YARN-3169. Drop YARN's overview document. Contributed by Brahma Reddy Battula.

(cherry picked from commit b419c1b2ec)

hadoop-project/src/site/site.xml

@@ -113,7 +113,6 @@
     </menu>
 
     <menu name="YARN" inherit="top">
-      <item name="Overview" href="hadoop-yarn/hadoop-yarn-site/index.html"/>
       <item name="YARN Architecture" href="hadoop-yarn/hadoop-yarn-site/YARN.html"/>
       <item name="Capacity Scheduler" href="hadoop-yarn/hadoop-yarn-site/CapacityScheduler.html"/>
       <item name="Fair Scheduler" href="hadoop-yarn/hadoop-yarn-site/FairScheduler.html"/>

hadoop-yarn-project/CHANGES.txt

@@ -144,6 +144,8 @@ Release 2.8.0 - UNRELEASED
     YARN-3523. Cleanup ResourceManagerAdministrationProtocol interface audience.
     (Naganarasimha G R via junping_du)
 
+    YARN-3169. Drop YARN's overview document. (Brahma Reddy Battula via ozawa)
+
   OPTIMIZATIONS
 
     YARN-3339. TestDockerContainerExecutor should pull a single image and not

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-site/src/site/markdown/index.md

@@ -1,75 +0,0 @@
-<!---
-  Licensed 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. See accompanying LICENSE file.
--->
-
-MapReduce NextGen aka YARN aka MRv2
-===================================
-
-The new architecture introduced in hadoop-0.23, divides the two major functions of the JobTracker: resource management and job life-cycle management into separate components.
-
-The new ResourceManager manages the global assignment of compute resources to applications and the per-application ApplicationMaster manages the application’s scheduling and coordination.
-
-An application is either a single job in the sense of classic MapReduce jobs or a DAG of such jobs.
-
-The ResourceManager and per-machine NodeManager daemon, which manages the user processes on that machine, form the computation fabric.
-
-The per-application ApplicationMaster is, in effect, a framework specific library and is tasked with negotiating resources from the ResourceManager and working with the NodeManager(s) to execute and monitor the tasks.
-
-More details are available in the [Architecture](./YARN.html) document.
-
-Documentation Index
-===================
-
-YARN
-----
-
-* [YARN Architecture](./YARN.html)
-
-* [Capacity Scheduler](./CapacityScheduler.html)
-
-* [Fair Scheduler](./FairScheduler.html)
-
-* [ResourceManager Restart](./ResourceManagerRestart.htaml)
-
-* [ResourceManager HA](./ResourceManagerHA.html)
-
-* [Web Application Proxy](./WebApplicationProxy.html)
-
-* [YARN Timeline Server](./TimelineServer.html)
-
-* [Writing YARN Applications](./WritingYarnApplications.html)
-
-* [YARN Commands](./YarnCommands.html)
-
-* [Scheduler Load Simulator](#hadoop-slsSchedulerLoadSimulator.html)
-
-* [NodeManager Restart](./NodeManagerRestart.html)
-
-* [DockerContainerExecutor](./DockerContainerExecutor.html)
-
-* [Using CGroups](./NodeManagerCGroups.html)
-
-* [Secure Containers](./SecureContainer.html)
-
-* [Registry](./registry/index.html)
-
-YARN REST APIs
---------------
-
-* [Introduction](./WebServicesIntro.html)
-
-* [Resource Manager](./ResourceManagerRest.html)
-
-* [Node Manager](./NodeManagerRest.html)
-
-