svn merge -c 1325069 from trunk

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1325070 13f79535-47bb-0310-9956-ffa450edef68

hadoop-common-project/hadoop-common/CHANGES.txt

@@ -230,6 +230,9 @@ Release 2.0.0 - UNRELEASED
     HADOOP-8264. Remove irritating double double quotes in front of hostname
     (Bernd Fondermann via bobby)
 
+    HADOOP-8270. hadoop-daemon.sh stop action should return 0 for an
+    already stopped service. (Roman Shaposhnik via eli)
+
   BREAKDOWN OF HADOOP-7454 SUBTASKS
 
     HADOOP-7455. HA: Introduce HA Service Protocol Interface. (suresh)

hadoop-common-project/hadoop-common/src/main/bin/hadoop-daemon.sh

@@ -167,11 +167,9 @@ case $startStop in
         kill `cat $pid`
       else
         echo no $command to stop
-        exit 1
       fi
     else
       echo no $command to stop
-      exit 1
     fi
     ;;