https://github.com/hibernate/hibernate-search/commit/30d61116fd4d01c1c900897744488c5556e61813 partially fixes the issue by making the test working in Eclipse and when you specify a database profile. But it fails with Maven when you don't specify a database profile.

We need to be very cautious to using the same properties to define the driver/datasource. Currently, we use partly the HikariCP datasourceClassName and partly driverClassName and HikariCP fails when both are configured.