Clojure support removes JVM_OPTS

Change effective on 12 October 2015

The Clojure buildpack no longer adds the JVM_OPTS configuration variable to your application by default. If you are already using JVM_OPTS in your Procfile or config vars, there is no change required. However, it is recommended that Clojure applications use the standard Java environment variables provided by the platform. These defaults are preferred because they will be scaled automatically with the dyno size.

For more information, see the Dev Center article on Heroku Clojure Support.