MariaDB on Windows Server - “mysql_upgrade_service” fails


Well-known member
I'm attempting to install MariaDB 10.0 (64-bit) on Windows Server 2008 R2 and I want to upgrade my existing MySQL service (and databases, of which I have three) to use MariaDB. I have MySQL 5.6.13.

My MySQL service is named "MySQL56". When stopping the service and running the MariaDB installer, the installer recognises an existing database instance and offers to upgrade these when the installer has completed. When the installer has finished, the Upgrade Wizard opens. This is all expected.

I select the service (MSQL56) and begin the wizard. It gets to phase five ("Running mysql_upgrade") and then returns an error saying "mysql_upgrade" could not continue.

When I run mysql_upgrade_service through the command line, the same thing happens - it fails on phase 5 - and says that a log is available. When I check the location given, there is no log created, nor had one ever been created.

Does anyone know how could I get more details about why it is failing on the "mysql_upgrade" phase?