[Dovecot] dovecot.index-Errors with multiple IMAP client access in Dovecot 2.2

2 Dec 2013

      Hello list,
I hope you can help me!
My self-compiled dovecot 2.2.6 (and the two minor versions before, too)
throws that errors:
Nov 28 18:29:00 mailserv dovecot: imap(martin@example.com): Error:
Transaction log /srv/vmail/example.com/martin/Maildir/dovecot.index.log:
duplicate transaction log sequence (25)
Nov 28 18:29:00 mailserv dovecot: imap(martin@example.com): Error:
/srv/vmail/example.com/martin/Maildir/dovecot.index log position went
backwards (24,40 < 25,10028)
... and so on ... duplicate transaction log sequences and backwards gone
log positions, and this always, when I use at least two IMAP clients at
the same time (better: the two clients are online and logged in at the
same time).
That happens only with one user (me ;-) ), the other about 15 users on
this server are having no problems.
What I see: the clients are bothering each other, but I don't know, why.
I thought about the used reiserfs filesystem on the server, but there
were no problems with 1.2 on the same server.
Some words about my client setup: I use Thunderbird and iPhone at the
same time, and as a third client on the same Server there is a
Thunderbird instance at my company, which runs parallel to the other
two. Seems to be weired, but isn't really (IMHO ;-) ).
Sometimes there are two TBs at the same mailbox, sometimes only the
iPhone and a TB, sometimes all three.
This runs quite good for long time with dovecot 1.2 and 2.1.x (the last
one at my company in a similary setup with more users and several
clients at the same time).
Maybe there is an error by using "my" build configurations (I think, not)?
---- configures -------------------
./configure 

--prefix=/usr/local 

--with-sql 

--with-ssl 

--with-mysql

Here are my dovecot.conf (only the changes of defaults) - maybe there is
a misconfiguration?
---- dovecot.conf -----------------
# 2.2.6: /etc/dovecot/dovecot.conf
# OS: Linux 2.6.18-028stab101.1 x86_64 Ubuntu 10.04.4 LTS reiserfs
auth_master_user_separator = *
auth_mechanisms = plain login
auth_socket_path = /usr/local/var/run/dovecot/auth-master
default_internal_user = vmail
default_login_user = vmail
dict {
acl = mysql:/etc/dovecot/dovecot-dict-acl-sql.conf.ext
}
disable_plaintext_auth = no
imap_capability = +NAMESPACE
imap_client_workarounds = delay-newmail tb-lsub-flags tb-lsub-flags
tb-extra-mailbox-sep
listen = *
log_timestamp = "%Y-%m-%d %H:%M:%S "
login_log_format_elements = user=<%u> method=%m rip=%r lip=%l %c
mail_access_groups = vmail
mail_location = maildir:/srv/vmail/%d/%n/Maildir
mail_privileged_group = vmail
mail_uid = vmail
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 ihave imapflags notify
namespace {
list = yes
location = maildir:%%Lh/Maildir/:INDEX=%%Lh/shared-idx/%%u
prefix = shared/%%u/
separator = /
subscriptions = no
type = shared
}
namespace {
hidden = no
list = yes
location = maildir:/srv/vmail/public
prefix = public/
separator = /
subscriptions = no
type = public
}
namespace inbox {
hidden = no
inbox = yes
list = 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" {
auto = subscribe
special_use = \Sent
}
mailbox Spam {
auto = subscribe
special_use = \Junk
}
mailbox Trash {
auto = subscribe
special_use = \Trash
}
prefix =
separator = /
subscriptions = yes
type = private
}
passdb {
args = /etc/dovecot/dovecot-sql.conf.ext
driver = sql
}
plugin {
acl = vfile
acl_shared_dict = proxy::acl
autocreate = Trash
autocreate2 = Spam
autocreate3 = Sent
autocreate4 = Drafts
autosubscribe = Trash
autosubscribe2 = Spam
autosubscribe3 = Sent
autosubscribe4 = Drafts
sieve = ~/.dovecot.sieve
sieve_after = /srv/vmail/sieve/after.sieve
sieve_before = /srv/vmail/sieve/before.sieve
sieve_dir = ~/sieve
sieve_extensions = +notify +imapflags
sieve_global_dir = /srv/vmail/sieve
sieve_global_path = /srv/vmail/sieve/globalsieverc
}
pop3_client_workarounds = outlook-no-nuls oe-ns-eoh
postmaster_address = postmaster@%d
protocols = imap pop3
quota_full_tempfail = yes
service auth {
unix_listener /var/spool/postfix/private/auth {
group = postfix
mode = 0660
user = postfix
}
unix_listener /var/spool/postfix/private/dovecot-auth {
group = postfix
mode = 0660
user = postfix
}
unix_listener auth-master {
group = vmail
mode = 0600
user = vmail
}
unix_listener auth-userdb {
group = vmail
mode = 0600
user = vmail
}
}
service dict {
unix_listener dict {
group = vmail
mode = 0660
user = vmail
}
}
service imap-login {
inet_listener imaps {
port = 993
ssl = yes
}
}
service imap {
process_limit = 2048
vsz_limit = 256 M
}
service managesieve-login {
inet_listener sieve {
port = 4190
}
inet_listener sieve_deprecated {
port = 2000
}
}
service pop3-login {
inet_listener pop3 {
port = 110
}
}
ssl_cert = 
local 1.2.3.4 {
ssl_cert = 

Thank you very much for your time and help!
Greetings,
Martin

[Dovecot] dovecot.index-Errors with multiple IMAP client access in Dovecot 2.2

Martin Rabl