[avahi] accept(): Too many open files

[Mark Edwards]

On Mar 20, 2008, at 10:48 AM, Lennart Poettering wrote:

> On Thu, 20.03.08 02:56, Mark Edwards (mark at antsclimbtree.com) wrote:
>
>> Running Avahi 0.6.16 on Debian 4.0.  I get a series of messages like
>> the following each morning in the logs, like the following:
>>
>> Mar 18 04:00:07 sqwubbsy avahi-daemon[6062]: accept(): Too many open
>> files
>> Mar 18 04:00:08 sqwubbsy avahi-daemon[6062]: accept(): Too many open
>> files
>> Mar 18 04:00:11 sqwubbsy avahi-daemon[6062]: accept(): Too many open
>> files
>>
>> This happens at the same time, 4am.  It coincides with a set of
>> webmin cron jobs that presumably cause some kind of open file
>> exhaustion, similar to the following bug report:
>>
>> http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=461181
>>
>> I have tried doubling my /proc/sys/fs/file-max from the default of
>> 99196 to 198392, and it seems to have no effect.
>>
>> Can anyone here suggest something?  Thanks.
>
> Explore /proc/$(pidof avahi-daemon)/fd/ and find out to what file or
> other fd type all those open fds actually refer to.
>
> Histroic versions of Avahi didn't close all open fds on startup. So it
> maybe some program is leaking fds when starting Avahi? I remember some
> initng users having a problem like that with initng leaking fds like
> stupid or something like it.

I don't see a huge amount of files in /proc/$(pidof avahi-daemon)/fd/

I get a list like this:

lr-x------ 1 root root 64 2008-03-20 22:49 0 -> /dev/null
l-wx------ 1 root root 64 2008-03-20 22:49 1 -> /dev/null
l-wx------ 1 root root 64 2008-03-20 22:49 10 -> pipe:[1192423]
lrwx------ 1 root root 64 2008-03-20 22:49 11 -> socket:[1192424]
lrwx------ 1 root root 64 2008-03-20 22:49 12 -> socket:[1192426]
lrwx------ 1 root root 64 2008-03-20 22:49 13 -> socket:[1192428]
lrwx------ 1 root root 64 2008-03-20 22:49 14 -> socket:[1192429]
lrwx------ 1 root root 64 2008-03-20 22:49 15 -> socket:[1192430]
l-wx------ 1 root root 64 2008-03-20 22:49 2 -> /dev/null
lrwx------ 1 root root 64 2008-03-20 22:49 5 -> socket:[1192418]
lrwx------ 1 root root 64 2008-03-20 22:49 6 -> socket:[1192420]
lr-x------ 1 root root 64 2008-03-20 22:49 7 -> pipe:[1192422]
l-wx------ 1 root root 64 2008-03-20 22:49 8 -> pipe:[1192422]
lr-x------ 1 root root 64 2008-03-20 22:49 9 -> pipe:[1192423]

I'm kind of at a loss as to what I'm looking for here.  Again, this  
is only happening at 4:00am each day, and the only thing I can see  
happening in particular at that point is a bunch of cron jobs  
occurring at the same time.

Thanks.

--
Mark Edwards