Backtrace on UID SORT and UID SEARCH

[Pedro Ribeiro]

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 at ourdom 2001:1234::fb8 UID SORT](+0x26e97) 

> [0x564e1e21de97]
>  dovecot/imap [someuser2 at ourdom 2001:1234::fb8 UID 
> SORT](imap_search_start+0xdc) [0x564e1e21e70c]
>  dovecot/imap [someuser2 at ourdom 2001:1234::fb8 UID 
> SORT](cmd_sort+0x24b) [0x564e1e21058b]
>  dovecot/imap [someuser2 at ourdom 2001:1234::fb8 UID 
> SORT](command_exec+0x64) [0x564e1e216d74]
>  dovecot/imap [someuser2 at ourdom 2001:1234::fb8 UID SORT](+0x1deaf) 

> [0x564e1e214eaf]
>  dovecot/imap [someuser2 at ourdom 2001:1234::fb8 UID SORT](+0x1df62) 

> [0x564e1e214f62]
>  dovecot/imap [someuser2 at ourdom 2001:1234::fb8 UID SORT](+0x1e133) 

> [0x564e1e215133]
>  dovecot/imap [someuser2 at ourdom 2001:1234::fb8 UID 
> SORT](client_handle_input+0x1ad) [0x564e1e21532d]
>  dovecot/imap [someuser2 at ourdom 2001:1234::fb8 UID 
> SORT](client_input+0x72) [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 at ourdom 192.168.166.58 UID SEARCH](+0x26e97) 
> [0x563bbf06de97]
>  dovecot/imap [someuser at ourdom 192.168.166.58 UID 
> SEARCH](command_exec+0x64) [0x563bbf066d74]
>  dovecot/imap [someuser at ourdom 192.168.166.58 UID SEARCH](+0x265e2) 
> [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 at ourdom 192.168.166.58 UID SEARCH](main+0x459) 
> [0x563bbf0571a9]
>  /lib64/libc.so.6(__libc_start_main+0xeb) [0x7f3c6b33182b]
regards!

-- 
Best regards,

=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
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 at net.ipl.pt / https://www.net.ipl.pt
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=


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