[Samba] dns terminated with signal 11

[basti.mueller31 at web.de]

Hi,

I did a big mistake. Since 2 weeks my upgrade samba-ad works perfect. 

Today I tried (I know it was dump) to add "www" as CNAME Alias Name (FQDN: www.example.com) to my DNS..The reason I did this was to fix my dns-problem (Domain name and public website have the same name ("example.com")).

I deleted this entry after 5min.

But after all of this my dns gets terminated randomly. As you can see via "systemctl status samba-ad-dc":


samba-ad-dc.service - Samba AD Daemon
   Loaded: loaded (/lib/systemd/system/samba-ad-dc.service; enabled; vendor preset: enabled)
   Active: active (running) since Wed 2018-08-29 09:59:35 CEST; 1h 29min ago
--
Aug 29 11:22:15 server samba[8649]:   Child 8664 (dns) terminated with signal 11

after restarting the service everything works fine...sometimes for 10min or as you can see above 1h 30min..

Is there maybe any cache I can clean or any log I can check?

Thanks!