We need to update the JDBC driver for MySQL, especially for security reasons.
Administrators need to check if the time zone is set on their databases. The new driver will not accept an undefined timezone and make an exception about CEST timezone. This can be done with:
SET GLOBAL time_zone = 'Europe/Zurich';
The following parameter in olat.local.properties needs to checked:
The connection collation attribute is mandatory for some rare queries in OpenOlat. Set this attribute with the same collation you use in your database.