kul: any particular reason to use c3p0? seems there are more modern alternatives that are under active development, such as hikari

Hurmm i thought c3p0 was de facto

Been using it for quite some time now

there's a pretty good (if biased) comparison here: https://github.com/brettwooldridge/HikariCP/wiki/Pool-Analysis

Nice will take a look

But i am not sure if test connection on check out is a good default to have