[DRBD-user] drbd90 unexpected split-brain, possible uuid_compare issue

[Jeremy Faith]

Hi,

drbd90 kernel module version:9.0.22-2
drbd90-utils:9.12.2-1
kernel:3.10.0-1127.18.2.el7.x86_64
pacemaker:1.1.21-4
corosync-2.4.5-4
system is centos:7.6

I have a 4 node test system(only ever 1 active primary) which is going split-brain unexpectedly.
n1 is the primary, n2/n3/n4 secondary.
System is being shutdown every night and sometimes on restart(particularly after weekend shutdown) some of the nodes are split-brain and require a full resync to fix.
Logs seem to indicate a problem with uuid_compare.