Build fail for Mesos 0.20

[atris]

I got :

[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.1:compile (default-compile) on project cf-tutorial-mesos-docker: Fatal error compiling: invalid target release: 1.7 -> [Help 1]

on Ubuntu 12.04. Please advice

(this is on running mvn package)

[chaubeau]

update your jdk version(1.7)