https://bugs.openldap.org/show_bug.cgi?id=10121
--- Comment #3 from 1010881517@qq.com --- (In reply to Quanah Gibson-Mount from comment #1)
I'm assuming you built openldap yourself. Did you actually enable CLDAP by defining "LDAP_CONNECTIONLESS" when building? It's an experimental feature that is only available when explicitly compiled with support for it.
I am sure this option has been turned on and I have found a similar issue in the email list: https://lists.openldap.org/hyperkitty/list/openldap-technical@openldap.org/m...