Hibernate 5 has updated dialects for various databases, and MySQL 8 has a special one of its own. Here's an example hibernate.cfg.xml for MySQL 8 for Hibernate 5 apps or newer.

Hibernate MySQL persistence XML file As MySQL installations continue to migrate and evolve to newer versions, the online JPA and Hibernate 5 tutorials haven’t kept up with quite as much vigor. As a ...

On the other hand, the second kind of open-source community may have a vendor that controls the project and the project could potentially be “purchased.” MySQL is one such example.

Both Fedora and openSUSE will be replacing Oracle's MySQL with its open-source fork--MariaDB.

With Oracle acquiring Sun Microsystems, it also acquires MySQL, the poster child for open-source applications. (Not to mention Solaris, which Sun says is a larger Linux distribution than Red Hat.