[Dovecot] POP3: Message ordering changed unexpectedly

4 Feb 2014


      Hi,
I think I'm having a problem with simultaneous pop3 connections on the
same mailbox with one connection deleting a message.
Jan 29 14:36:30 imap1 dovecot: pop3-login: Login:
user=<riki@domain.com>, method=PLAIN, rip=82.xx.xx.xx, lip=-----,
pip=------, mpid=7703, secured, session=<1A+8DiHxfABSUCCH>
Jan 29 14:36:30 imap1 dovecot: pop3-login: Login:
user=<riki@domain.com>, method=PLAIN, rip=69.xx.xx.xx, lip=-----,
pip=------, mpid=7709, secured, session=<7iLADiHx7wBFdoaw>
Jan 29 14:36:30 imap1 dovecot: pop3(riki@domain.com): Disconnected:
Logged out top=0/0, retr=0/0, del=1/1227, size=51548362
Jan 29 14:36:33 imap1 dovecot: pop3(riki@domain.com): Error: Message
ordering changed unexpectedly (msg #1: storage seq 1 -> 2)
Jan 29 14:36:33 imap1 dovecot: pop3(riki@domain.com): Disconnected: POP3
UIDLs couldn't be listed top=3/2662, retr=0/0, del=0/1227, size=51548362
and again:
Feb  3 12:43:16 imap1 dovecot: pop3-login: Login:
user=<riki@domain.com>, method=PLAIN, rip=82.xx.xx.xx, lip=-------,
pip=-------, mpid=31095, secured, session=<ae74DoTxtABSUCCU>
Feb  3 12:43:17 imap1 dovecot: pop3-login: Login:
user=<riki@domain.com>, method=PLAIN, rip=69.xx.xx.xx, lip=-------,
pip=-------, mpid=31119, secured, session=<GvQMD4TxrwBFdoaw>
Feb  3 12:43:17 imap1 dovecot: pop3(riki@domain.com): Disconnected:
Logged out top=0/0, retr=1/80835, del=2/1192, size=48287015
Feb  3 12:43:18 imap1 dovecot: pop3(riki@domain.com): Error: Message
ordering changed unexpectedly (msg #1: storage seq 1 -> 3)
Feb  3 12:43:18 imap1 dovecot: pop3(riki@domain.com): Disconnected: POP3
UIDLs couldn't be listed top=3/2898, retr=0/0, del=0/1192, size=48287015
Running Dovecot 2.2.10+hg-6018854c8c91
Mailboxes were migrated recently using dsync with pop3 migration plugin.
Is there a better way to handle this without logging an error? Am I
doing something wrong?
Any help is appreciated.
Thanks,
Gedalya
# dovecot -n
# 2.2.10: /etc/dovecot/dovecot.conf
# OS: Linux 3.2.0-4-amd64 x86_64 Debian 7.3
auth_mechanisms = plain login cram-md5
auth_verbose = yes
auth_verbose_passwords = plain
dict {
expire = mysql:/etc/dovecot/dovecot-dict-sql.conf.ext
quota = mysql:/etc/dovecot/dovecot-dict-sql.conf.ext
}
disable_plaintext_auth = no
imapc_features = rfc822.size fetch-headers
login_greeting = Dovecot ready
login_log_format_elements = user=<%u> method=%m rip=%r lip=%l
pip=%{real_rip} mpid=%e %c session=<%{session}>
login_trusted_networks = xx.xx.xx.2
mail_gid = vmail
mail_location = /nowhere
mail_plugins = quota expire listescape
mail_uid = vmail
managesieve_sieve_capability = fileinto envelope encoded-character
subaddress comparator-i;ascii-numeric relational regex imap4flags copy
include variables mailbox date ihave
namespace {
hidden = yes
list = no
location = pop3c:
prefix = POP3-MIGRATION-NS/
}
namespace inbox {
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 "Sent Messages" {
special_use = \Sent
}
mailbox Trash {
auto = subscribe
special_use = \Trash
}
prefix =
separator = /
type = private
}
passdb {
