I have been in contact with the maintainer of java-grok about the status of the project and I am happy to say that there has been activity today <http://airmail.calendar/2018-04-13%2012:00:00%20EDT>, as well as some steps to move it forward and pull some forks back in.
https://groups.google.com/forum/#!forum/java-grok has been created to discuss the project. I would recommend anyone interested join up and we can see about getting it active. ottO
