[SSSD-users] sssd cache issues

[jupiter]

Hi,

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.

After searching from Internet, someone suggested to run sss_cache -E to
invalidate all cached entries would solve the problem, I tried, it did not
work.

Could anyone explain what is the issue in sssd cache, and give an effective
way to fix the problem?

Thank  you.

Kind regards,

- h