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Patrick Westenberg

2013-Sep-09 09:13 UTC

[Dovecot] Ring SYNC appears to have got lost, resending after upgrade

Hi @all,

on Saturday I upgraded two dovecot servers from squeeze to wheezy and
dovecot from 2.1.x to 2.2.5 (compiled from sources). After the upgrade
everything worked fine at first.

On Sunday Morning I recognized these errors (they occured after a reload 
for logging purpose on midnight) on one server:

director: Error: Ring SYNC appears to have got lost, resending

After reloading/restarting both dovecot services the error occured on
both servers. After some research I deleted some "zlib"-File which
isn't needed anymore in dovecot 2.2.x and reinstalled dovecot. The
error message disappeared.

Today the error occured again (after the reload on midnight) and again
on one node only until reloading/restarting the other node too.
However, there is an additional error message:

Sep 09 10:27:07 director: Error: Ring SYNC appears to have got lost, 
resending
Sep 09 10:27:10 director: Panic: file login-connection.c: line 88 
(login_host_callback): assertion failed: (strncmp(request->line,
"OK\t",
3) == 0)


Any ideas?

Patrick




node1:
# 2.2.5: /usr/local/etc/dovecot/dovecot.conf
# OS: Linux 3.2.0-4-amd64 x86_64 Debian 7.1
auth_mechanisms = plain login
director_mail_servers = 172.17.1.2 172.17.1.1
director_servers = 172.17.1.3 172.17.1.4
director_user_expire = 5 mins
lmtp_proxy = yes
log_path = /var/log/dovecot.log
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
protocols = imap pop3 lmtp sieve
service auth {
   unix_listener /var/spool/postfix/private/auth {
     group = postfix
     mode = 0666
     user = postfix
   }
   unix_listener auth-userdb {
     user = dovecot
   }
}
service director {
   fifo_listener login/proxy-notify {
     mode = 0666
   }
   inet_listener {
     address = 172.17.1.3
     port = 9090
   }
   unix_listener director-userdb {
     mode = 0600
   }
   unix_listener login/director {
     mode = 0666
   }
}
service imap-login {
   executable = imap-login director
}
service lmtp {
   inet_listener lmtp {
     address = 172.17.1.3
     port = 24
   }
}
service managesieve-login {
   executable = managesieve-login director
   inet_listener sieve {
     port = 4190
   }
}
service pop3-login {
   executable = pop3-login director
}
ssl_cert = </etc/ssl/certs/wildcard.xxx.crt
ssl_key = </etc/ssl/private/wildcard.xxx.key
protocol !smtp {
   passdb {
     args = proxy=y nopassword=y starttls=any-cert
     driver = static
   }
}
protocol smtp {
   passdb {
     args = /usr/local/etc/dovecot/dovecot-sql.conf.ext
     driver = sql
   }
   userdb {
     args = /usr/local/etc/dovecot/dovecot-sql.conf.ext
     driver = sql
   }
}
protocol lmtp {
   auth_socket_path = director-userdb
}


node2:
# 2.2.5: /usr/local/etc/dovecot/dovecot.conf
# OS: Linux 3.2.0-4-amd64 x86_64 Debian 7.1
auth_mechanisms = plain login
director_mail_servers = 172.17.1.2 172.17.1.1
director_servers = 172.17.1.4 172.17.1.3
director_user_expire = 5 mins
lmtp_proxy = yes
log_path = /var/log/dovecot.log
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
protocols = imap pop3 lmtp sieve
service auth {
   unix_listener /var/spool/postfix/private/auth {
     group = postfix
     mode = 0666
     user = postfix
   }
   unix_listener auth-userdb {
     user = dovecot
   }
}
service director {
   fifo_listener login/proxy-notify {
     mode = 0666
   }
   inet_listener {
     address = 172.17.1.4
     port = 9090
   }
   unix_listener director-userdb {
     mode = 0600
   }
   unix_listener login/director {
     mode = 0666
   }
}
service imap-login {
   executable = imap-login director
   process_min_avail = 2
   service_count = 0
   vsz_limit = 128 M
}
service lmtp {
   inet_listener lmtp {
     address = 172.17.1.4
     port = 24
   }
}
service managesieve-login {
   executable = managesieve-login director
   inet_listener sieve {
     port = 4190
   }
}
service pop3-login {
   executable = pop3-login director
}
ssl_cert = </etc/ssl/certs/wildcard.xxx.crt
ssl_key = </etc/ssl/private/wildcard.xxx.key
protocol !smtp {
   passdb {
     args = proxy=y nopassword=y starttls=any-cert
     driver = static
   }
}
protocol smtp {
   passdb {
     args = /usr/local/etc/dovecot/dovecot-sql.conf.ext
     driver = sql
   }
   userdb {
     args = /usr/local/etc/dovecot/dovecot-sql.conf.ext
     driver = sql
   }
}
protocol lmtp {
   auth_socket_path = director-userdb
}

