Java 7 upgraded to OpenJDK 7u71
Change effective on 21 January 2015
Heroku’s support for Java 7 has been upgraded to OpenJDK 7u71. This change affects all Java, Scala, Clojure and Groovy applications with the following setting in their
This change will only take effect after your application’s next deployment. Heroku’s Java 8 support remains at version 8u20 and is still the default version when a
system.properties file is not present.