Tomcat will not start and complains that port 8080 is already in use. When accessing the site via a web browser you get a '503 - Service Unavailable' error.
Be sure that the
APP_SERVER_PORT input variable on your template is set to 8000 (the default) and not 8080. Tomcat uses port 8080, but the
APP_SERVER_PORT is the port that HA PROXY forwards traffic to and should be set to 8000.