Comment 2 for bug 1890029

Your bug misses the error logs one would usually attach, but from the bit I see it seems your server failed to (re-)start.

But a service (re)start is a requirement for an upgrade - since the file is missing I recommend you check /var/log/mysql/error.log which often has more info why it failed to start.

Resolving these issues you find in there and re-installing the package usually helps.