[arch-general] mounted samba shares causing hang on shutdown/reboot

[David C. Rankin]

Guys,

   I'm wondering if I need to change the order of the processes in the DAEMONS 
line in rc.conf to prevent a hang on reboot/shutdown if smb shares are mounted. 
  It is almost a 3 minute hang:

Aug 19 16:42:01 providence postfix/qmgr[1316]: A178EA64CD: removed
Aug 19 16:43:13 providence smbd[29587]: [2011/08/19 16:43:13.608240,  0] 
printing/print_cups.c:110(cups_connect)
Aug 19 16:43:13 providence smbd[29587]:   Unable to connect to CUPS server 
192.168.7.15:631 - Connection refused
Aug 19 16:43:13 providence smbd[11057]: [2011/08/19 16:43:13.623014,  0] 
printing/print_cups.c:487(cups_async_callback)
Aug 19 16:43:13 providence smbd[11057]:   failed to retrieve printer list: 
NT_STATUS_UNSUCCESSFUL
Aug 19 16:44:49 providence shutdown[30753]: shutting down for system reboot
Aug 19 16:44:49 providence init: Switching to runlevel: 6

   Apparently, the unmount attempt happens immediately after the postfix 
shutdown and the total time between the time of hang and time of shutdown is 
2:48 seconds which seems like forever. (it's probably actually a 2:30 sec. 
timeout, with 18 secs burned somewhere else)

   The DAEMONS line I'm using is:

DAEMONS=(hwclock syslog-ng network hal @netfs @ntpd @sshd @crond !avahi-daemon 
@mysqld @postfix @cups @samba @apcupsd)

   From the error, it looks like smbd attempts to contact cups and gets a 
connection refused (I have 1 smb printer defined). I don't know whether this is 
a bug or a problem with the shutdown order. If I manually unmount the smb drives 
before calling shutdown, then there is no hang. However, I shouldn't need to 
manually unmount the smb drives as that should be handled automatically.

   I can obviously write a simple script that is called on shutdown that does 
the unmount, but I would rather see if I can identify and fix the issue 
correctly. Anybody have any thoughts on whether I should move things around in 
the DAEMONS line? Anybody else seeing this with mounted smb shares? The shares I 
have are these:

//phoenix/config on /mnt/phx-cfg type cifs (rw)
//phoenix/samba on /mnt/phx type cifs (rw)
//phoenix/david on /mnt/phx-david type cifs (rw)

   Any thoughts?  This isn't something that just started today. It has existed 
for a number of months, but I've just lived with it as this box is rarely 
rebooted except for kernel updates...

-- 
David C. Rankin, J.D.,P.E.