When we have enabled user & group search (ranger.usersync.group.search.first.enabled = false) we expect Ranger to get the groups and its members and compare them to what already exists.
Our DN/CN looks like this:
Our CN contains a comma but the getShortUserName method in LdapDeltaUserGroupBuilder has this piece of code:
The intention is that it gets the "CN=Francke\, Lars" part (the first part of the comma-separated DN) but that doesn't work if that contains a comma itself. It is escaped but Ranger just splits at the comma. That's definitely a bug. It should use the LdapName class instead and/or parse according to the RFC 2253 but maybe even that is wrong what it really should probably do is the same as user sync?
This way we currently cannot use (incremental) group sync at all because if we do we don't get any groups at all as the user search doesn't take its own groups when group sync is also enabled (this was another surprise).