I'm not seeing anything obvious, but in both cases, slapd log files look very similar to this. Attached.

On Thu, Jan 11, 2018 at 3:30 PM, Rob Crittenden <rcritten@redhat.com> wrote:
Michael S. Moody via FreeIPA-users wrote:
> Within the last week, in two completely separate environments, I've had
> a first master go where the Directory Server won't stay running, and as
> a result, pki-tomcatd, and other services will never start. This has
> happened in two completely separate distinct environments. I've had to
> basically fix it by uninstalling the first master, and putting it back.
>
> Does anyone have any idea why? Is there a bug that started very
> recently? Both on CentOS 7, both slightly different releases of FreeIPA.

Check abrt and /var/log/messages to see if ns-slapd is crashing. If it
is then see
http://directory.fedoraproject.org/docs/389ds/FAQ/faq.html#debugging-crashes

rob