we have another host with same version and suppose same cfg but never saw the error,
[24/Jun/2020:09:22:54.687024072 -0700] - ERR - Security Initialization - _conf_setallciphers - Failed to get the default state of cipher (null)
I'm curious - how did you make a host with the same config? Normally with 389 you need to configure both individually to look the same but you can't copy-paste config files etc.
My guess here is that perhaps your nss db isn't configured properly, so I'd want to see the output of certutil -L -d /etc/dirsrv/slapd-<instance>/ on the affected host.
— Sincerely,
William Brown
Senior Software Engineer, 389 Directory Server SUSE Labs