# path to Java
export JAVA_HOME=/usr/jdk64/jdk1.8.0_77

# extend PATH with mongodb and java home directory/bin

export PATH=/usr/mongodb/bin:$PATH:${JAVA_HOME}/bin

# place tools.jar (which contains com.sun.tools.javac.Main) 
# into hadoop classpath

export HADOOP_CLASSPATH=${JAVA_HOME}/lib/tools.jar