the final line in the mvn helper script in build/ attempts to shut down the zinc server. due to the zinc server being set up w/a 30min timeout, by the time the mvn test instantiation finishes, the server times out.
this means that when the mvn script tries to shut down zinc, it returns w/an exit code of 1. this will then automatically fail the entire build (even if the build passes).
i propose the following:
1) up the timeout to 3h
2) put some logic at the end of the script to better handle killing the zinc server
PR coming now.