https://bugs.openldap.org/show_bug.cgi?id=9466
--- Comment #2 from dpa-openldap@aegee.org dpa-openldap@aegee.org --- As a matter of fact I think it is not the retrieval of UID that fails, but the DNS loopups: I run openldap in way, that syncs from another host and in order to do the sync, the hostname of the master process must be resolved by terms of DNS lookup.
Acceptable or not, this was reported also in https://sourceware.org/bugzilla/show_bug.cgi?id=27389 and whether the behaivour (regression) shall be reverted was raised today at https://sourceware.org/pipermail/libc-alpha/2021-February/122714.html .