Anope sometime disconnect without apparent cause

[crazycatdevs]

Hi there,
I already talked about that previously, but I can't understand what happen.

Anope (2.0.16) sometime disconnects from UnrealIrcd (6.1.9.1), it also happened with previous versions of UnrealIrcd.
The link is on 127.0.0.1 and nothing particular happens when it disconnect, neither on the network itself (small audience, and often there are no activity) neither in anope (debug log doesn't show anything, anope doesn't see it's disconnected).

I can have anope online for days, or weeks, and I can have it disconnecting every day or several times a day, without any changement on the server.

The server is debian 12 and only have unrealircd, anope, nginx and a few eggdrops. I use MariaDB for the websites and anope, but it's hosted on another server.

Any suggestion ?

[sadiepowell]

What database backend are you using and are you using irc2sql or chanstats?

[crazycatdevs]

Anope modules (related to mariadb/mysql): db_sql, m_mysql, m_sql_authentication, m_chanstats and irc2sql

The mariadb server is hosted on debian 12. Previously it was on the same server than the services but I migrated it because of this trouble, thinking it was peharps because my server has few RAM. But it didin't change anything.

And looking the services.log (with or without debug enabled), there is no particular event in the previous seconds or minutes which can explain the disconnexion.

[sadiepowell]

Is it possible for you to temporarily unload chanstats and irc2sql to see if it makes a difference?

[crazycatdevs]

I'll try, I've to adapt the site of the network to temporaly not use the datas from anope before (or just inform that the datas are temporaly wrong).

[crazycatdevs]

I'd stopped m_chanstats and irc2sql.
Bad luck, the last deconnection was 3h before (9AM UTC+2). I think I can kept these modules unloaded for 1 week max.

Here is the log of the "fatal moment":

[Aug 25 20:57:19.280768 2025] Received: PING :avalon.zeolia.chat
[Aug 25 20:57:19.281167 2025] Sent: :00B PONG 00B avalon.zeolia.chat
[Aug 25 20:57:20.475594 2025] Received: @unrealircd.org/geoip=FR;unrealircd.org/userhost=robot@source.zeolia.chat;unrealircd.org/userip=robot@xx.xx.xx.xx;draft/bot;bot;account=Qi;msgid=cRJeETrpC8IEM5PBQWIcLH;time=2025-08-25T18:57:20.474Z>
[Aug 25 20:57:30.486821 2025] bs_main: Running bandata purger
[Aug 25 20:57:30.488713 2025] Saving databases
[Aug 25 21:00:19.323554 2025] Received Terminated signal (15), exiting.
[Aug 25 21:00:19.323850 2025] Saving databases
[Aug 25 21:00:19.446594 2025] Services terminating via signal Terminated (15)

From unrealircd:

20:59:04  zeolia -- avalon.zeolia.chat: link.LINK_UNRELIABLE [warn] Warning, no response from services.zeolia.chat for 15 seconds
21:00:19  zeolia -- avalon.zeolia.chat: link.LINK_DISCONNECTED [error] Lost server link to services.zeolia.chat [127.0.0.1]: No response (Ping timeout)

I've an eggdrop which automaticaly stops services when the LINK_DISCONNECTED notice is received (explaining the Received Terminated signal (15), exiting in log), and they are restarted via the cron.

[crazycatdevs]

No disconnection of the services since I unloaded the modules.
irc2sql is now reloaded, wait & see

[crazycatdevs]

irc2sql enabled on 2025-08-30 15:34 (with restart of anope), the trouble occured this morning (2025-09-01 07:54).

