Ejabberd Disco Iteam not coming - mysql

Question

Vrsion: 17.11
Platform : ubuntu 16.04
With the mod_muc configuration, sometimes disco items does not load at all.
Here is a configuration I have used for disco items. Here is a crash log I found while crashes
mod_muc:
db_type: sql
default_room_options:
- allow_subscription: true
- mam: true
access_admin:
- allow: admin
access_create: muc_create
access_persistent: muc_create
history_size: 100
max_rooms_discoitems: 1000
max_user_conferences: 50
max_users_presence: 50
Also, while joining same muc which was earlier available does not get connection. If I restart the server, things works well and again after certain times muc s doesn't come
Error Log:
Stopping MUC room x#conference.host.com
2018-07-27 12:57:39.972 [error] <0.32056.26> gen_fsm <0.32056.26> in state normal_state terminated with reason: bad return value: ok
2018-07-27 12:57:39.972 [error] <0.32056.26>#p1_fsm:terminate:760 CRASH REPORT Process <0.32056.26> with 0 neighbours exited with reason: bad return value: ok in p1_fsm:terminate/8 line 760
2018-07-30 05:12:12 =ERROR REPORT====
** State machine <0.9190.27> terminating
** Last event in was {route,<<>>,{iq,<<"qM1F3-119">>,set,<<"en">>,{jid,<<"usr_name">>,<<"x.y.com">>,<<"1140">>,<<"usr_name">>,<<"x.y.com">>,<<"1140">>},{jid,<<"planet_discovery1532511384">>,<<"conference.x.y.com">>,<<>>,<<"planet_discovery1532511384">>,<<"conference.x.y.com">>,<<>>},[{xmlel,<<"query">>,[{<<"xmlns">>,<<"urn:xmpp:mam:2">>}],[{xmlel,<<"set">>,[{<<"xmlns">>,<<"http://jabber.org/protocol/rsm">>}],[{xmlel,<<"max">>,[],[{xmlcdata,<<"30">>}]},{xmlel,<<"after">>,[],[]}]},{xmlel,<<"x">>,[{<<"xmlns">>,<<"jabber:x:data">>},{<<"type">>,<<"submit">>}],[{xmlel,<<"field">>,[{<<"var">>,<<"FORM_TYPE">>},{<<"type">>,<<"hidden">>}],[{xmlel,<<"value">>,[],[{xmlcdata,<<"urn:xmpp:mam:2">>}]}]}]}]}],#{ip => {0,0,0,0,0,65535,46291,27829}}}}
** When State == normal_state
** Data == {state,<<"planet_discovery1532511384">>,
<<"conference.x.y.com">>,<<"x.y.com">>,{all,muc_create,[{allow,
[{acl,admin}]}],muc_create},{jid,<<"planet_discovery1532511384">>,<<"conference.x.y.com">>,<<>>,<<"planet_discovery1532511384">>,<<"conference.x.y.com">>,<<>>},{config,<<"Planet Discovery">>,<<>>,true,true,true,anyone,true,true,false,true,true,true,false,true,true,true,true,false,<<>>,true,[moderator,participant,visitor],true,1800,200,false,<<>>,{0,nil},true},{dict,1,16,16,8,80,48,{[],[],[],[],[],[],[],[],[],[],[],[],[],[],[],[]},{{[],[],[],[],[],[[{<<"usr_name">>,<<"x.y.com">>,<<"1140">>}|{x.y.com,{jid,<<"usr_name">>,<<"x.y.com">>,<<"1140">>,<<"usr_name">>,<<"x.y.com">>,<<"1140">>},<<"usr_name#x.y.com/1140">>,moderator,{presence,<<"qM1F3-116">>,available,<<"en">>,{jid,<<"usr_name">>,<<"x.y.com">>,<<"1140">>,<<"usr_name">>,<<"x.y.com">>,<<"1140">>},{jid,<<"planet_discovery1532511384">>,<<"conference.x.y.com">>,<<"usr_name#x.y.com/1140">>,<<"planet_discovery1532511384">>,<<"conference.x.y.com">>,<<"usr_name#x.y.com/1140">>},undefined,[],undefined,[{xmlel,<<"c">>,[{<<"xmlns">>,<<"http://jabber.org/protocol/caps">>},{<<"hash">>,<<"sha-1">>},{<<"node">>,<<"http://www.igniterealtime.org/projects/smack">>},{<<"ver">>,<<"p801v5l0jeGbLCy09wmWvQCQ7Ok=">>}],[]},{vcard_xupdate,{<<>>,<<>>},undefined}],#{ip => {0,0,0,0,0,65535,46291,27829}}}}]],[],[],[],[],[],[],[],[],[],[]}}},{dict,0,16,16,8,80,48,{[],[],[],[],[],[],[],[],[],[],[],[],[],[],[],[]},{{[],[],[],[],[],[],[],[],[],[],[],[],[],[],[],[]}}},{dict,0,16,16,8,80,48,{[],[],[],[],[],[],[],[],[],[],[],[],[],[],[],[]},{{[],[],[],[],[],[],[],[],[],[],[],[],[],[],[],[]}}},nil,{dict,0,16,16,8,80,48,{[],[],[],[],[],[],[],[],[],[],[],[],[],[],[],[]},{{[],[],[],[],[],[],[],[],[],[],[],[],[],[],[],[]}}},{dict,1,16,16,8,80,48,{[],[],[],[],[],[],[],[],[],[],[],[],[],[],[],[]},{{[],[],[],[[<<"usr_name#x.y.com/1140">>,{<<"usr_name">>,<<"x.y.com">>,<<"1140">>}]],[],[],[],[],[],[],[],[],[],[],[],[]}}},{dict,3,16,16,8,80,48,{[],[],[],[],[],[],[],[],[],[],[],[],[],[],[],[]},{{[],[],[],[],[],[],[],[[{<<"usr_name">>,<<"x.y.com">>,<<>>}|{owner,<<>>}]],[],[],[[{<<"miga8747b6">>,<<"x.y.com">>,<<>>}|{owner,<<>>}]],[],[],[],[[{<<"ruba32cc6e">>,<<"x.y.com">>,<<>>}|{owner,<<>>}]],[]}}},{lqueue,{{[],[]},0,unlimited},1000},[],<<>>,false,nil,none,undefined}
** Reason for termination =
** {bad_return_value,ok}
2018-07-30 05:12:12 =CRASH REPORT====
crasher:
initial call: mod_muc_room:init/1
pid: <0.9190.27>
registered_name: []
exception exit: {{bad_return_value,ok},[{p1_fsm,terminate,8,[{file,"src/p1_fsm.erl"},{line,760}]},{proc_lib,init_p_do_apply,3,[{file,"proc_lib.erl"},{line,247}]}]}
ancestors: ['mod_muc_x.y.com',ejabberd_gen_mod_sup,ejabberd_sup,<0.32330.26>]
messages: []
links: []
dictionary: [{'$internal_queue_len',0}]
trap_exit: true
status: running
heap_size: 6772
stack_size: 27
reductions: 3310
neighbours:
2018-07-30 12:41:56 =ERROR REPORT====

Answer 1

What ejabberd version? and how did you install it?
The syntax of your default_room_options are wrong, did you really use that config like that?
And what changes you made from a stock installation? I mean: did you setup a cluster of several nodes, did you enable other modules that may interfere with mod_muc...?
And most importantly: you have setup the max_rooms_discoitems to 10000. How many rooms does the service have? That option should be set to a small value, because requesting discoitems for 10.000 rooms means requesting information to each single room, and that means 10.000 queries, and that can have unknown consequences. Does your problem reproduce if you set a low value, like 100?