YARN-2859-addendum: fix the remaining issue from the previous patch.

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-applicationhistoryservice/src/main/java/org/apache/hadoop/yarn/server/applicationhistoryservice/ApplicationHistoryServer.java

@@ -127,10 +127,14 @@ public class ApplicationHistoryServer extends CompositeService {
     return this.ahsClientService;
   }
 
+  private InetSocketAddress getListenerAddress() {
+     return this.webApp.httpServer().getConnectorAddress(0);
+  }
+
   @Private
   @VisibleForTesting
   public int getPort() {
-    return this.webApp.httpServer().getConnectorAddress(0).getPort();
+    return this.getListenerAddress().getPort();
   }
 
   /**
@@ -278,6 +282,12 @@ public class ApplicationHistoryServer extends CompositeService {
                 ahsClientService, "ws")
             .with(conf).at(bindAddress).start(
                 new AHSWebApp(timelineDataManager, ahsClientService));
+
+      conf.updateConnectAddr(YarnConfiguration.TIMELINE_SERVICE_BIND_HOST,
+        YarnConfiguration.TIMELINE_SERVICE_WEBAPP_ADDRESS,
+        YarnConfiguration.DEFAULT_TIMELINE_SERVICE_WEBAPP_ADDRESS,
+        this.getListenerAddress());
+      LOG.info("Instantiating AHSWebApp at " + getPort());
     } catch (Exception e) {
       String msg = "AHSWebApp failed to start.";
       LOG.error(msg, e);