I've updated from ejabberd 15.04 to 15.07 and MUC stopped working. (I copied the exact same config file). I can create a room and change options normally but when I send an invitation and the user tries to join I get the message 503 - Service Unavailable.
This is the muc config that was working fine before and stopped working:
mod_muc:
db_type: odbc
host: "chat.@HOST@"
access: muc
access_create: muc_admin
access_persistent: muc
access_admin: muc_admin
Any idea of what might be happening? I've read some stuff about DNS but to be honest this is all local and nothing has changed related with the network from one version to another
Here's the log. The first part is when I send the direct invitation and then accept to join the room using Adium.
Here is ejabberd config file: https://gist.github.com/nunohorta/b7e97503d3b7eb2921e0
I cleared the current database and MUC is working again.