I spent a good chunk of my day trying to figure out why I couldn't get cider to work with my Clojure project in emacs. This blog is both a workaround for fellow travelers and my "pastebin" details for the help I'm going to request to get this fixed Background At some point in the last couple of months OpenJdk stopped working with Cider. Whenever I tried to run cider-jack-in I got the following error: