResolvedRemoteRMWebAppURLWithoutScheme(configuration);
+    Assert.assertEquals("ResolvedRemoteRMWebAppUrl should resolve to the first HA RM address", rm1Address, rmRemoteUrl);
+
+    String rmLocalUrl = WebAppUtils.getResolvedRMWebAppURLWithoutScheme(configuration);
+    Assert.assertEquals("ResolvedRMWebAppUrl should resolve to the default RM webapp address", rmAddress, rmLocalUrl);
+  }
+}

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/main/java/org/apache/hadoop/yarn/server/nodemanager/webapp/NavBlock.java

@@ -38,7 +38,7 @@ public class NavBlock extends HtmlBlock implements YarnWebParams {
   protected void render(Block html) {
 	
     String RMWebAppURL =
-        WebAppUtils.getResolvedRMWebAppURLWithScheme(this.conf);
+        WebAppUtils.getResolvedRemoteRMWebAppURLWithScheme(this.conf);
 	  html
       .div("#nav")
       .h3()._("ResourceManager")._()