HI!
What does these messages (OpenLDAP 2.3.30) during startup mean? These OIDs are object classes subentry, alias and referral.
Dec 7 10:46:07 nb2 slapd[5158]: is_entry_objectclass("", "2.5.17.0") no objectClass attribute Dec 7 10:46:07 nb2 slapd[5158]: is_entry_objectclass("", "2.5.6.1") no objectClass attribute Dec 7 10:46:07 nb2 slapd[5158]: is_entry_objectclass("", "2.16.840.1.113730.3.2.6") no objectClass attribute
Should only occur if you have "" as suffix somewhere. It's been fixed in HEAD long ago, but only recently ported to re23 (they should disappear if you do a fresh checkout of re23).
In any case they're just harmless: testing for alias, referral and so on a dummy entry that has no objectClass attribute...
p.