=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= Pedro Ribeiro Politécnico de Lisboa, Serviços da Presidência Departamento de Sistemas de Informação e Comunicações Phone: +351 210 464 700 (general) / VoIP: 80100 Helpdesk: helpdesk@net.ipl.pt / https://www.net.ipl.pt

On 25/03/2021 05:30 Pedro Ribeiro <pribeiro@net.ipl.pt> wrote:

Hello,

I'm seeing a few backtraces like this ones in our daily log file.

It always seem to happen during UID SEARCH or UID SORT

I've already increased some process memory limits in the past and I'm currently using:

default_vsz_limit = 512 M

Is this some bug or I just need to increase this memory limit or some specific of a process?

Using Dovecot 2.3.13 on Gentoo Linux amd64

Build options: ioloop=epoll notify=inotify openssl io_block_size=8192 SQL drivers: mysql Passdb: checkpassword passwd passwd-file shadow sql Userdb: checkpassword passwd prefetch passwd-file sql

...

 Error: Raw backtrace: /usr/lib64/dovecot/libdovecot.so.0(backtrace_append+0x3d) [0x7efd24b8c04d] /usr/lib64/dovecot/libdovecot.so.0(backtrace_get+0x1e) [0x7efd24b8c15e] /usr/lib64/dovecot/libdovecot.so.0(+0xf4fcb) [0x7efd24b97fcb] /usr/lib64/dovecot/libdovecot.so.0(+0xf5061) [0x7efd24b98061] /usr/lib64/dovecot/libdovecot.so.0(+0x4e25b) [0x7efd24af125b] /usr/lib64/dovecot/libdovecot.so.0(+0x4fcf1) [0x7efd24af2cf1] /usr/lib64/dovecot/libdovecot.so.0(i_stream_read+0x2a) [0x7efd24ba3e3a] /usr/lib64/dovecot/libdovecot.so.0(i_stream_read_data+0x3d) [0x7efd24ba477d] /usr/lib64/dovecot/libdovecot.so.0(message_parse_header_next+0x69) [0x7efd24b766b9] /usr/lib64/dovecot/libdovecot.so.0(+0xd613a) [0x7efd24b7913a] /usr/lib64/dovecot/libdovecot.so.0(+0xd62bf) [0x7efd24b792bf] /usr/lib64/dovecot/libdovecot.so.0(message_parser_parse_next_block+0x44) [0x7efd24b78894] /usr/lib64/dovecot/libdovecot.so.0(message_search_msg+0xa0) [0x7efd24b7acd0] /usr/lib64/dovecot/libdovecot-storage.so.0(+0xcec2e) [0x7efd24f2ec2e] /usr/lib64/dovecot/libdovecot-storage.so.0(+0x517c9) [0x7efd24eb17c9] /usr/lib64/dovecot/libdovecot-storage.so.0(mail_search_args_foreach+0x45) [0x7efd24eb27f5] /usr/lib64/dovecot/libdovecot-storage.so.0(+0xcf96b) [0x7efd24f2f96b] /usr/lib64/dovecot/libdovecot-storage.so.0(+0xd0d29) [0x7efd24f30d29] /usr/lib64/dovecot/libdovecot-storage.so.0(index_storage_search_next_nonblock+0x61) [0x7efd24f313b1] /usr/lib64/dovecot/libdovecot-storage.so.0(mailbox_search_next_nonblock+0x20) [0x7efd24ebc240] dovecot/imap someuser2@ourdom 2001:1234::fb8 UID SORT

...

[0x564e1e21de97] dovecot/imap someuser2@ourdom 2001:1234::fb8 UID SORT [0x564e1e21e70c] dovecot/imap someuser2@ourdom 2001:1234::fb8 UID SORT [0x564e1e21058b] dovecot/imap someuser2@ourdom 2001:1234::fb8 UID SORT [0x564e1e216d74] dovecot/imap someuser2@ourdom 2001:1234::fb8 UID SORT

...

[0x564e1e214eaf] dovecot/imap someuser2@ourdom 2001:1234::fb8 UID SORT

...

[0x564e1e214f62] dovecot/imap someuser2@ourdom 2001:1234::fb8 UID SORT

...

