I just wanted to chime in here on a fix for the the container seeming to not start properly.   There's no need to do a full appdata rollback usually.   Log into the container: docker exec -ti mariadb /bin/bash   run mysqld from the commandline and you'll get a full dump of what's wrong. It's likely *not* a corrupt database, but rather a transaction stuck in a partially completed state:   root@dc9091e5cc9e:/# mysqld blah blah blah blah InnoDB: Transaction 13
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