There are two options for how to run the Cruise Control webserver, using Vert.x or Jetty. The Jetty webserver is enabled, used by default, and works as expected while the Vert.x webserver implementation is disabled and broken. The Vert.x webserver implementation does not work out of the box (activated by `vertx.enabled=true` in the Cruise Control server configuration) and appears to have been broken for at least a year. It's also worth noting that there are no existing unit or integration tests for the Vert.x webserver implementation upstream (hence probably why this issue started and was undetected for some time)