This error occurs only when I try to shutdown my pc, that was before in sleep mode Then my pc cannot shutdown with the following error message:
a stop job is running for MySQL server
When I issue stop service command before sleep everything is ok
System: OpenSuse Tumbleweed Linux my.site 4.18.11-1-default #1 SMP PREEMPT Sat Sep 29 11:29:05 UTC 2018 (4a5c1c1) x86_64 x86_64 x86_64 GNU/Linux
MariaDB mysql Ver 15.1 Distrib 10.2.18-MariaDB, for Linux (x86_64) using readline 5.1
Upgrading the problem solved with kernel 4.19.