Hi Elvis! May I ask you to give me the content of your mariadb.service file (normally located in '/lib/systemd/system/mariadb.service').
Also, do you remember which version of MariaDB was installed on your debian stretch? Was it from the Debian repository or from the MariaDB foundation repository? And finally, did your previous setup once use sysvinit (not systemd)? For the moment, I am not able to reproduce the problem with those steps: 1/ install debian 9; 2/ install mariadb-server (10.1.45); 3/ change sources.list to upgrade to debian buster and apt upgrade; 4/ reboot; 5/ apt full-upgrade; 6/ mariadb-server is installed and up and running (10.3.22). -- Faustin Lammler GPG: F652 BCD1 1AA8 8975 F010 48A5 390A 2F27 832A 5C79
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