Play SQL is compatible with Java 6 but requires the users to bring their own Java-6-compatible driver (see specifications)
The version of Postgres shipped in Play SQL requires Java 7, and there's hardly anything we could do to detect a class-level exception beforehand,
We should at least warn users during setup, so they don't meet this issue.
Some users report "a crash" when opening Play SQL's index page. The log says:
This means they use Java 6.