Arch Linux

Description:

After upgrading to systemd-240 mariadb would not start as galera_recovery is killed by OOM.
Tried to set OOMScoreAdjust=-900 for mariadb.service but same problem persists. With OOMScoreAdjust=-999 the system becomes unstable or crashes.
Downgrading to systemd-239.370 fixes this issue.

Additional info:
Confirmed affected on two 3-server mariadb + galera clusters with systemd 240.0-3, 240.34-2 and 240.34-3

Steps to reproduce:
Upgrade to systemd-240, after reboot mariadb (+galera) would not start:
/usr/bin/galera_recovery: line 71: 8976 Killed ./bin/mysqld --user=mysql --wsrep_recover --disable-log-error'

Downgrade to systemd 239.370 and mariadb (+galera) will start successfully.

I have added libsystemd systemd systemd-sysvcompat to IgnorePkg, this causes various systemd binaries to stop working with error while loading shared libraries: libidn2.so.0: cannot open shared object file: No such file or directory
Downgrading to libidn2-2.0.5-1 fixes systemd-239.370 but then pacman stopped working with pacman: error while loading shared libraries: libidn2.so.4: cannot open shared object file: No such file or directory so I ended up copying libidn2.so.0.3.4 from libidn2-2.0.5-1 to /lib to keep both systemd and pacman working after upgrading to libidn2-2.1.0-1