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](+0x26e97)

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

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

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

[0x564e1e215133]
 dovecot/imap [someuser2@ourdom 2001:1234::fb8 UID SORT](client_handle_input+0x1ad) [0x564e1e21532d]  dovecot/imap [someuser2@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@ourdom 192.168.166.58 UID SEARCH](+0x26e97) [0x563bbf06de97]  dovecot/imap [someuser@ourdom 192.168.166.58 UID SEARCH](command_exec+0x64) [0x563bbf066d74]  dovecot/imap [someuser@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@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: helpd...@net.ipl.pt / https://www.net.ipl.pt
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=


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