Package: ejabberd
Followup-For: Bug #931211

Hi,

while taking a look at this I run into an interesting discussion here:
https://github.com/processone/ejabberd/issues/528

The scenario is different but the log message matches the one in this
report.

In that case the problem seemed to be related to name resolution in
erlang, and not strictly an ejabberd issue.

The fact that the issue here started with a buster upgrade might be due
to a change in behavior in erlang internals, which might have broken
ejabberd assumptions is some corner case.

The log message posted by Marco points out to this line in erlang:
https://sources.debian.org/src/erlang/1:21.2.6+dfsg-1/lib/kernel/src/inet_dns.erl/#L694

And the "empty" label mentioned in the comment could be the last entry
in the log message:

... [<<"_xmpps-server">>,<<"_tcp">>,<<"jabber">>,<<"seeweb">>,<<"it">>,<<>>]
                                                                       ^^^^

In the discussion above, one possible cause is said to be extra trailing
dots in FQDNs.

Is it possible that the issue Marco is experiencing is caused by
something like that?

I didn't notice anything strange in posted config, but what about DNS
records or entries in /etc/hosts?

Ciao,
   Antonio

-- 
Antonio Ospite
https://ao2.it
https://twitter.com/ao2it

A: Because it messes up the order in which people normally read text.
   See http://en.wikipedia.org/wiki/Posting_style
Q: Why is top-posting such a bad thing?

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