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From andrewor14 <...@git.apache.org>
Subject [GitHub] spark pull request: [SPARK-5338][MESOS] Add cluster mode support f...
Date Wed, 25 Mar 2015 21:30:30 GMT
Github user andrewor14 commented on a diff in the pull request:

    https://github.com/apache/spark/pull/5144#discussion_r27168209
  
    --- Diff: core/src/main/scala/org/apache/spark/deploy/mesos/MesosClusterDispatcher.scala
---
    @@ -0,0 +1,204 @@
    +/*
    + * 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 org.apache.spark.{Logging, SecurityManager, SparkConf}
    +import org.apache.spark.util.{SignalLogger, IntParam, Utils}
    +
    +import java.io.File
    +import java.util.concurrent.{TimeUnit, CountDownLatch}
    +
    +import org.apache.spark.deploy.mesos.ui.MesosClusterUI
    +import org.apache.spark.deploy.rest.MesosRestServer
    +import org.apache.spark.scheduler.cluster.mesos._
    +import org.apache.spark.deploy.mesos.MesosClusterDispatcher.ClusterDispatcherArguments
    +import org.apache.mesos.state.{ZooKeeperState, InMemoryState}
    +
    +/*
    + * A dispatcher actor that is responsible for managing drivers, that is intended to
    + * used for Mesos cluster mode.
    + * This class is needed since Mesos doesn't manage frameworks, so the dispatcher acts
as
    + * a daemon to launch drivers as Mesos frameworks upon request.
    --- End diff --
    
    can you provide more detail here, like
    - what mode is it used in
    - when is it launched
    - who launches it
    - what is the lifecycle of a driver submitted against this dispatcher
    - ...


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