Merge -c 1228354 from trunk to branch-0.23 to fix MAPREDUCE-3624. Remove unnecessary dependency on JDK's tools.jar.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-0.23@1228355 13f79535-47bb-0310-9956-ffa450edef68

hadoop-mapreduce-project/CHANGES.txt

@@ -370,6 +370,9 @@ Release 0.23.1 - Unreleased
     yarn.resourcemanager.principal and yarn.nodemanager.principal. (Jonathan
     Eagles via acmurthy) 
 
+    MAPREDUCE-3624. Remove unnecessary dependency on JDK's tools.jar. (mahadev
+    via acmurthy)
+
 Release 0.23.0 - 2011-11-01 
 
   INCOMPATIBLE CHANGES

hadoop-mapreduce-project/hadoop-yarn/bin/yarn

@@ -110,7 +110,6 @@ if [ ! -d "$HADOOP_CONF_DIR" ]; then
 fi
 
 CLASSPATH="${HADOOP_CONF_DIR}:${YARN_CONF_DIR}:${CLASSPATH}"
-CLASSPATH=${CLASSPATH}:$JAVA_HOME/lib/tools.jar
 
 # for developers, add Hadoop classes to CLASSPATH
 if [ -d "$YARN_HOME/yarn-api/target/classes" ]; then