Bug#832637: cups-browsed: Shutdown hangs on A stop job runs for Make remote CUPS printers available locally

[Heinrich Schuchardt <xypron.glpk@gmx.de>]

On 08/21/2016 02:20 PM, Brian Potkin wrote:
> On Thu 28 Jul 2016 at 02:00:36 +0200, Heinrich Schuchardt wrote:
> 
> Thank you for your report, Heinrich.
>  
>> every time I shutdown my system I have to wait 90 s for a stop job
>> showing the message
> 
> Is this consistent behaviour?

Yes, this happened on every shut down until I uninstalled the package
cups-browsed.

> 
>> A stop job runs for Make remote CUPS printers available locally
> 
> This should not be happening since 1.9.0-1.
> 
>> Shutdown should be as fast as possible.
>>
>> The same job could be run in the background at any time.
>>
>> Typically systems are shutdown when leaving office and restarting
>> the system in another network with other printers.
>>
>> So looking for remote printers in a shutdown job does not
>> make much sense. If the job is needed at all, run it when
>> starting the system.
> 
> cups-browsed creates local print queues for remote queues when it starts
> up. These queues need removing when it closes down. To do this it needs
> the cups daemon to be running so that it can communicate with it and
> have it adjust the contents of /etc/cups/printer.conf.
> 
> Issue the command
> 
>   systemctl stop cups.service cups-browsed.service
> 
> It should complete almost immediately. Does it?

It stops immediately

> 
> Look at the output of 'journalctl'. It should show cups-browsed stopping
> before cups does. This allows communication between the two to continue
> and is an indication of what should happen at reboot or poweroff.

Aug 21 17:45:18 LT002 systemd[1]: Stopping Make remote CUPS printers
available locally...
Aug 21 17:45:18 LT002 systemd[1]: Stopped Make remote CUPS printers
available locally.
Aug 21 17:45:18 LT002 systemd[1]: Stopping CUPS Scheduler...
Aug 21 17:45:18 LT002 systemd[1]: Stopped CUPS Scheduler.
Aug 21 17:45:18 LT002 polkitd(authority=local)[2040]: Unregistered
Authentication Agent for unix-process:5935:652630 (system bus name
:1.75, object path /org/freedesktop/PolicyKit1/AuthenticationAgent,
locale de_DE.UTF-8) (disconnected from bus)

> 
> Please post the contents of cups-browsed.service and cups.service from
> /lib/systemd/system/.

cat /lib/systemd/system/cups-browsed.service
[Unit]
Description=Make remote CUPS printers available locally
Requires=cups.service
After=cups.service avahi-daemon.service
Wants=avahi-daemon.service

[Service]
ExecStart=/usr/sbin/cups-browsed

[Install]
WantedBy=multi-user.target


cat /lib/systemd/system/cups.service
[Unit]
Description=CUPS Scheduler
Documentation=man:cupsd(8)

[Service]
ExecStart=/usr/sbin/cupsd -l
Type=simple

[Install]
Also=cups.socket cups.path
WantedBy=printer.target




> 
> Regards,
> 
> Brian.
>