[Mailman-Users] Site list is missing: mailman

[cesco]

Hi

on a RHEL6.4 with mailman-2.1.12-18 on amd64, I'm trying to run mailman 
with all his /var/lib/mailman stuff (archives, data, lists, spam)stored 
on a lustre 2.1.5 filesystem.

when I try to start mailman (either '/usr/lib/mailman/bin/mailmanctl 
start' or '/etc/init.d/mailman start') it says:

Site list is missing: mailman

and in /var/log/mailman/error

Apr 24 15:53:17 2013 (30798) IOError reading list extension: [Errno 13] 
Permission denied: '/irafs0/mailman/lists/mailman/extend.py'
Apr 24 15:53:17 2013 mailmanctl(30798): Site list is missing: mailman
Apr 24 15:53:17 2013 (30798) Site list is missing: mailman

VAR_PREFIX is set to '/irafs0/mailman' in both Defaults.py and mm_cfg.py 
for https://bugs.launchpad.net/mailman/+bug/925502

ls -ls /irafs0/mailman/lists/mailman/config.pck
4 -rw-rw---- 1 mailman mailman 3763 Apr 23 12:00 
/irafs0/mailman/lists/mailman/config.pck

I'm suspecting that can be some lock problem. I tried to mount the 
lustre volume with nolock, localflock and flock, but nothing changes.

any hints?
thank

francesco