We are running sssd version 1.12.4-47 on CentOS 6. It works fine in general, but from time to time, some nodes listed all user ids with "nobody", calling id username immediatly returned "No such user", it looks the id went to cache and did not contact to the LDAP.

On one occasion, I added debug_level = 6 to the sssd.conf, restarted sssd, the "nobody" was gone and id username was returned correct LDAP user id. It did not make any sense to me how adding a debug_level could fix the problem. I could smell the issue from sssd cache, but I have no idea since the all default cache setting only for some seconds, but when the node caught in that problem, it can sit for many days with uids in nobody, id returns no such user.