There's a pull request out there right now from Marc of HadoopMarc fame (I think I have the name cross referenced properly) that adds a kerberos implementation to Gremlin Server for 3.3.0. It has nice tests and some good documentation. It's also been reviewed by Mike Adamson who did the early good work to integrate SASL to Gremlin Server for us and he's happy with it at this point.
https://github.com/apache/tinkerpop/pull/534 Any committers care to review/vote on that one?