/dev/rob0

2013-Sep-09 12:41 UTC

head link

[Dovecot] Ring SYNC appears to have got lost, resending after upgrade

On Mon, Sep 09, 2013 at 11:13:36AM +0200, Patrick Westenberg
wrote:> on Saturday I upgraded two dovecot servers from squeeze to wheezy 
> and dovecot from 2.1.x to 2.2.5 (compiled from sources). After the 
> upgrade everything worked fine at first.
> 
> On Sunday Morning I recognized these errors (they occured after a
> reload for logging purpose on midnight) on one server:
> 
> director: Error: Ring SYNC appears to have got lost, resending
> 
> After reloading/restarting both dovecot services the error occured 
> on both servers. After some research I deleted some "zlib"-File 
> which isn't needed anymore in dovecot 2.2.x and reinstalled 
> dovecot. The error message disappeared.
> 
> Today the error occured again (after the reload on midnight) and 
> again on one node only until reloading/restarting the other node 
> too. However, there is an additional error message:
> 
> Sep 09 10:27:07 director: Error: Ring SYNC appears to have got 
> lost, resending
> Sep 09 10:27:10 director: Panic: file login-connection.c: line 88
> (login_host_callback): assertion failed: (strncmp(request->line,
> "OK\t", 3) == 0)
I had the same issue (CentOS 6.4 upgraded with third-party RPMs) on 
Thu/Fri, and I asked Timo about it in IRC. Apparently a 2.2.6 release 
is due soon. He gave me two hg links claimed to fix it:

http://hg.dovecot.org/dovecot-2.2/rev/f7a37b169f4a 
http://hg.dovecot.org/dovecot-2.2/rev/9531ec8afe8b

However I did have the lost ring SYNC error recur after the cluster 
was upgraded to the RPM packages currently in Dovecot's EE repo 
(non-free, pay for access) which does include these fixes.

Restart of all director instances worked for me. Actually I stopped 
all, then started all.

So far so good. We're going to go live with this cluster soon, I 
hope.

> node1:
> # 2.2.5: /usr/local/etc/dovecot/dovecot.conf
> # OS: Linux 3.2.0-4-amd64 x86_64 Debian 7.1
> auth_mechanisms = plain login
> director_mail_servers = 172.17.1.2 172.17.1.1
> director_servers = 172.17.1.3 172.17.1.4
> director_user_expire = 5 mins
> lmtp_proxy = yes
> log_path = /var/log/dovecot.log
> 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
> protocols = imap pop3 lmtp sieve
> service auth {
>   unix_listener /var/spool/postfix/private/auth {
>     group = postfix
>     mode = 0666
>     user = postfix
>   }
>   unix_listener auth-userdb {
>     user = dovecot
>   }
> }
> service director {
>   fifo_listener login/proxy-notify {
>     mode = 0666
>   }
>   inet_listener {
>     address = 172.17.1.3
>     port = 9090
>   }
>   unix_listener director-userdb {
>     mode = 0600
>   }
>   unix_listener login/director {
>     mode = 0666
>   }
> }
> service imap-login {
>   executable = imap-login director
> }
> service lmtp {
>   inet_listener lmtp {
>     address = 172.17.1.3
>     port = 24
>   }
> }
> service managesieve-login {
>   executable = managesieve-login director
>   inet_listener sieve {
>     port = 4190
>   }
> }
> service pop3-login {
>   executable = pop3-login director
> }
> ssl_cert = </etc/ssl/certs/wildcard.xxx.crt
> ssl_key = </etc/ssl/private/wildcard.xxx.key
> protocol !smtp {
>   passdb {
>     args = proxy=y nopassword=y starttls=any-cert
>     driver = static
>   }
> }
> protocol smtp {
>   passdb {
>     args = /usr/local/etc/dovecot/dovecot-sql.conf.ext
>     driver = sql
>   }
>   userdb {
>     args = /usr/local/etc/dovecot/dovecot-sql.conf.ext
>     driver = sql
>   }
> }
> protocol lmtp {
>   auth_socket_path = director-userdb
> }
> 
> 
> node2:
> # 2.2.5: /usr/local/etc/dovecot/dovecot.conf
> # OS: Linux 3.2.0-4-amd64 x86_64 Debian 7.1
> auth_mechanisms = plain login
> director_mail_servers = 172.17.1.2 172.17.1.1
> director_servers = 172.17.1.4 172.17.1.3
> director_user_expire = 5 mins
> lmtp_proxy = yes
> log_path = /var/log/dovecot.log
> 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
> protocols = imap pop3 lmtp sieve
> service auth {
>   unix_listener /var/spool/postfix/private/auth {
>     group = postfix
>     mode = 0666
>     user = postfix
>   }
>   unix_listener auth-userdb {
>     user = dovecot
>   }
> }
> service director {
>   fifo_listener login/proxy-notify {
>     mode = 0666
>   }
>   inet_listener {
>     address = 172.17.1.4
>     port = 9090
>   }
>   unix_listener director-userdb {
>     mode = 0600
>   }
>   unix_listener login/director {
>     mode = 0666
>   }
> }
> service imap-login {
>   executable = imap-login director
>   process_min_avail = 2
>   service_count = 0
>   vsz_limit = 128 M
> }
> service lmtp {
>   inet_listener lmtp {
>     address = 172.17.1.4
>     port = 24
>   }
> }
> service managesieve-login {
>   executable = managesieve-login director
>   inet_listener sieve {
>     port = 4190
>   }
> }
> service pop3-login {
>   executable = pop3-login director
> }
> ssl_cert = </etc/ssl/certs/wildcard.xxx.crt
> ssl_key = </etc/ssl/private/wildcard.xxx.key
> protocol !smtp {
>   passdb {
>     args = proxy=y nopassword=y starttls=any-cert
>     driver = static
>   }
> }
> protocol smtp {
>   passdb {
>     args = /usr/local/etc/dovecot/dovecot-sql.conf.ext
>     driver = sql
>   }
>   userdb {
>     args = /usr/local/etc/dovecot/dovecot-sql.conf.ext
>     driver = sql
>   }
> }
> protocol lmtp {
>   auth_socket_path = director-userdb
> }
> 
-- 
  http://rob0.nodns4.us/ -- system administration and consulting
  Offlist GMX mail is seen only if "/dev/rob0" is in the Subject:

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