[Dovecot] Mailbox with .broken files

Michael Smith (DF) msmith at datafoundry.com
Thu Dec 19 22:49:12 EET 2013


Anyone have any feedback, guidance or suggestions on this?  Timo?



-----Original Message-----
From: Michael Smith (DF) [mailto:msmith at datafoundry.com]
Sent: Friday, December 13, 2013 9:49 AM
To: 'dovecot at dovecot.org'
Subject: [Dovecot] Mailbox with .broken files



We're using Dovecot 2.2.4 and mdbox storage with compression.



I noticed yesterday that at least one of the accounts has unusual files in it's mail/storage directory.  This account has approximately 17.5G of compressed mail, across about 750 storage files (m.###) using 8G of storage.



Starting on Dec 11, storage files m.409 through m.731 have not only their m.### file, but also a m.###.broken file.  At the same time .temp.<unix time>.<unique id>.<hostname> files also started showing up...

...

-rw--w---- 1 user123 mail     3225 Dec 12 04:38 m.708

-rw--w---- 1 user123 mail   167106 Dec 12 03:35 m.708.broken

-rw--w---- 1 user123 mail    46155 Dec 12 04:38 m.709

-rw--w---- 1 user123 mail   177267 Dec 12 03:40 m.709.broken

-rw--w---- 1 user123 mail 20965889 Nov 26 19:22 m.71

-rw--w---- 1 user123 mail   133248 Dec 12 04:38 m.710

-rw--w---- 1 user123 mail   264361 Dec 12 03:40 m.710.broken

-rw--w---- 1 user123 mail   103407 Dec 12 04:38 m.711

-rw--w---- 1 user123 mail   627736 Dec 12 03:40 m.711.broken

-rw--w---- 1 user123 mail     5132 Dec 12 04:38 m.712

-rw--w---- 1 user123 mail   136244 Dec 12 03:40 m.712.broken

-rw--w---- 1 user123 mail   187224 Dec 12 04:38 m.713

-rw--w---- 1 user123 mail   351104 Dec 12 03:45 m.713.broken

-rw--w---- 1 user123 mail   435793 Dec 12 04:38 m.714

-rw--w---- 1 user123 mail   566906 Dec 12 03:45 m.714.broken

-rw--w---- 1 user123 mail    60916 Dec 12 04:38 m.715

-rw--w---- 1 user123 mail   192028 Dec 12 03:50 m.715.broken

-rw--w---- 1 user123 mail    38051 Dec 12 04:38 m.716

-rw--w---- 1 user123 mail   169163 Dec 12 03:50 m.716.broken

-rw--w---- 1 user123 mail   226067 Dec 12 04:38 m.717

-rw--w---- 1 user123 mail   389948 Dec 12 04:00 m.717.broken

...

-rw--w---- 1 user123 mail 20967506 Dec  2 17:32 m.96

-rw--w---- 1 user123 mail 20967131 Dec  2 18:40 m.97

-rw--w---- 1 user123 mail 20969078 Dec  2 18:38 m.98

-rw--w---- 1 user123 mail 20963978 Dec  2 19:23 m.99

-rw--w---- 1 user123 mail   294968 Dec 11 20:05 .temp.1386813944.P9142Q0M123686.myhost

-rw--w---- 1 user123 mail   294968 Dec 11 20:05 .temp.1386813967.P9213Q0M387733.myhost

-rw--w---- 1 user123 mail   294968 Dec 11 20:05 .temp.1386813970.P9231Q0M371190.myhost

-rw--w---- 1 user123 mail   327736 Dec 11 20:05 .temp.1386813972.P9173Q0M932070.myhost

-rw--w---- 1 user123 mail   327736 Dec 11 20:05 .temp.1386813972.P9239Q0M114754.myhost

-rw--w---- 1 user123 mail   327736 Dec 11 20:05 .temp.1386813983.P9261Q0M640646.myhost

-rw--w---- 1 user123 mail  1048632 Dec 11 20:06 .temp.1386814038.P9515Q0M530600.myhost



I'm not really seeing anything that stands out in the maillog during this time.



