Hello, I've built openldap 2.4.45 on a CentOS 7.4.1708 machine with the following configuration:
I've seen this happen when a ulimit value was unreasonably small. Check the limits on -m or -v perhaps.
--Quanah -- Quanah Gibson-Mount Product Architect Symas Corporation Packaged, certified, and supported LDAP solutions powered by OpenLDAP: <http://www.symas.com>