Github user pwendell commented on a diff in the pull request:
https://github.com/apache/spark/pull/204#discussion_r11262132
--- Diff:
core/src/main/scala/org/apache/spark/deploy/history/HistoryServer.scala ---
@@ -0,0 +1,221 @@
+/*
+ * 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.deploy.history
+
+import java.net.URI
+import javax.servlet.http.HttpServletRequest
+
+import scala.collection.mutable
+import scala.concurrent._
+import scala.concurrent.ExecutionContext.Implicits.global
+import scala.util.{Failure, Success}
+
+import org.apache.hadoop.fs.{FileStatus, Path}
+import org.eclipse.jetty.servlet.ServletContextHandler
+
+import org.apache.spark.{Logging, SecurityManager, SparkConf}
+import org.apache.spark.deploy.SparkUIContainer
+import org.apache.spark.ui.SparkUI
+import org.apache.spark.ui.JettyUtils._
+import org.apache.spark.util.Utils
+import org.apache.spark.scheduler.{ApplicationEventListener,
ReplayListenerBus}
+
+/**
+ * A web server that renders SparkUIs of finished applications.
+ *
+ * For the standalone mode, MasterWebUI already achieves this
functionality. Thus, the
+ * main use case of the HistoryServer is in other deploy modes (e.g. Yarn
or Mesos).
+ *
+ * The logging directory structure is as follows: Within the given base
directory, each
+ * application's event logs are maintained in the application's own
sub-directory. This
+ * is the same structure as maintained in the event log write code path in
+ * EventLoggingListener.
+ *
+ * @param baseLogDir The base directory in which event logs are found
+ * @param requestedPort The requested port to which this server is to be
bound
+ */
+class HistoryServer(val baseLogDir: String, requestedPort: Int)
+ extends SparkUIContainer("History Server") with Logging {
+
+ private val fileSystem = Utils.getHadoopFileSystem(new URI(baseLogDir))
+ private val host =
Option(System.getenv("SPARK_PUBLIC_DNS")).getOrElse(Utils.localHostName())
--- End diff --
Hey @andrewor14 - this shouldn't try to bind to SPARK_PUBLIC_DNS (good
catch @tgravescs). It's sufficient to just bind to `Utils.localHostName`.
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