[avahi] Unexpected resolution failures

[Sebastien Estienne]

On 8/25/06, Lennart Poettering <lennart at poettering.net> wrote:
> On Fri, 25.08.06 10:40, Ludovic Courtès (ludovic.courtes at laas.fr) wrote:
>
> > Hi,
> >
> > At my office, I often notice that, after `avahi-daemon' has been running
> > for some time, several services suddenly become "unresolvable".
> > Restarting the daemon magically makes them resolvable again.
> > Concretely, here is what I observe:
> >
> >   $ avahi-browse -rk _daap._tcp
> >   + eth0 IPv4 Juan                                          _daap._tcp           local
> >   + eth0 IPv4 civodul                                       _daap._tcp           local
> >   + eth0 IPv4 Marc                                          _daap._tcp           local
> >   Failed to resolve service 'Juan' of type '_daap._tcp' in domain 'local': Timeout reached
> >   Failed to resolve service 'civodul' of type '_daap._tcp' in domain 'local': Timeout reached
> >   Failed to resolve service 'Marc' of type '_daap._tcp' in domain 'local': Timeout reached
> >   Got SIGINT, quitting.
>
> Is any of these three services on the local machine?
>
> Do the other machines run Avahi or native Bonjour?
>
> > Is it something that other people already experienced?  If not, how can
> > I provide more useful information?
>
> Nope, I for sure didn't experience that.
>
> Could you please capture the mDNS traffic that happens when you call
> avahi-browse like you did above?
>
> Use this:
>    tcpdump -i eth0 -n -w avahi.tcpdump udp port 5353
>
> And send me the file avahi.tcpdump that this call creates.
>
> Start tcpdump shortly before (10s) calling avahi-browse, and stop it shortly
> after (10s).
>
> Does the local machine run any application that browses for _daap._tcp
> during the whole time? (i.e. the service-discovery-applet or rhythmbox or
> whatever)
>
> One final request: could you please do a "killall -USR1 avahi-daemon"
> once before doing that avahi-browse call (10s before) and once after
> (10s after) and sent me the ouput the daemon prints to syslog? It
> contains the mDNS cache.
>

we should put this on the wiki -> debugging avahi or submitting bug report

> Thank you very much in advance,
>
> Lennart
>
> --
> Lennart Poettering; lennart [at] poettering [dot] net
> ICQ# 11060553; GPG 0x1A015CC4; http://0pointer.net/lennart/
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-- 
Sebastien Estienne