Hello List,
i have a problem with index-files which is separated in 2 subproblems. May be these problems are connected. Currently we use Ubuntu 18.04 LTS which is bundled with dovecot 2.2.33.2 These servers are fresh installed machines and users are added to the system after, there was no upgrade. Sometimes it happens, that dovecot stops showing new mail. There is no error in log, dovecot just seems to do his normal operations but is not delivering new emails from /var/mail/myuser emails are delivered again if i delete index-files from .imap folder. So index is recreated and everything works again. I cant reproduce this problem, but every 2 days i have one user who is reporting this problem.
Second problem is similiar. I Upgraded a server from Ubuntu 16.04 to Ubuntu 18.04. This includes an upgrade from dovecot 2.2.22 to 2.2.33.2. After that i installed an self packaged dovecot 2.2.36.1 Now here is same problem, dovecot is not showing new mails, but the difference is we have a Raw backtrace in Log just as expected:
Feb 8 08:45:37 hostname dovecot[14882]: imap(myuser): Error: Raw backtrace: /usr/lib/dovecot/libdovecot.so.0(+0xa1ee2) [0x7f78b3b2cee2] -> /usr/lib/dovecot/libdovecot.so.0(+0xa1fda) [0x7f78b3b2cfda] -> /usr/lib/dovecot/libdovecot.so.0(i_fatal+0) [0x7f78b3abb8a8] -> /usr/lib/dovecot/libdovecot-storage.so.0(index_mail_parse_header+0x78a) [0x7f78b3e7940a] -> /usr/lib/dovecot/libdovecot.so.0(+0x83592) [0x7f78b3b0e592] -> /usr/lib/dovecot/libdovecot.so.0(i_stream_read+0x74) [0x7f78b3b38814] -> /usr/lib/dovecot/libdovecot.so.0(i_stream_read_data+0x3d) [0x7f78b3b392fd] -> /usr/lib/dovecot/libdovecot-storage.so.0(index_mail_get_header_stream+0x4a) [0x7f78b3e7a2ea] -> /usr/lib/dovecot/libdovecot-storage.so.0(mail_get_header_stream+0x4a) [0x7f78b3dfd8da] -> /usr/lib/dovecot/libdovecot-storage.so.0(imap_msgpart_open+0x24a) [0x7f78b3ebb57a] -> dovecot/imap myuser ip.ip.ip.ip FETCH [0x5581ac76d81c] -> dovecot/imap m038422 ip.ip.ip.ip FETCH [0x5581ac76ba54] -> dovecot/imap myuser ip.ip.ip.ip FETCH [0x5581ac76cd69] -> dovecot/imap myuser ip.ip.ip.ip FETCH [0x5581ac75e1bb] -> dovecot/imap myuser ip.ip.ip.ip FETCH [0x5581ac76a09c] -> dovecot/imap myuser ip.ip.ip.ip FETCH [0x5581ac768612] -> dovecot/imap myuser ip.ip.ip.ip FETCH [0x5581ac7686ac] -> dovecot/imap myuser ip.ip.ip.ip FETCH [0x5581ac768a6d] -> dovecot/imap myuser ip.ip.ip.ip FETCH [0x5581ac768fbc] -> /usr/lib/dovecot/libdovecot.so.0(io_loop_call_io+0x52) [0x7f78b3b43482] -> /usr/lib/dovecot/libdovecot.so.0(io_loop_handler_run_internal+0x12e) [0x7f78b3b44b9e] -> /usr/lib/dovecot/libdovecot.so.0(io_loop_handler_run+0x36) [0x7f78b3b43516] -> /usr/lib/dovecot/libdovecot.so.0(io_loop_run+0x38) [0x7f78b3b436c8] -> /usr/lib/dovecot/libdovecot.so.0(master_service_run+0x13) [0x7f78b3ac6aa3] -> dovecot/imap myuser ip.ip.ip.ip FETCH [0x5581ac75b159] -> /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xe7) [0x7f78b36bbb97] -> dovecot/imap myuser ip.ip.ip.ip FETCH [0x5581ac75b2fa] Feb 8 08:45:37 hostname dovecot[14882]: imap(myuser): Fatal: master: service(imap): child 14135 killed with signal 6 (core dumped)
