M1,M2,M3 are 3 machines running Debian GNU/Linux 11 (bullseye)
recently (june2024) after apt update & upgrade
M1 & M2 are MariaDB nodes Ver 15.1 Distrib 10.6.18-MariaDB
M3 is arbitrator using galera-arbitrator-4 Ver 4.11.r
The problem is M3 because garbd joins the cluster (/var/log/syslog), but after 2s fails with
FATAL: ./gcs/src/gcs_group.cpp:group_check_proto_ver():329: Group requested gcs_proto_ver: 3, max supported by this node: 2.Upgrade the node before joining this group.Need to abort.
I didn’t found any config for garbd to set gcs_proto_ver in /etc/defaults/garbd
or a source for galera-arbitrator to change code and recompile
Hopefully there is someone there with an elegant solution to avoid installing MariaDB as 3rd node on M3
Thanks