What caused this problem?  How concerned should I be about possible lost email?  This is a production environment.



Below is the dovecot -n output.



--

Michael Smith







# dovecot -n

# 2.2.4: /etc/dovecot/dovecot.conf

# OS: Linux 2.6.32-279.19.1.el6.x86_64 x86_64 CentOS release 6.3 (Final)

auth_debug = yes

auth_debug_passwords = yes

auth_default_realm = mydomain.com

auth_master_user_separator = *

auth_mechanisms = plain login

auth_verbose = yes

auth_verbose_passwords = plain

disable_plaintext_auth = no

dotlock_use_excl = no

lda_mailbox_autocreate = yes

lock_method = dotlock

mail_access_groups = mail

mail_debug = yes

mail_fsync = always

mail_location = mdbox:~/mail:INDEX=~/index

mail_plugins = quota zlib

mail_privileged_group = mail

managesieve_notify_capability = mailto

managesieve_sieve_capability = fileinto reject envelope encoded-character vacation subaddress comparator-i;ascii-numeric relational regex imap4flags copy include variables body enotify environment mailbox date

mbox_read_locks = dotlock

mbox_write_locks = dotlock

mdbox_rotate_interval = 1 weeks

mdbox_rotate_size = 20 M

mmap_disable = yes

namespace {

  inbox = yes

  location =

  mailbox Drafts {

    auto = subscribe

    special_use = \Drafts

  }

  mailbox Junk {

    auto = subscribe

    special_use = \Junk

  }

  mailbox Sent {

    auto = subscribe

    special_use = \Sent

  }

  mailbox Trash {

    auto = subscribe

    special_use = \Trash

  }

  prefix =

  type = private

}

passdb {

  args = /etc/dovecot/dovecot-sql-master.conf.ext

  driver = sql

  master = yes

  pass = yes

}

passdb {

  args = /etc/dovecot/dovecot-sql.conf.ext

  driver = sql

}

plugin {

  autosubscribe = Trash

  autosubscribe2 = Junk

  autosubscribe3 = Drafts

  autosubscribe4 = Sent

  autosubscribe5 = INBOX

  mail_max_userip_connections = 10

  managesieve_max_line_length = 65536

  quota = dict:User quota::file:%h/dovecot.quota

  quota2_rule = Trash:storage=+10%%

  quota3_rule = Junk:storage=+20%%

  quota_rule = *:storage=100M:messages=100000

  recipient_delimiter = +

  sieve_before = /var/opt/mail/global.sieve/

  zlib_save = gz

  zlib_save_level = 9

}

pop3_reuse_xuidl = yes

protocols = imap pop3 sieve lmtp

service auth {

  inet_listener auth {

    port = 113

  }

  unix_listener auth-userdb {

    user = nobody

  }

}

service lmtp {

  inet_listener lmtp {

    port = 24

  }

  process_min_avail = 10

  service_count = 1

}

service managesieve-login {

  inet_listener sieve {

    port = 4190

  }

  process_min_avail = 0

  service_count = 1

  vsz_limit = 64 M

}

ssl = no

ssl_cert = </etc/pki/dovecot/certs/dovecot.pem

ssl_key = </etc/pki/dovecot/private/dovecot.pem

userdb {

  args = /etc/dovecot/dovecot-sql.conf.ext

  driver = sql

}

protocol lda {

  mail_plugins = quota zlib sieve

}

protocol imap {

  mail_plugins = quota zlib imap_quota

}

protocol sieve {

  mail_max_userip_connections = 10

  mail_plugins = quota zlib

  managesieve_max_line_length = 65536

  managesieve_notify_capability = mailto

  managesieve_sieve_capability = fileinto reject envelope encoded-character vacation subaddress comparator-i;ascii-numeric relational regex imap4flags copy include variables body enotify environment mailbox date

}

protocol lmtp {

  mail_plugins = quota zlib sieve

}



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