args = /etc/dovecot/dovecot-sql.conf.ext
driver = sql
}
plugin {
antispam_backend = pipe
antispam_pipe_program = /usr/bin/ssh
antispam_pipe_program_args =
-l;spamd;-i;/etc/dovecot/sareport.key;mx.domain.com
antispam_pipe_program_notspam_arg = revoke
antispam_pipe_program_spam_arg = report
antispam_pipe_tmpdir = /tmp
antispam_spam = Junk
antispam_trash_pattern_ignorecase = trash;Deleted *
expire = Trash
expire2 = Trash/*
expire3 = Junk
expire_dict = proxy::expire
pop3_migration_mailbox = POP3-MIGRATION-NS/INBOX
quota = dict:user::proxy::quota
quota_rule = *:storage=2G
quota_rule2 = Trash:storage=+250M
quota_rule3 = Junk:ignore
quota_warning = storage=99%% quota-warning 99 %u
quota_warning2 = storage=95%% quota-warning 95 %u
sieve = ~/.dovecot.sieve
sieve_before = /etc/dovecot/sieve-global/fileinto-spam.sieve
sieve_dir = ~/sieve
sieve_extensions = -vacation -body -reject -enotify -environment
-virustest -spamtest
sieve_max_actions = 32
sieve_max_redirects = 4
sieve_max_script_size = 10K
sieve_quota_max_scripts = 100
sieve_quota_max_storage = 4M
}
pop3_no_flag_updates = yes
postmaster_address = postmaster@domain.com
protocols = imap pop3 lmtp sieve
service auth-worker {
user = $default_internal_user
}
service auth {
client_limit = 2448
unix_listener auth-userdb {
group = root
mode = 0600
user = vmail
}
}
service dict {
unix_listener dict {
group = root
mode = 0600
user = vmail
}
}
service imap-login {
process_min_avail = 4
service_count = 0
vsz_limit = 192 M
}
service imap-postlogin {
executable = script-login /usr/local/bin/postlogin
unix_listener imap-postlogin {
group = root
mode = 0600
user = vmail
}
user = root
}
service imap {
executable = imap imap-postlogin
process_limit = 1024
vsz_limit = 128 M
}
service lmtp {
inet_listener lmtp {
address = 10.44.23.1
port = 7025
}
}
service managesieve-login {
inet_listener sieve {
port = 4190
}
service_count = 0
vsz_limit = 64 M
}
service managesieve {
process_limit = 20
}
service pop3-login {
process_min_avail = 4
service_count = 0
vsz_limit = 192 M
}
service pop3 {
executable = pop3 imap-postlogin
process_limit = 1024
}
service quota-warning {
executable = script /usr/local/bin/quota-warning
unix_listener quota-warning {
user = vmail
}
user = dovecot
}
ssl_cert = </etc/dovecot/dovecot.pem
ssl_key = </etc/dovecot/private/dovecot.pem
userdb {
driver = prefetch
}
userdb {
args = /etc/dovecot/dovecot-sql.conf.ext
driver = sql
}
verbose_proctitle = yes
protocol lmtp {
mail_plugins = quota expire listescape sieve
plugin {
quota = dict:user::noenforcing:proxy::quota
}
}
protocol lda {
mail_plugins = quota expire listescape sieve
}
protocol imap {
mail_max_userip_connections = 12
mail_plugins = quota expire listescape imap_quota antispam
ssl_cert = </etc/dovecot/imap.domain.com.crt
ssl_key = </etc/dovecot/private/imap.domain.com.key
}
protocol sieve {
mail_max_userip_connections = 5
}
protocol pop3 {
mail_max_userip_connections = 10
ssl_cert = </etc/dovecot/pop.domain.com.crt
ssl_key = </etc/dovecot/private/pop.domain.com.key
}
protocol doveadm {
mail_plugins = quota expire listescape pop3_migration
}