Ubuntu Dovecot 2.2.9 several Errors, Transaction log as well as BUG message

[Kein Name]

Thanks for the advice, sadly the VM hoster uses Qemu with an ancient crappy
kernel and does not offer any way to move upwards to 16.04 with dovecot
2.2.22.
All I could do is try to force the 16.04 packages into the 14.04 system,
which would likely add more problems than solve these :/

Stefan

2017-03-23 9:52 GMT+01:00 Aki Tuomi <aki.tuomi at dovecot.fi>:

> 2.2.9 is rather old. Updating to a more recent version could help.
>
> Aki
>
>
> On 23.03.2017 10:48, Kein Name wrote:
> > Hello List,
> >
> > I am running an Ubuntu 14.04.5 LTS Server with Dovecot 2.2.9, only local
> > filesystems and authentication done via mysql backend.
> > Server is a Strato Virtual Server running
> > 2.6.32-042stab120.11 #1 SMP Fri Mar 10 16:52:50 MSK 2017 i686 i686 i686
> > GNU/Linux
> >
> > Sometimes I see errors in the log like this for one user:
> >
> > Error: Transaction log /var/vmail/
> > example.net/jena/Maildir/.Archives.2017/dovecot.index.log: duplicate
> > transaction log sequence (2)
> >
> > After seeing these, some time later, (mostly 2h), Dovecot starts to deny
> > login from all clients with messages like this:
> >
> > Mar 23 01:32:27 h2312250 dovecot: auth: Error: BUG: Authentication client
> > sent unknown handshake command:
> > REQUEST?1804861441?19318?1?9ce500129289a0237e4e85a6c880a047?
> session_pid=19323...
> > Mar 23 01:32:27 h2312250 dovecot: imap: Error: Authentication server
> didn't
> > send valid SPID as expected: MECH#011PLAIN#011plaintext
> > Mar 23 01:32:27 h2312250 dovecot: imap: Error: Disconnected from auth
> > server, aborting (client-pid=19318 client-id=1)
> > Mar 23 01:32:27 h2312250 dovecot: imap-login: Internal login failure
> > (pid=19318 id=1) (internal failure, 1 successful auths): user=<
> > user at example.net>, method=PLAIN, rip=X, lip=X, mpid=19323,
> > session=<G9f4AltL4ABRqZ4X>
> >
> > I do not know if these problems have something to do with each other or
> > not. But it happened several times now (maybe once or twice every month
> or
> > so).
> > When I restart Dovecot, the error seems gone for the moment, until it
> comes
> > back in a month or some weeks.
> >
> >
> > For reference, here is the running config:
> >
> > dovecot.conf
> >
> > # 2.2.9: /etc/dovecot/dovecot.conf
> > # OS: Linux 2.6.32-042stab120.11 i686 Ubuntu 14.04.5 LTS
> > auth_mechanisms = plain login
> > auth_verbose = yes
> > disable_plaintext_auth = no
> > log_timestamp = "%Y-%m-%d %H:%M:%S "
> > 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-mysql.conf
> >   driver = sql
> > }
> > plugin {
> >   quota = maildir:User quota
> >   quota_rule = *:bytes=10M
> >   sieve = ~/dovecot.sieve
> > }
> > protocols = imap pop3 sieve
> > service auth {
> >   unix_listener /var/spool/postfix/private/auth {
> >     group = postfix
> >     mode = 0660
> >     user = postfix
> >   }
> >   unix_listener auth-master {
> >     mode = 0600
> >     user = vmail
> >   }
> >   user = root
> > }
> > ssl_cert = </etc/postfix/sslcert/mailserver.crt
> > ssl_key = </etc/postfix/sslcert/mailserver.key
> > userdb {
> >   args = /etc/dovecot/dovecot-mysql.conf
> >   driver = sql
> > }
> > protocol pop3 {
> >   mail_plugins = quota
> >   pop3_uidl_format = %08Xu%08Xv
> > }
> > protocol imap {
> >   mail_plugins = quota imap_quota
> > }
> > protocol lda {
> >   auth_socket_path = /var/run/dovecot/auth-master
> >   mail_plugins = sieve quota
> >   postmaster_address = postmaster at example.net
> >   quota_full_tempfail = yes
> > }
> >
> >
> > dovecot-mysql.conf
> >
> > driver = mysql
> > connect = host=localhost dbname=mail user=user password=XXX
> > default_pass_scheme = CRYPT
> > password_query = SELECT password FROM users WHERE email = '%u'
> > user_query = SELECT
> > CONCAT('/var/vmail/',SUBSTRING_INDEX(email,'@',-1),'/',
> SUBSTRING_INDEX(email,'@',1),'/')
> > AS home,
> > CONCAT('maildir:/var/vmail/',SUBSTRING_INDEX(email,'@',-1),'
> /',SUBSTRING_INDEX(email,'@',1),'/Maildir/')
> > AS mail, 5000 AS uid, 5000 AS gid, concat('*:bytes=', quota) AS
> quota_rule
> > FROM users WHERE email = '%u'
> >
> >
> > Any help is appreciated.
> > Thanks
> > Stefan Koenig
>