[cups.general] Unable to create job status pipes - Toomany openfiles.

[Joost Cogels]

Michael Sweet wrote:
> Joost Cogels wrote:
>> Michael Sweet wrote:
>>> Joost Cogels wrote:
>>>> Hi,
>>>>
>>>> We are currently running into problems with the cups-1.2b2-rhel4 
>>>> package, used in combination with Samba to provide printing 
>>>> services to Windows clients. CUPS seems to run fine for a while, 
>>>> but after a while it stops printing. The following lines can be 
>>>> found in /var/log/cups/error_log:
>>>>> E [14/Mar/2006:14:01:33 +0100] Unable to create job status pipes - 
>>>>> Too many open files.
>>>>>
>>>>> E [14/Mar/2006:14:03:19 +0100] Unable to open "/dev/null" - Too 
>>>>> many open files.
>>>> Any idea what could be causing the "Too many open files" errors?
>>>
>>> How many clients are connected when you see this message?
>> CUPS is configured for up to 100 clients. Maximum clients connected 
>> should be no more then about 25.
>>>
>>> How many active jobs do you have?
>> Active Jobs average will be about 10 per minute I guess.
>
> Um, that's a lot for such a low number of clients.  Are you sure?
The users are in our case the servers from which the jobs are submitted, 
plus a few workstations.
>
>>>
>>> Have you set MaxClients to any particular value in cupsd.conf?
>> MaxClients is not set in cupsd.conf.
>>>
>>> What does "limit" show?
>>>
>> Michael,
>>
>> At first lots of the following messages get logged:
>>
>> Started backend /usr/lib/cups/backend/socket (PID 7882) for job 68531.
>> Started backend /usr/lib/cups/backend/socket (PID 7883) for job 68532.
>>
>> After a while the system grinds to a halt:
>
> How many printers do you have?
138
>
>>
>> Started backend /usr/lib/cups/backend/socket (PID 7952) for job 68583.
>> [Job 68583] /usr/lib/cups/backend/socket: Too many open files
>> PID 7952 (/usr/lib/cups/backend/socket) stopped with status 24!
>>
>> Then messages like the following are logged when starting new jobs:
>>
>> Unable to open "/dev/null" - Too many open files.
>> Unable to create job status pipes - Too many open files.
>>
>> Regards,
>> Joost
>>
>
>