From 366a12c3b9402f3c05522179c26f1972bfce8143 Mon Sep 17 00:00:00 2001
From: Tsuyoshi Ozawa <ozawa@apache.org>
Date: Fri, 6 Feb 2015 13:34:48 +0900
Subject: [PATCH] HADOOP-11543. Improve help message for hadoop/yarn command.
 Contributed by Brahma Reddy Battula.

---
 hadoop-common-project/hadoop-common/CHANGES.txt         | 3 +++
 hadoop-common-project/hadoop-common/src/main/bin/hadoop | 8 ++++----
 hadoop-yarn-project/hadoop-yarn/bin/yarn                | 9 +++++----
 3 files changed, 12 insertions(+), 8 deletions(-)

diff --git a/hadoop-common-project/hadoop-common/CHANGES.txt b/hadoop-common-project/hadoop-common/CHANGES.txt
index 4b0faf46ff8..287e9797c02 100644
--- a/hadoop-common-project/hadoop-common/CHANGES.txt
+++ b/hadoop-common-project/hadoop-common/CHANGES.txt
@@ -178,6 +178,9 @@ Release 2.7.0 - UNRELEASED
     HADOOP-11463 Replace method-local TransferManager object with
     S3AFileSystem#transfers. (Ted Yu via stevel)
 
+    HADOOP-11543. Improve help message for hadoop/yarn command.
+    (Brahma Reddy Battula via ozawa)
+
   OPTIMIZATIONS
 
     HADOOP-11323. WritableComparator#compare keeps reference to byte array.
diff --git a/hadoop-common-project/hadoop-common/src/main/bin/hadoop b/hadoop-common-project/hadoop-common/src/main/bin/hadoop
index bc33198f138..b71aa8c5a7f 100755
--- a/hadoop-common-project/hadoop-common/src/main/bin/hadoop
+++ b/hadoop-common-project/hadoop-common/src/main/bin/hadoop
@@ -32,8 +32,10 @@ HADOOP_LIBEXEC_DIR=${HADOOP_LIBEXEC_DIR:-$DEFAULT_LIBEXEC_DIR}
 . $HADOOP_LIBEXEC_DIR/hadoop-config.sh
 
 function print_usage(){
-  echo "Usage: hadoop [--config confdir] [--loglevel loglevel] COMMAND"
-  echo "       where COMMAND is one of:"
+  echo "Usage: hadoop [--config confdir] [COMMAND | CLASSNAME]"
+  echo "  CLASSNAME            run the class named CLASSNAME"
+  echo " or"
+  echo "  where COMMAND is one of:"
   echo "  fs                   run a generic filesystem user client"
   echo "  version              print the version"
   echo "  jar <jar>            run a jar file"
@@ -47,8 +49,6 @@ function print_usage(){
   echo "                       Hadoop jar and the required libraries"
   echo "  daemonlog            get/set the log level for each daemon"
   echo "  trace                view and modify Hadoop tracing settings"
-  echo " or"
-  echo "  CLASSNAME            run the class named CLASSNAME"
   echo ""
   echo "Most commands print help when invoked w/o parameters."
 }
diff --git a/hadoop-yarn-project/hadoop-yarn/bin/yarn b/hadoop-yarn-project/hadoop-yarn/bin/yarn
index ca7ee4c72cf..061fc6eac9d 100644
--- a/hadoop-yarn-project/hadoop-yarn/bin/yarn
+++ b/hadoop-yarn-project/hadoop-yarn/bin/yarn
@@ -65,8 +65,10 @@ HADOOP_LIBEXEC_DIR=${HADOOP_LIBEXEC_DIR:-$DEFAULT_LIBEXEC_DIR}
 . $HADOOP_LIBEXEC_DIR/yarn-config.sh
 
 function print_usage(){
-  echo "Usage: yarn [--config confdir] [--loglevel] COMMAND"
-  echo "where COMMAND is one of:"
+  echo "Usage: yarn [--config confdir] [COMMAND | CLASSNAME]"
+  echo "  CLASSNAME                             run the class named CLASSNAME"
+  echo " or"
+  echo "  where COMMAND is one of:"
   echo "  resourcemanager -format-state-store   deletes the RMStateStore"
   echo "  resourcemanager                       run the ResourceManager"
   echo "  nodemanager                           run a nodemanager on each slave"
@@ -89,8 +91,7 @@ function print_usage(){
   echo "                                        required libraries"
   echo "  daemonlog                             get/set the log level for each"
   echo "                                        daemon"
-  echo " or"
-  echo "  CLASSNAME                             run the class named CLASSNAME"
+  echo ""
   echo "Most commands print help when invoked w/o parameters."
 }