HADOOP-12451. Setting HADOOP_HOME explicitly should be allowed. Fixing bugs in

the first patch committed. (Karthik Kambatla via vinodkv)

(cherry picked from commit b742ea7fe677def932e94abfa7d3fcec80ccfd93)

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

@@ -251,14 +251,13 @@ TOOL_PATH="${TOOL_PATH:-$HADOOP_PREFIX/share/hadoop/tools/lib/*}"
 HADOOP_OPTS="$HADOOP_OPTS -Dhadoop.log.dir=$HADOOP_LOG_DIR"
 HADOOP_OPTS="$HADOOP_OPTS -Dhadoop.log.file=$HADOOP_LOGFILE"
 
-if [ "$HADOOP_HOME" = "" ]; then
-  HADOOP_HOME=$HADOOP_PREFIX
-fi
 if [ "$cygwin" = true ]; then
-  HADOOP_HOME=$(cygpath -w "$HADOOP_HOME" 2>/dev/null)
+  HADOOP_HOME=$(cygpath -w "$HADOOP_PREFIX" 2>/dev/null)
+  HADOOP_OPTS="$HADOOP_OPTS -Dhadoop.home.dir=$HADOOP_HOME"
+  export HADOOP_HOME
+else
+  HADOOP_OPTS="$HADOOP_OPTS -Dhadoop.home.dir=$HADOOP_PREFIX"
 fi
-export HADOOP_HOME
-HADOOP_OPTS="$HADOOP_OPTS -Dhadoop.home.dir=$HADOOP_HOME"
 HADOOP_OPTS="$HADOOP_OPTS -Dhadoop.id.str=$HADOOP_IDENT_STRING"
 HADOOP_OPTS="$HADOOP_OPTS -Dhadoop.root.logger=${HADOOP_ROOT_LOGGER:-${HADOOP_LOGLEVEL},console}"
 if [ "x$JAVA_LIBRARY_PATH" != "x" ]; then

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

@@ -312,12 +312,15 @@ YARN_OPTS="$YARN_OPTS -Dyarn.log.dir=$YARN_LOG_DIR"
 YARN_OPTS="$YARN_OPTS -Dhadoop.log.file=$YARN_LOGFILE"
 YARN_OPTS="$YARN_OPTS -Dyarn.log.file=$YARN_LOGFILE"
 YARN_OPTS="$YARN_OPTS -Dyarn.home.dir=$HADOOP_YARN_HOME"
-HADOOP_HOME=$HADOOP_PREFIX
+
 if $cygwin; then
-  HADOOP_HOME=$(cygpath -w "$HADOOP_HOME" 2>/dev/null)
+  HADOOP_HOME=$(cygpath -w "$HADOOP_PREFIX" 2>/dev/null)
+  YARN_OPTS="$YARN_OPTS -Dhadoop.home.dir=$HADOOP_HOME"
+  export HADOOP_HOME
+else
+  YARN_OPTS="$YARN_OPTS -Dhadoop.home.dir=$HADOOP_PREFIX"
 fi
-export HADOOP_HOME
-YARN_OPTS="$YARN_OPTS -Dhadoop.home.dir=$HADOOP_HOME"
+
 YARN_OPTS="$YARN_OPTS -Dhadoop.root.logger=${YARN_ROOT_LOGGER:-${HADOOP_LOGLEVEL},console}"
 YARN_OPTS="$YARN_OPTS -Dyarn.root.logger=${YARN_ROOT_LOGGER:-${HADOOP_LOGLEVEL},console}"
 if [ "x$JAVA_LIBRARY_PATH" != "x" ]; then