SPARK-1417: Spark on Yarn - spark UI link from resourcemanager is broken

Author: Thomas Graves <tgraves@apache.org>

Closes #344 from tgravescs/SPARK-1417 and squashes the following commits:

c450b5f [Thomas Graves] fix test
e1c1d7e [Thomas Graves] add missing $ to appUIAddress
e982ddb [Thomas Graves] use appUIHostPort in appUIAddress
0803ec2 [Thomas Graves] Review comment updates - remove extra newline, simplify assert in test
658a8ec [Thomas Graves] Add a appUIHostPort routine
0614208 [Thomas Graves] Fix test
2a6b1b7 [Thomas Graves] SPARK-1417: Spark on Yarn - spark UI link from resourcemanager is broken

Author: tgravescs

core/src/main/scala/org/apache/spark/ui/SparkUI.scala

@@ -113,7 +113,12 @@ private[spark] class SparkUI(
     logInfo("Stopped Spark Web UI at %s".format(appUIAddress))
   }
 
-  private[spark] def appUIAddress = "http://" + publicHost + ":" + boundPort
+  /**
+   * Return the application UI host:port. This does not include the scheme (http://).
+   */
+  private[spark] def appUIHostPort = publicHost + ":" + boundPort
+
+  private[spark] def appUIAddress = s"http://$appUIHostPort"
 
 }
 

core/src/test/scala/org/apache/spark/SparkUISuite.scala

@@ -0,0 +1,35 @@
+/*
+ * 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
+
+import java.net.URI
+
+import org.scalatest.FunSuite
+
+class SparkUISuite extends FunSuite with SharedSparkContext {
+
+  test("verify appUIAddress contains the scheme") {
+    val uiAddress = sc.ui.appUIAddress
+    assert(uiAddress.equals("http://" + sc.ui.appUIHostPort))
+  }
+
+  test("verify appUIAddress contains the port") {
+    val splitUIAddress = sc.ui.appUIAddress.split(':')
+    assert(splitUIAddress(2).toInt == sc.ui.boundPort)
+  }
+}

yarn/alpha/src/main/scala/org/apache/spark/deploy/yarn/ApplicationMaster.scala

@@ -234,7 +234,7 @@ class ApplicationMaster(args: ApplicationMasterArguments, conf: Configuration,
         assert(sparkContext != null || count >= numTries)
 
         if (null != sparkContext) {
-          uiAddress = sparkContext.ui.appUIAddress
+          uiAddress = sparkContext.ui.appUIHostPort
           this.yarnAllocator = YarnAllocationHandler.newAllocator(
             yarnConf,
             resourceManager,

yarn/stable/src/main/scala/org/apache/spark/deploy/yarn/ApplicationMaster.scala

@@ -220,7 +220,7 @@ class ApplicationMaster(args: ApplicationMasterArguments, conf: Configuration,
         assert(sparkContext != null || numTries >= maxNumTries)
 
         if (sparkContext != null) {
-          uiAddress = sparkContext.ui.appUIAddress
+          uiAddress = sparkContext.ui.appUIHostPort
           this.yarnAllocator = YarnAllocationHandler.newAllocator(
             yarnConf,
             amClient,