[debian-mysql] Bug#993219: Bug#993219: Bug#993219: mariadb-server-core: Akonadi database - mysql_upgrade fails always with "FATAL ERROR: Can't execute 'mysqlcheck'"

[Otto Kekäläinen]

> Btw. a successful migration should also take care of  the redo logs. The user
> normally does not know, whether the database was shut down correctly or not.

Maybe they should, or at least take a backup before a big upgrade so
they can go back to the old version when they see an error message
like this in the upgrade?

This error message is from the MariaDB server and not from the Debian
packaging scripts. You will get the exact same result on any distro if
you crash the database and then proceed to start it with another
version.

The software is open source, so if you have an idea how to avoid this
(e.g. how to tell users if their database crashed or how to do
database recovery in every possible situation), feel free to open a
pull request upstream at MariaDB Server.

- Otto