Github user andrewor14 commented on a diff in the pull request:
https://github.com/apache/spark/pull/7820#discussion_r36031649
--- Diff:
core/src/main/scala/org/apache/spark/deploy/mesos/MesosExternalShuffleService.scala
---
@@ -0,0 +1,127 @@
+/*
+ * 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.mesos
+
+import java.util.concurrent.CountDownLatch
+
+import scala.collection.mutable
+
+import org.apache.spark.deploy.ExternalShuffleService
+import org.apache.spark.rpc.{RpcAddress, RpcEnv, ThreadSafeRpcEndpoint}
+import org.apache.spark.util.Utils
+import org.apache.spark.{Logging, SecurityManager, SparkConf}
+
+private[mesos] class MesosExternalShuffleService(conf: SparkConf,
securityManager: SecurityManager)
+ extends ExternalShuffleService(conf, securityManager) {
+
+ private var rpcEnv: RpcEnv = _
+
+ override def start(): Unit = {
+ super.start()
+ val port = conf.getInt("spark.mesos.shuffle.service.port", 7327)
+ logInfo(s"Starting Mesos external shuffle service endpoint on port
$port")
+ rpcEnv = RpcEnv.create(
+ MesosExternalShuffleService.SYSTEM_NAME,
+ Utils.localHostName(),
+ port,
+ conf,
+ securityManager)
+ val endpoint = new MesosExternalShuffleServiceEndpoint(rpcEnv)
+ rpcEnv.setupEndpoint(MesosExternalShuffleService.ENDPOINT_NAME,
endpoint)
+ }
+
+ override def stop(): Unit = {
+ rpcEnv.shutdown()
+ rpcEnv.awaitTermination()
+ super.stop()
+ }
+
+ private class MesosExternalShuffleServiceEndpoint(override val rpcEnv:
RpcEnv)
--- End diff --
can you add a java doc for this class:
```
An RPC endpoint for talking to the Spark driver.
```
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