Just wanted to point out that on the recent bump to Tornado 5.x Travis started having trouble given the older python version it was running. I moved us up off of Trusty Ubuntu to Xenial and It seemed to solve the problem:
https://github.com/apache/tinkerpop/pull/1212/commits/db42513018820081cb50a8e6917b8426a0fec679 I did try Bionic but it seems that Travis didn't support java 8 directly on that platform. We would need to do our own install there. I imagine that's a problem for the future for our pre-Java 11 builds which will likely be 3.3.x and 3.4.x. Perhaps those branches for travis will just stay on Xenial.
