Error: Connection to IMAP server failed: b'* BYE Auth process broken'

[VladislavGatsenko]

Impacted versions

• Distribution: Debian 12
• Arch: 64 Bits
• Database: PostgreSQL / MySQL
• Modoboa: 2.3.1

Steps to reproduce

clean install with let encrypt certs

Webmail module Error:
Error: Connection to IMAP server failed: b'* BYE Auth process broken'

I tried under different accounts - the result is the same

[abond21-bond]

same problem

[tonioo]

Do you see anything useful in logs?

[abond21-bond]

Do you see anything useful in logs?

nope, nothing

[tonioo]

Could you try to increase logging level in dovecot?

[abond21-bond]

tail -f /var/log/dovecot.log
Sep 06 08:36:16 auth: Panic: file http-client.c: line 646 (http_client_context_close): assertion failed: (cctx->clients_list == NULL)
Sep 06 08:36:16 auth: Error: Raw backtrace: #0 t_askpass[0x7f7207389be0] -> #1 backtrace_append[0x7f7207389e50] -> #2 backtrace_get[0x7f7207389fe0] -> #3 execvp_const[0x7f72073951d0] -> #4 i_syslog_fatal_handler[0x7f7207395b40] -> #5 i_panic[0x7f72072eb0d4] -> #6 [unw_get_proc_name() failed: -10] -> #7 io_loop_set_current[0x7f72073abc00] -> #8 [unw_get_proc_name() failed: -10] -> #9 [unw_get_proc_name() failed: -10] -> #10 io_loop_call_io[0x7f72073aceb0] -> #11 io_loop_handler_run_internal[0x7f72073aebb0] -> #12 io_loop_handler_run[0x7f72073aed40] -> #13 io_loop_run[0x7f72073aef10] -> #14 [unw_get_proc_name() failed: -10] -> #15 [unw_get_proc_name() failed: -10] -> #16 passdb_cache_deinit[0x55fdd624b190] -> #17 auths_init[0x55fdd622d300] -> #18 main[0x55fdd622b920] -> #19 __libc_init_first[0x7f720702c1d0] -> #20 __libc_start_main[0x7f720702c280] -> #21 _start[0x55fdd622bea0]
Sep 06 08:36:16 master: Error: service(auth): command startup failed, throttling for 2.000 secs
Sep 06 08:36:16 auth: Fatal: master: service(auth): child 4711 killed with signal 6 (core dumps disabled - https://dovecot.org/bugreport.html#coredumps)

[abond21-bond]

it't clean VPS from Hetzner. Tried fresh install several times

[abond21-bond]

tail -f /var/log/dovecot-info.log
Sep 06 08:34:52 master: Info: Dovecot v2.3.19.1 (9b53102964) starting up for imap, lmtp, sieve (core dumps disabled)
Sep 06 08:36:16 imap-login: Info: Disconnected: Auth process broken (disconnected before auth was ready, waited 0 secs): user=<>, rip=127.0.0.1, lip=127.0.0.1, secured, session=<RYn1TG8hWpZ/AAAB>

[tonioo]

Could you try with dovecot version coming from testing? (using backports)

[abond21-bond]

It worked!!!

sudo nano /etc/apt/sources.list

add this line:
deb http://deb.debian.org/debian bookworm-backports main

sudo apt update

apt-cache policy dovecot-core

dovecot-core:
Installed: 1:2.3.19.1+dfsg1-2.1+deb12u1
Candidate: 1:2.3.19.1+dfsg1-2.1+deb12u1
Version table:
1:2.3.21.1+dfsg1-1~bpo12+1 100
100 http://deb.debian.org/debian bookworm-backports/main amd64 Packages
*** 1:2.3.19.1+dfsg1-2.1+deb12u1 500
500 http://deb.debian.org/debian bookworm/main amd64 Packages
500 http://security.debian.org/debian-security bookworm-security/main amd64 Packages

sudo apt install -t bookworm-backports dovecot-core dovecot-imapd dovecot-pop3d

[tonioo]

Great. Now we need to update the installer...