Sonar Qube 404 error

If the Sonar runner throw localhost/9000 unreachable with 404 code, try to upgrade the Sonar DB. (Need to up and running Sonar Qube server)

Below is the upgrade url.

http://127.0.0.1:9000/setup

More info:
http://stackoverflow.com/questions/32097414/error-sonar-server-http-localhost9000-can-not-be-reached