[jadmin] mu-conference is acting weird...

[Arnaud Abélard]

Hello,

Lately one of our 2 jcr-muc started lagging very badly, a restart would 
fix the lag, but a few days later that would happen again.

I straced the process and got very suprised by what i got:

there was hundreds of messages like this one per seconds:

read(6, "<message xmlns=\'jabber:client\' type=\'error\' 
to=\'informatique at conferences.jabber.etu.univ-nantes.fr\'
from=\' lol bah javais pas vu ton message quand j&apos;ai \303\251cris 
le mien
(meme quand j&apos;ai fais aper\303\247u d&apos;ailleurs, enfin je crois)\'>
<error code=\'404\' type=\'cancel\'><remote-server-not-found/></error>
<error type=\'cancel\' code=\'404\'><remote-server-not-found/></error>
<error code=\'404\' type=\'cancel\'><remote-server-not-found/></error>
<error type=\'cancel\' code=\'404\'><remote-server-not-found/>
</error><error code=\'404\' type=\'cancel\'><remote-server-not-found/>
</error><error type=\'cancel\' code=\'404\'><remote-server-not-found/>
</error><error code=\'404\' type=\'cancel\'><remote-server-not-found/>
</error><error type=\'cancel\' code=\'404\'><remote-server-not-found/>
</error><error code=\'404\' type=\'cancel\'><remote-server-not-found/>
</error><error type=\'cancel\' code=\'404\'><remote-server-not-found/>
</error><error code=\'404\' type=\'cancel\'><remote-server-not-found/>
</error><error type=\'cancel\' code=\'404\'><"..., 8191) = 8191

i decided to check my jabber server logs and i got even more surprized:
there was hundreds of messages like this one, obviously caught in a loop:

Nov 21 19:14:27 jabber.Etu.univ-nantes.fr jabberd/resolver[24479]: [ lol 
bah javais pas vu ton message quand j'ai C)cris
le mien (meme quand j'ai fais aperC'u d'ailleurs, enfin je crois)] could 
not be resolved
Nov 21 19:14:27 jabber.Etu.univ-nantes.fr jabberd/s2s[24488]: dns lookup 
for  lol bah javais pas vu ton message quand
j'ai C)cris le mien (meme quand j'ai fais aperC'u d'ailleurs, enfin je 
crois) failed

how did messages sent to a muc ended in the s2s & resolver?!?

if you have the slighest idea of what is going on, thanks in advance.

Arnaud

-- 
Arnaud Abélard (jabber: arnaud.abelard at univ-nantes.fr)
Administrateur Système
Centre de Ressources Informatiques
Université de Nantes
-
ne pas utiliser: trapemail at univ-nantes.fr