[Samba] Network Meltdown after Samba 4.9.0 Upgrade

[Rowland Penny]

On Sat, 15 Sep 2018 12:52:52 +1000
Reuben Farrelly via samba <samba at lists.samba.org> wrote:

> Hi,
> 
> Last night I attempted to upgrade from Samba 4.8.5 to 4.9.0, with 
> disastrous results.  Upon starting Samba 4.9.0 my entire network came
> to a screaming halt a few seconds later, and upon shutting Samba down
> it came back to life again.
> 
> The config is very basic:

and wrong

> 
> thunderstorm ~ # testparm
> Load smb config files from /etc/samba/smb.conf
> rlimit_max: increasing rlimit_max (1024) to minimum Windows limit
> (16384) Processing section "[homes]"
> Processing section "[root]"
> Processing section "[photos]"
> Processing section "[store]"
> Loaded services file OK.
> Server role: ROLE_STANDALONE
> 
> Press enter to see a dump of your service definitions
> 
> # Global parameters
> [global]
>          domain master = Yes
>          security = USER
>          server role = standalone server

NOTE: I have shrunk your smb.conf for clarity.

It is undoubtedly for a 'standalone server', so why does it also have
the line 'domain master = Yes' ??
It cannot be both, I would suggest removing this line.

Rowland