From 142b34f065e3e6b2b1d784478ec29d10a6fea123 Mon Sep 17 00:00:00 2001
From: Robert Joseph Evans <bobby@apache.org>
Date: Wed, 25 Jan 2012 21:28:49 +0000
Subject: [PATCH] merge MAPREDUCE-3194

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-0.23@1235959 13f79535-47bb-0310-9956-ffa450edef68
---
 hadoop-mapreduce-project/CHANGES.txt |  3 +++
 hadoop-mapreduce-project/bin/mapred  | 21 ++++++++-------------
 2 files changed, 11 insertions(+), 13 deletions(-)

diff --git a/hadoop-mapreduce-project/CHANGES.txt b/hadoop-mapreduce-project/CHANGES.txt
index 0fc6b385df2..3c5eb067d01 100644
--- a/hadoop-mapreduce-project/CHANGES.txt
+++ b/hadoop-mapreduce-project/CHANGES.txt
@@ -154,6 +154,9 @@ Release 0.23.1 - Unreleased
     for every event slowing down AM. (Siddarth Seth via vinodkv)
 
   BUG FIXES
+    MAPREDUCE-3194. "mapred mradmin" command is broken in mrv2
+                     (Jason Lowe via bobby)
+
     MAPREDUCE-3462. Fix Gridmix JUnit testcase failures. 
                     (Ravi Prakash and Ravi Gummadi via amarrk)
 
diff --git a/hadoop-mapreduce-project/bin/mapred b/hadoop-mapreduce-project/bin/mapred
index de82a03422f..2ffe9049170 100755
--- a/hadoop-mapreduce-project/bin/mapred
+++ b/hadoop-mapreduce-project/bin/mapred
@@ -30,9 +30,6 @@ fi
 function print_usage(){
   echo "Usage: mapred [--config confdir] COMMAND"
   echo "       where COMMAND is one of:"
-  echo "  mradmin              run a Map-Reduce admin client"
-  echo "  jobtracker           run the MapReduce job Tracker node" 
-  echo "  tasktracker          run a MapReduce task Tracker node" 
   echo "  pipes                run a Pipes job"
   echo "  job                  manipulate MapReduce jobs"
   echo "  queue                get information regarding JobQueues"
@@ -51,16 +48,7 @@ fi
 COMMAND=$1
 shift
 
-if [ "$COMMAND" = "mradmin" ] ; then
-  CLASS=org.apache.hadoop.mapred.tools.MRAdmin
-  HADOOP_OPTS="$HADOOP_OPTS $HADOOP_CLIENT_OPTS"
-elif [ "$COMMAND" = "jobtracker" ] ; then
-  CLASS=org.apache.hadoop.mapred.JobTracker
-  HADOOP_OPTS="$HADOOP_OPTS $HADOOP_JOBTRACKER_OPTS"
-elif [ "$COMMAND" = "tasktracker" ] ; then
-  CLASS=org.apache.hadoop.mapred.TaskTracker
-  HADOOP_OPTS="$HADOOP_OPTS $HADOOP_TASKTRACKER_OPTS"
-elif [ "$COMMAND" = "job" ] ; then
+if [ "$COMMAND" = "job" ] ; then
   CLASS=org.apache.hadoop.mapred.JobClient
 elif [ "$COMMAND" = "queue" ] ; then
   CLASS=org.apache.hadoop.mapred.JobQueueClient
@@ -75,6 +63,13 @@ elif [ "$COMMAND" = "classpath" ] ; then
 elif [ "$COMMAND" = "groups" ] ; then
   CLASS=org.apache.hadoop.mapred.tools.GetGroups
   HADOOP_OPTS="$HADOOP_OPTS $HADOOP_CLIENT_OPTS"
+elif [ "$COMMAND" = "mradmin" ] \
+    || [ "$COMMAND" = "jobtracker" ] \
+    || [ "$COMMAND" = "tasktracker" ] ; then
+  echo "Sorry, the $COMMAND command is no longer supported."
+  echo "You may find similar functionality with the \"yarn\" shell command."
+  print_usage
+  exit
 else
   echo $COMMAND - invalid command
   print_usage