Here is the log:

[Sep 01 07:53:57 2025] bs_main: Running bandata purger
[Sep 01 07:53:57 2025] Saving databases
[Sep 01 07:54:55 2025] Received Terminated signal (15), exiting.
[Sep 01 07:54:55 2025] Saving databases
[Sep 01 07:54:55 2025] Services terminating via signal Terminated (15)
[Sep 01 07:54:55 2025] Sent: :00BAAAAAE QUIT :Shutting down
[Sep 01 07:54:55 2025] Sent: :00BAAAAAQ QUIT :Shutting down
[Sep 01 07:54:55 2025] Sent: :00BAAAAAS QUIT :Shutting down
[Sep 01 07:54:55 2025] Sent: :00BAAAAAT QUIT :Shutting down
[Sep 01 07:54:55 2025] Sent: :00BAAAAAI QUIT :Shutting down
[Sep 01 07:54:55 2025] Sent: :00BAAAAAU QUIT :Shutting down
[Sep 01 07:54:55 2025] Sent: :00BAAAAAG QUIT :Shutting down
[Sep 01 07:54:55 2025] Sent: :00BAAAAAC QUIT :Shutting down
[Sep 01 07:54:55 2025] Sent: :00BAAAAAH QUIT :Shutting down
[Sep 01 07:54:55 2025] Sent: :00BAAAAAJ QUIT :Shutting down
[Sep 01 07:54:55 2025] Sent: :00BAAAAAN QUIT :Shutting down
[Sep 01 07:54:55 2025] Sent: :00BAAAAAP QUIT :Shutting down
[Sep 01 07:54:55 2025] Sent: :00BAAAAAF QUIT :Shutting down
[Sep 01 07:54:55 2025] Sent: :00BAAAAAO QUIT :Shutting down
[Sep 01 07:54:55 2025] Sent: :00BAAAAAM QUIT :Shutting down
[Sep 01 07:54:55 2025] Sent: :00BAAAAAB QUIT :Shutting down
[Sep 01 07:54:55 2025] Sent: :00BAAAAAL QUIT :Shutting down
[Sep 01 07:54:55 2025] Sent: :00BAAAAAR QUIT :Shutting down
[Sep 01 07:54:55 2025] Sent: :00BAAAAAD QUIT :Shutting down
[Sep 01 07:54:55 2025] Sent: :00BAAAAAK QUIT :Shutting down
[Sep 01 07:54:55 2025] Sent: :00B SQUIT 00B :Services terminating via signal Terminated (15)

I now unload irc2sql and load m_chanstats

[crazycatdevs]

Well, crossed fingers: I'd restarted anope after having done #526 and actually no disconnection from anope.
I can't understand the relation between the OnChannelCreate procedure and the disconnection, I didn't find if anope regularly tries to refill the database...
And peharps anope will disconnect soon...
Anope (2.0.16) did the same again. Now running in 2.0.18. irc2sql seems to be the culprit, but I can't understand why.

[crazycatdevs]

2.0.18 does the same. Log doesn't contain anything particular, I see a normal activity in the channel at 11:25:42 (a message in a channel), and nothing until 11:27:58 when unrealircd send the notice about loosing services.

I think I'll use unrealircd json-rpc to get realtime channels and users, I can't have my services randomly restarted because of no response.

[crazycatdevs]

Ok, so

• irc2sql is no more used
• last server event before loosing connection: a client disconnection @ 12:57:46
• last services.log entry @ 13:00:28
• nothing happens on the server (noone connects nor quit, no part/join, just a gzline added @ 13:00:30

I receive

[Mon Sep 22 13:00:56 2025] avalon.zeolia.chat link.LINK_UNRELIABLE warn: Warning, no response from services.zeolia.chat for 15 seconds
[Mon Sep 22 13:02:11 2025] avalon.zeolia.chat link.LINK_DISCONNECTED error: Lost server link to services.zeolia.chat [127.0.0.1]: No response (Ping timeout)

So, the trouble is somewhere else, but I can't figure where. The services were running since sept, 18th 02:19:00

[crazycatdevs]

Hello,
I'd migrate my services to a more powerfull server (more CPU, more RAM) thinking it was peharps a trouble with resources... But no, exactly the same trouble this morning.
Anope seems to stop receiving messages from servers, so it doesn't answer to PING (as it doesn't see the message) so the server disconnects it. And Anope doesn't know it's disconnected...