As many of you know, we have a preview of the Vert.x 3 gateway sitting
in master (if you use Java 8); however, it uses a 3.1.0-SNAPSHOT build
as there are a few bug-fixes and features we require that haven't
been released yet. Unfortunately, it looks like someone pulled the
snapshot over the weekend, and the build fails at the moment.
If you've built any time recently, you likely have the artefacts you
need cached in your .m2 repo, and all will be well.
We'll be switching to a released version of Vert.x 3 ASAP, which seems
to be scheduled for the near future. If not, we'll have to take some
more drastic action until things are available.