We need to set the JAVA HOME

add following into /etc/bashrc

export JAVA_HOME=/usr/lib/jvm/jre-1.7.0-openjdk/
I had to cd /usr/lib/jvm, then ln -s java-1.7.0-openjdk-1.7.0.85.x86_64/jre jre-1.7.0-openjdk