Hello Aki,

Arch Linux doesn't have install-able debug symbols for Dovecot. That's why I just compiled the package for myself with enabled debug symbols (by editing the makepkg.conf).

I've attached the output from gdb's bt full.

- Marcel

You need to install debug symbols. Not sure how this is done in arch linux though.

Aki

On 03 February 2019 at 15:02 Marcel Menzel < mail@mcl.gg> wrote:

Hello John,

I tried (until now) to get a valuable backtrace, but it seems that GDB

can't resolve all symbols.

This is what systemd-coredump is giving me:

Stack trace of thread 22359:

#0  0x0000638167eaf062 event_unref (libdovecot.so.0)

#1  0x000004a58a212151 n/a (dict)

#2  0x000004a58a211333 n/a (dict)

#3  0x000004a58a20514d n/a (dict)

#4  0x0000638167e556f2 dict_transaction_begin (libdovecot.so.0)

#5  0x000004a58a203b06 n/a (dict)

#6  0x000004a58a2045ff dict_command_input (dict)

#7  0x000004a58a202a31 n/a (dict)

#8  0x000004a58a202b35 n/a (dict)

#9  0x0000638167eaacfd io_loop_call_io (libdovecot.so.0)

#10 0x0000638167eac635 io_loop_handler_run_internal (libdovecot.so.0)

#11 0x0000638167eaadc7 io_loop_handler_run (libdovecot.so.0)

#12 0x0000638167eaaf68 io_loop_run (libdovecot.so.0)

#13 0x0000638167e1b36a master_service_run (libdovecot.so.0)

#14 0x000004a58a202300 main (dict)

#15 0x0000638167a17223 __libc_start_main (libc.so.6)

#16 0x000004a58a2023fe _start (dict)

GDB's "bt full" won't give anything more here, I might compile Dovecot

with debug symbols enabled as soon as I have a little more time:

(gdb) bt full

#0  0x0000638167eaf062 in event_unref () from

/usr/lib/dovecot/libdovecot.so.0

No symbol table info available.

#1  0x000004a58a212151 in ?? ()

No symbol table info available.

#2  0x000004a58a211333 in ?? ()

No symbol table info available.

#3  0x000004a58a20514d in ?? ()

No symbol table info available.

#4  0x0000638167e556f2 in dict_transaction_begin () from

/usr/lib/dovecot/libdovecot.so.0

No symbol table info available.

#5  0x000004a58a203b06 in ?? ()

No symbol table info available.

#6  0x000004a58a2045ff in dict_command_input ()

No symbol table info available.

#7  0x000004a58a202a31 in ?? ()

No symbol table info available.

#8  0x000004a58a202b35 in ?? ()

No symbol table info available.

#9  0x0000638167eaacfd in io_loop_call_io () from

/usr/lib/dovecot/libdovecot.so.0

No symbol table info available.

#10 0x0000638167eac635 in io_loop_handler_run_internal () from

/usr/lib/dovecot/libdovecot.so.0

No symbol table info available.

#11 0x0000638167eaadc7 in io_loop_handler_run () from

/usr/lib/dovecot/libdovecot.so.0

No symbol table info available.

#12 0x0000638167eaaf68 in io_loop_run () from

/usr/lib/dovecot/libdovecot.so.0

No symbol table info available.

#13 0x0000638167e1b36a in master_service_run () from

/usr/lib/dovecot/libdovecot.so.0

No symbol table info available.

#14 0x000004a58a202300 in main ()

No symbol table info available.

- Marcel

Am 03.02.2019 um 09:08 schrieb John Fawcett:

On 01/02/2019 20:40, Marcel Menzel wrote:

Hello,

>>

>> After I configured a SQLite backed dict quota backend, the dict process

>> crashes every time a quota operation is happening.

>>

>> SQLite: 3.26.0

>>

>> Dovecot: 2.3.4 (0ecbaf23d)

>>

>> Linux: 4.20.4.a-1-hardened #1 SMP PREEMPT Fri Jan 25 01:24:51 CET 2019

>> x86_64 GNU/Linux (Arch Linux)

>>

>> Filesystem: BTRFS

>>

>>

>> I can't get any debug output from Dovecot, even after setting log_debug

>> = cat:* event:* source:* field:*=*

>>

>> dovecot[6457]: dict(6687): Debug: sqlite: Finished query 'BEGIN

>> TRANSACTION' in 0 msecs

>> dovecot[6457]: dict(6687): Fatal: master: service(dict): child 6687

>> killed with signal 11 (core dumped)

>>

>>

>> I've attached the output of dovecot -n and the coredump file from

>> systemd-coredump.

>>

>>

>> Kind regards,

>>

>> Marcel Menzel

>>

Any chance of posting a backtrace?

John

---
Aki Tuomi