From 2c565fe262272d99ba406c989beabd1a731f9817 Mon Sep 17 00:00:00 2001
From: Gera Shegalov <gera@apache.org>
Date: Thu, 11 Jan 2018 00:38:36 -0800
Subject: [PATCH] HADOOP-15166: simplify minicluster start

---
 .../hadoop-common/src/site/markdown/CLIMiniCluster.md.vm    | 2 +-
 hadoop-mapreduce-project/bin/mapred                         | 6 ++++++
 2 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/hadoop-common-project/hadoop-common/src/site/markdown/CLIMiniCluster.md.vm b/hadoop-common-project/hadoop-common/src/site/markdown/CLIMiniCluster.md.vm
index 806df0a41dc7d..9aa9ad2ef11c1 100644
--- a/hadoop-common-project/hadoop-common/src/site/markdown/CLIMiniCluster.md.vm
+++ b/hadoop-common-project/hadoop-common/src/site/markdown/CLIMiniCluster.md.vm
@@ -41,7 +41,7 @@ Running the MiniCluster
 
 From inside the root directory of the extracted tarball, you can start the CLI MiniCluster using the following command:
 
-    $ HADOOP_CLASSPATH=share/hadoop/yarn/test/hadoop-yarn-server-tests-${project.version}-tests.jar bin/hadoop jar ./share/hadoop/mapreduce/hadoop-mapreduce-client-jobclient-${project.version}-tests.jar minicluster -rmport RM_PORT -jhsport JHS_PORT
+    $ bin/mapred minicluster -rmport RM_PORT -jhsport JHS_PORT
 
 In the example command above, `RM_PORT` and `JHS_PORT` should be replaced by the user's choice of these port numbers. If not specified, random free ports will be used.
 
diff --git a/hadoop-mapreduce-project/bin/mapred b/hadoop-mapreduce-project/bin/mapred
index 44f6216443eaa..9773ec89ded6c 100755
--- a/hadoop-mapreduce-project/bin/mapred
+++ b/hadoop-mapreduce-project/bin/mapred
@@ -36,6 +36,7 @@ function hadoop_usage
   hadoop_add_subcommand "sampler" client "sampler"
   hadoop_add_subcommand "frameworkuploader" admin "mapreduce framework upload"
   hadoop_add_subcommand "version" client "print the version"
+  hadoop_add_subcommand "minicluster" client "CLI MiniCluster"
   hadoop_generate_usage "${HADOOP_SHELL_EXECNAME}" true
 }
 
@@ -101,6 +102,11 @@ function mapredcmd_case
     version)
       HADOOP_CLASSNAME=org.apache.hadoop.util.VersionInfo
     ;;
+    minicluster)
+      hadoop_add_classpath "${HADOOP_YARN_HOME}/${YARN_DIR}/timelineservice"'/*'
+      hadoop_add_classpath "${HADOOP_YARN_HOME}/${YARN_DIR}/test"'/*'
+      HADOOP_CLASSNAME=org.apache.hadoop.mapreduce.MiniHadoopClusterManager
+    ;;
     *)
       HADOOP_CLASSNAME="${subcmd}"
       if ! hadoop_validate_classname "${HADOOP_CLASSNAME}"; then