(crossposting from the mailing list).
Hi all.
I'm getting an error creating a pubsub node from a custom module, and
hoping someone here can help. Everything works just fine when
ejabberd is not clustered. I recently moved to a clustered setup, and
started getting errors. Here's a bit of info.
pertinent mnesia configuration:
(ejabberd at jabber02)1> mnesia:info().
===> System info in version "4.4.13", debug level = none <===
opt_disc. Directory "/var/lib/ejabberd/db" is used.
use fallback at restart = false
running db nodes = ['ejabberd at jabber01','ejabberd at jabber02']
stopped db nodes = []
master node tables = []
remote = []
ram_copies = [anonymous,captcha,http_bind,iq_response,mod_register_ip,
pubsub_subscription,reg_users_counter,route,s2s,session,
session_counter]
disc_copies = [acl,caps_features,config,local_config,motd,motd_users,
passwd,privacy,private_storage,pubsub_index,pubsub_item,
pubsub_node,pubsub_state,roster,roster_version,schema,
vcard,vcard_search]
disc_only_copies = []
[{'ejabberd at jabber01',disc_copies},{'ejabberd at jabber02',disc_copies}] = [schema,
roster,
motd_users,
motd,
passwd,
config,
vcard_search,
privacy,
acl,
roster_version,
pubsub_index,
pubsub_state,
pubsub_node,
pubsub_item,
private_storage,
vcard]
[{'ejabberd at jabber01',ram_copies},{'ejabberd at jabber02',ram_copies}] = [captcha,
session_counter,
reg_users_counter,
anonymous,
s2s,
http_bind,
iq_response,
route,
session,
pubsub_subscription]
[{'ejabberd at jabber02',disc_copies}] = [caps_features,local_config]
[{'ejabberd at jabber02',ram_copies}] = [mod_register_ip]From the module, I construct and send a pubsub create request
send_pubsub() ->
To = "pubsub." ++ ?MYNAME,
From = #jid{user = "master", luser = "master", server = ?MYNAME, lserver = ?MYNAME, resource = "pubsub", lresource = "pubsub"},
Message = {xmlelement, "iq",
[{"type", "set"},
{"from", jlib:jid_to_string(From)},
{"to", To}],
[{xmlelement, "pubsub",
[{"xmlns", "http://jabber.org/protocol/pubsub"}],
[{xmlelement, "create", [{"node", "Test"}], []},
{xmlelement, "configure", [], []}]}]},
ejabberd_router:route(From, jlib:string_to_jid(To), Message).
And in the ejabberd log I see:
=ERROR REPORT==== 2010-05-19 17:01:02 ===
E(<0.312.0>:mod_pubsub:3686) : transaction return internal error: {atomic,
{'EXIT',
{aborted,
{cyclic,
'ejabberd@jabber01',
{pubsub_index,
node},
write,
write,
{tid,
1146520,
<10205.297.0>}}}}}
=ERROR REPORT==== 2010-05-19 17:01:02 ===
E(<0.312.0>:mod_pubsub:3686) : transaction return internal error: {atomic,
{'EXIT',
{aborted,
{cyclic,
'ejabberd@jabber02',
{pubsub_index,
node},
read,
read,
{tid,
1146520,
<10205.297.0>}}}}}
It's suspicious that there are two messages within the same second for
both nodes. Seems like an mnesia deadlock? Is it because I have RAM
and Disc copy set for the pubsub tables on both nodes or something
else entirely? Any help would be greatly appreciated. Thanks.