[0x564e1e215133] dovecot/imap someuser2@ourdom 2001:1234::fb8 UID SORT [0x564e1e21532d] dovecot/imap someuser2@ourdom 2001:1234::fb8 UID SORT [0x564e1e2157e2] /usr/lib64/dovecot/libdovecot.so.0(io_loop_call_io+0x69) [0x7efd24bad989]

...

Error: Raw backtrace: /usr/lib64/dovecot/libdovecot.so.0(backtrace_append+0x3d) [0x7f3c6b7b104d] /usr/lib64/dovecot/libdovecot.so.0(backtrace_get+0x1e) [0x7f3c6b7b115e] /usr/lib64/dovecot/libdovecot.so.0(+0xf4fcb) [0x7f3c6b7bcfcb] /usr/lib64/dovecot/libdovecot.so.0(+0xf5061) [0x7f3c6b7bd061] /usr/lib64/dovecot/libdovecot.so.0(+0x4e25b) [0x7f3c6b71625b] /usr/lib64/dovecot/libdovecot.so.0(+0x4fcf1) [0x7f3c6b717cf1] /usr/lib64/dovecot/libdovecot.so.0(i_stream_read+0x2a) [0x7f3c6b7c8e3a] /usr/lib64/dovecot/libdovecot.so.0(i_stream_read_data+0x3d) [0x7f3c6b7c977d] /usr/lib64/dovecot/libdovecot.so.0(message_parse_header_next+0x69) [0x7f3c6b79b6b9] /usr/lib64/dovecot/libdovecot.so.0(+0xd613a) [0x7f3c6b79e13a] /usr/lib64/dovecot/libdovecot.so.0(+0xd62bf) [0x7f3c6b79e2bf] /usr/lib64/dovecot/libdovecot.so.0(message_parser_parse_next_block+0x44) [0x7f3c6b79d894] /usr/lib64/dovecot/libdovecot.so.0(message_search_msg+0xa0) [0x7f3c6b79fcd0] /usr/lib64/dovecot/libdovecot-storage.so.0(+0xcec2e) [0x7f3c6bb53c2e] /usr/lib64/dovecot/libdovecot-storage.so.0(+0x517c9) [0x7f3c6bad67c9] /usr/lib64/dovecot/libdovecot-storage.so.0(mail_search_args_foreach+0x45) [0x7f3c6bad77f5] /usr/lib64/dovecot/libdovecot-storage.so.0(+0xcf96b) [0x7f3c6bb5496b] /usr/lib64/dovecot/libdovecot-storage.so.0(+0xd0d29) [0x7f3c6bb55d29] /usr/lib64/dovecot/libdovecot-storage.so.0(index_storage_search_next_nonblock+0x10d) [0x7f3c6bb5645d] /usr/lib64/dovecot/libdovecot-storage.so.0(mailbox_search_next_nonblock+0x20) [0x7f3c6bae1240] dovecot/imap someuser@ourdom 192.168.166.58 UID SEARCH [0x563bbf06de97] dovecot/imap someuser@ourdom 192.168.166.58 UID SEARCH [0x563bbf066d74] dovecot/imap someuser@ourdom 192.168.166.58 UID SEARCH [0x563bbf06d5e2] /usr/lib64/dovecot/libdovecot.so.0(io_loop_handle_timeouts+0x123)

...

[0x7f3c6b7d27b3] /usr/lib64/dovecot/libdovecot.so.0(io_loop_handler_run_internal+0xc7) [0x7f3c6b7d3ed7] /usr/lib64/dovecot/libdovecot.so.0(io_loop_handler_run+0x50) [0x7f3c6b7d2a30] /usr/lib64/dovecot/libdovecot.so.0(io_loop_run+0x40) [0x7f3c6b7d2ba0] /usr/lib64/dovecot/libdovecot.so.0(master_service_run+0x13) [0x7f3c6b74a393] dovecot/imap someuser@ourdom 192.168.166.58 UID SEARCH [0x563bbf0571a9] /lib64/libc.so.6(__libc_start_main+0xeb) [0x7f3c6b33182b] regards!

-- Best regards,

Can you check your logs for more information? Also, can you provide doveconf -n and try to get backtrace with gdb? https://www.dovecot.org/bugreport-mail see the section about core dumps, use that but instead sending us the core, open it using

gdb /usr/lib/dovecot/imap /path/to/core bt full

Aki