[debian-mysql] Bug#943974: mariadb-server-10.3: as "service mysql stop" fails, system refuse to shut down

[valette]

Package: mariadb-server-10.3
Version: 1:10.3.18-1
Severity: critical
Justification: breaks the whole system

after upgrade, each time I want to shut down, I get stuck in the shutdown
of mariadb database, that hangs forever.

Manually calling service stop for this service also hangs, as well as removal
propcedure as it aslo contains a service stop.

-- System Information:
Debian Release: bullseye/sid
  APT prefers unstable
  APT policy: (500, 'unstable'), (1, 'experimental')
Architecture: amd64 (x86_64)

Kernel: Linux 4.19.81 (SMP w/2 CPU cores; PREEMPT)
Kernel taint flags: TAINT_PROPRIETARY_MODULE, TAINT_OOT_MODULE
Locale: LANG=fr_FR.UTF8, LC_CTYPE=fr_FR.UTF8 (charmap=UTF-8), LANGUAGE= (charmap=UTF-8)
Shell: /bin/sh linked to /bin/bash
Init: systemd (via /run/systemd/system)

Versions of packages mariadb-server-10.3 depends on:
ii  adduser                   3.118
ii  debconf [debconf-2.0]     1.5.73
pn  galera-3                  <none>
ii  gawk                      1:4.2.1+dfsg-1.1
ii  iproute2                  5.3.0-1
ii  libc6                     2.29-3
ii  libdbi-perl               1.642-1+b2
ii  libgnutls30               3.6.10-3
ii  libpam0g                  1.3.1-5
ii  libstdc++6                9.2.1-16
ii  lsb-base                  11.1.0
ii  lsof                      4.93.2+dfsg-1
pn  mariadb-client-10.3       <none>
ii  mariadb-common            1:10.3.18-1
pn  mariadb-server-core-10.3  <none>
ii  passwd                    1:4.7-2
ii  perl                      5.30.1~rc1-1
ii  psmisc                    23.2-1+b1
ii  rsync                     3.1.3-8
ii  socat                     2.0.0~beta9-1
ii  zlib1g                    1:1.2.11.dfsg-1+b1

Versions of packages mariadb-server-10.3 recommends:
ii  libhtml-template-perl  2.97-1

Versions of packages mariadb-server-10.3 suggests:
ii  bsd-mailx [mailx]  8.1.2-0.20180807cvs-1+b1
ii  mailutils [mailx]  1:3.7-2
pn  mariadb-test       <none>
pn  netcat-openbsd     <none>
pn  tinyca             <none>