On 13/06/13 04:31, Timo Sirainen wrote:

On Tue, 2013-06-11 at 00:34 +0200, John Fawcett wrote:

...

Hi I came across this error which happend immedately after a mail delivery to the inbox. Should I look for the problem externally to dovecot (ie. file system, operating system) or within dovecot? I never saw this error before installing 2.2.1, with 2.2.2 I seemed to get even more of them so currently back on 2.2.1

Jun 11 00:00:05 rosalia dovecot: imap(myemail@mydomain): Error: Corrupted transaction log file /var/vmail/mydomain/myemail@mydomain/dovecot.index.log seq 311: file size shrank (1184 < 1304) (sync_offset=1304) Are you using NFS or some other cluster filesystem with multiple servers? If yes, see http://wiki2.dovecot.org/NFS. If not, show doveconf -n and describe the setup more.

TImo

thanks for your response. There is no NFS involved. The file system seems to be reiserfs (as reported by df -T) thogh I wonder why fsck reports it would use fsck.ext2 (which I did not run).

It is a single server vpn container hosting a few sites and low volume mail service. The operating system is centos 6.4

The setup is with postfix, amavisd and dovecot using sieve. Dovecot and sieve are built from source

Clients are roundcube and usual mail clients mainly thunderbird.

I cannot link the errors to anything specific, except that they started happening 5 minutes after upgrade to 2.2.1 from 2.1.5. The error happens on multiple mailboxes. I never saw the error prior to that, looking at logs back to version 2.1.7.

Below is the dovecot -n output

Thanks John

dovecot -n # 2.2.1: /etc/dovecot/dovecot.conf # OS: Linux 2.6.18-028stab092.1 x86_64 CentOS release 6.4 (Final) auth_mechanisms = plain login dict { expire = mysql:/etc/dovecot/dovecot-dict-sql.conf.ext quota = mysql:/etc/dovecot/dovecot-dict-sql.conf.ext } first_valid_uid = 200 listen = 80.237.194.64 mail_plugins = quota expire 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 passdb { args = /etc/dovecot/dovecot-sql.conf.ext driver = sql } plugin { expire = Trash expire2 = Trash/* expire3 = Spam expire4 = Postmaster expire_dict = proxy::expire fts = squat fts_squat = partial=4 full=10 quota = dict:User quota::proxy::quota quota_rule = *:storage=1G quota_rule2 = Trash:storage=+100M sieve = ~/sieve/.dovecot.sieve sieve_dir = ~/sieve } protocols = imap pop3 lmtp sieve service auth-worker { user = $default_internal_user } service auth { unix_listener auth-userdb { group = mail mode = 0660 } } service dict { unix_listener dict { group = mail mode = 0660 } } service lmtp { unix_listener /var/spool/postfix/private/dovecot-lmtp { group = postfix mode = 0660 user = postfix } } ssl_cert =

On 3.7.2013, at 4.10, John Fawcett john.ml@erba.tv wrote:

...

...

...

Jun 11 00:00:05 rosalia dovecot: imap(myemail@mydomain): Error: Corrupted transaction log file /var/vmail/mydomain/myemail@mydomain/dovecot.index.log seq 311: file size shrank (1184 < 1304) (sync_offset=1304) Are you using NFS or some other cluster filesystem with multiple servers? If yes, see http://wiki2.dovecot.org/NFS. If not, show doveconf -n and describe the setup more. thanks for your response. There is no NFS involved. The file system seems to be reiserfs (as reported by df -T) thogh I wonder why fsck reports it would use fsck.ext2 (which I did not run). The log corruptions are continuing, I now have 2.2.4 installed. They always seem to happen in proximty to a mail delivery.

Is there anything that anyone can suggest for how to get a step closer to diagnoising the cause? Is there some debugging I can put on that would be useful?

If this problem is happening only because of reiserfs (and it kind of seems that way), I don't think there's anything that can be done except to move away from it. It's been a long time since I've heard of any problems related to Dovecot's handling of index files that didn't involve some non-POSIX filesystem, so I'm kind of thinking the problem has more to do with reiserfs than Dovecot.

You could of course keep the maildirs in reiserfs and just move Dovecot's index files to tmpfs. That would work well as long as you didn't have to reboot (after reboot your performance would be more or less bad for a while).