[Samba] Samba freezes

[Andrew Bartlett]

On Mon, 2017-06-26 at 08:01 +0100, Rowland Penny via samba wrote:
> On Mon, 26 Jun 2017 09:34:35 +1200
> Andrew Bartlett <abartlet at samba.org> wrote:
> 
> > On Sun, 2017-06-25 at 17:54 +0100, Rowland Penny via samba wrote:
> > > On Sun, 25 Jun 2017 18:11:05 +0200
> > > Antoine Huchet via samba <samba at lists.samba.org> wrote:
> > > 
> > > > Hello,
> > > > 
> > > > I have Samba 4.5.8-Debian running on Debian Stretch.
> > > > I use Samba to load games over my local network from my Debian
> > > > machine to my Playstation 2 (using OpenPS2Loader:
> > > > https://github.com/Jay-Jay-OPL/OPL-Daily-Builds).
> > > > 
> > > > From time to time, the game freezes, then after 5 minutes it comes
> > > > back (sometimes it doesn't, depends on the game).
> > > > 
> > > > 
> > > > And here is the syslog at the same time:
> > > > 
> > > > > Jun 25 16:39:01 serveur CRON[23116]: (root) CMD (  [ -x
> > > > > /usr/lib/php5/sessionclean ] && /usr/lib/php5/sessionclean)
> > > > > Jun 25 16:41:05 serveur dhclient[717]: DHCPREQUEST of
> > > > > 192.168.2.4 on eth0 to 192.168.2.1 port 67
> > > > > Jun 25 16:41:05 serveur dhclient[717]: DHCPACK of 192.168.2.4
> > > > > from 192.168.2.1
> > > > > Jun 25 16:41:05 serveur systemd[1]: Reloading Samba SMB Daemon.
> > > > > Jun 25 16:41:05 serveur systemd[1]: Reloaded Samba SMB Daemon.
> > > > > Jun 25 16:41:05 serveur dhclient[717]: bound to 192.168.2.4 --
> > > > > renewal in 2912 seconds.
> > > > 
> > > > From what I see, there is the usual stuff on top of the logs,
> > > > then it start echoing someting, then reloads and then it works
> > > > again...
> > > > 
> > > > Any idea what might be causing that?
> > > > 
> > > 
> > > It looks like your Samba machine is using DHCP and when it changes
> > > systemd reloads Samba, this will break any connections.
> > > 
> > > Try giving your machine a fixed IP instead.
> > > 
> > 
> > G'Day Rowland,
> > 
> > I think you are on to the right thing about the echo and DHCP, except
> > they are in other order.  
> 
> Hi Andrew,
> 
> The PC asks for an IP
> The PC gets the IP
> Systemd restarts Samba
> 
> I thought it was fairly obvious what the problem was, but you seem to
> see it differently, what I cannot understand, why is systemd restarting
> Samba ?

>From memory Debian-derived systems have a hook to communicate a DHCP
option to samba.  It isn't a restart, just a reload. 

But the echo packets are the sign the client is in trouble, in my view.

Andrew Bartlett
-- 
Andrew Bartlett                       http://samba.org/~abartlet/
Authentication Developer, Samba Team  http://samba.org
Samba Developer, Catalyst IT          http://catalyst.net.nz/services/samba