Over all dovecot and OS versions we use same old-fashioned setup. Mails are delivered by procmail to classic mbox file. This is output of doveconf -n
# 2.2.36.1 (5d621cf65): /etc/dovecot/dovecot.conf # Pigeonhole version 0.4.21 (92477967) # OS: Linux 4.18.0-14-generic x86_64 Ubuntu 18.04.1 LTS # Hostname: myhostname auth_mechanisms = plain login auth_username_chars = abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ01234567890.-_@üÜöÖäÄ auth_worker_max_count = 60 disable_plaintext_auth = no imap_capability = +XLIST lock_method = flock login_greeting = mailserver ready. login_log_format_elements = user=<%u> method=%m rip=%r lip=%l %c mail_cache_min_mail_count = 30 mail_location = mbox:~/mail:INBOX=/var/mail/%u mail_max_userip_connections = 30 mbox_read_locks = dotlock mbox_very_dirty_syncs = yes namespace inbox { inbox = yes location = mailbox Archiv { auto = no special_use = } mailbox Drafts { auto = no special_use = } mailbox Junk { auto = no special_use = } mailbox Sent { auto = no special_use = } mailbox Trash { auto = no special_use = } prefix = } passdb { args = /etc/dovecot/dovecot-sql.conf driver = sql } protocols = imap pop3 service auth-worker { idle_kill = 1 mins } service auth { idle_kill = 1 mins unix_listener /var/spool/postfix/private/auth { group = postfix mode = 0660 user = postfix } user = root } service imap-login { executable = /usr/lib/dovecot/imap-login process_min_avail = 4 service_count = 0 user = dovecot } service imap { process_limit = 1024 } service pop3-login { executable = /usr/lib/dovecot/pop3-login process_min_avail = 4 service_count = 0 user = dovecot } service pop3 { executable = /usr/lib/dovecot/pop3 process_limit = 1024 } shutdown_clients = no ssl_ca = </path/cert.pem ssl_cert = </path/cert.pem ssl_cipher_list = ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-AES256-GCM-SHA384:DHE-RSA-AES128-GCM-SHA256:DHE-DSS-AES128-GCM-SHA256:kEDH+AESGCM:ECDHE-RSA-AES128-SHA256:ECDHE-ECDSA-AES128-SHA256:ECDHE-RSA-AES128-SHA:ECDHE-ECDSA-AES128-SHA:ECDHE-RSA-AES256-SHA384:ECDHE-ECDSA-AES256-SHA384:ECDHE-RSA-AES256-SHA:ECDHE-ECDSA-AES256-SHA:DHE-RSA-AES128-SHA256:DHE-RSA-AES128-SHA:DHE-DSS-AES128-SHA256:DHE-RSA-AES256-SHA256:DHE-DSS-AES256-SHA:DHE-RSA-AES256-SHA:AES128-GCM-SHA256:AES256-GCM-SHA384:AES128-SHA256:AES256-SHA256:AES128-SHA:AES256-SHA:AES:CAMELLIA:!DES-CBC3-SHA:!aNULL:!eNULL:!EXPORT:!DES:!RC4:!MD5:!PSK:!aECDH:!EDH-DSS-DES-CBC3-SHA:!EDH-RSA-DES-CBC3-SHA:!KRB5-DES-CBC3-SHA ssl_dh_parameters_length = 2048 ssl_key = # hidden, use -P to show it ssl_prefer_server_ciphers = yes userdb { args = /etc/dovecot/dovecot-sql.conf driver = sql } verbose_proctitle = yes protocol imap { imap_client_workarounds = delay-newmail mail_plugins = mail_log notify ssl = yes } protocol pop3 { pop3_client_workarounds = oe-ns-eoh outlook-no-nuls pop3_no_flag_updates = no pop3_uidl_format = %08Xu%08Xv ssl = yes }
Whats going wrong here? Main problem is first one. dovecot stops showing new mail during service without telling a reason. reason looks like a broken index file. What to do here? Please tell me your opinion.
Thanks, Hajo