[Samba] many smbd processes when sync'ing sysvol

[Andrew Bartlett]

On Tue, 2013-05-07 at 21:55 +0100, Alex Matthews wrote:
> Hi there,
> 
> I have three S4 servers running as AD DCs.
> In order to keep the sysvol share in sync I'm using crontab to run the 
> following command:
> 
> /usr/bin/rsync -PavAX --delete root@<masterPDC>:/var/lib/samba/sysvol/ 
> /var/lib/samba/sysvol/
> 
> However everytime this command is run a couple of extra smbd processes 
> are started on the <masterPDC> (between 2 and 5 processes) which never 
> exit and just sit there taking up resources. So, quite quickly I had a 
> system with over 500 smbd processes and no free memory which very 
> abruptly fell over and stopped serving genuine clients.
> 
> Has anyone else come across this issue/know what is causing it?
> 
> I have taken some level 10 logs of the smbd processes that get formed. 
> However I don't have access to them from my current location. I will 
> email them in tomorrow from work.

My best guess is that the winbind part of samba's AD DC is making a
connection, but never closing it. 

Andrew Bartlett

-- 
Andrew Bartlett                                http://samba.org/~abartlet/
Authentication Developer, Samba Team           http://samba.org