[Dovecot] Worker-server timeout

[Jeffrey Nikoletich]

Hello Everyone,

First wanted to say thanks for any help in advance.

I have a clustered mail system each running on centos 5.2. I have a  
test box that I am running the newest version on dovecot on and I am  
getting some random authnication failed errors. Here is the error below:

Nov 04 17:31:22 auth(default): Error: worker-server(xxx at xxxx.com):  
Aborted: Lookup timed out
Nov 04 17:31:23 auth(default): Info: client out: FAIL	2	user=xxx at xxxx.com 
	temp

The thing is, the errors only show when the user is attempting to send  
a message.

Here is my dovecot -n

# 1.2.5: /etc/dovecot.conf
# OS: Linux 2.6.18-92.el5 x86_64 CentOS release 5.2 (Final) nfs
log_path: /var/log/dovecot
login_dir: /var/run/dovecot/login
login_executable(default): /usr/libexec/dovecot/imap-login
login_executable(imap): /usr/libexec/dovecot/imap-login
login_executable(pop3): /usr/libexec/dovecot/pop3-login
login_process_size: 512
login_processes_count: 500
login_max_processes_count: 5000
login_max_connections: 1000
max_mail_processes: 5000
mail_max_userip_connections: 2000
verbose_proctitle: yes
first_valid_uid: 5000
first_valid_gid: 5000
mail_location: maildir:/export/monster/mail/%d/%n:INDEX=/export/ 
monster/mail/%d/%n
mail_debug: yes
mmap_disable: yes
mail_nfs_storage: yes
mail_nfs_index: yes
maildir_stat_dirs: yes
mbox_read_locks: dotlock
mbox_write_locks: dotlock
mail_executable(default): /usr/libexec/dovecot/imap
mail_executable(imap): /usr/libexec/dovecot/imap
mail_executable(pop3): /usr/libexec/dovecot/pop3
mail_process_size: 512
mail_plugins(default): mail_log
mail_plugins(imap): mail_log
mail_plugins(pop3):
mail_plugin_dir(default): /usr/lib64/dovecot/imap
mail_plugin_dir(imap): /usr/lib64/dovecot/imap
mail_plugin_dir(pop3): /usr/lib64/dovecot/pop3
pop3_save_uidl(default): no
pop3_save_uidl(imap): no
pop3_save_uidl(pop3): yes
pop3_uidl_format(default): %08Xu%08Xv
pop3_uidl_format(imap): %08Xu%08Xv
pop3_uidl_format(pop3): %08Xv%08Xu
lda:
   postmaster_address: xxx at xxxx.net
   mail_plugins: sieve
   log_path: /var/log/dovecot-deliver.log
   info_log_path: /var/log/dovecot-deliver.log
   auth_socket_path: /var/run/dovecot/auth-master
auth default:
   mechanisms: plain login
   failure_delay: 1
   verbose: yes
   debug: yes
   debug_passwords: yes
   worker_max_count: 500
   passdb:
     driver: sql
     args: /etc/dovecot/dovecot-sql.conf
   userdb:
     driver: sql
     args: /etc/dovecot/dovecot-sql.conf
   socket:
     type: listen
     client:
       path: /var/spool/postfix/auth
       mode: 432
       user: postfix
       group: postfix
     master:
       path: /var/run/dovecot/auth-master
       mode: 384
       user: mailowner
       group: mailowner
plugin:
   mail_log_events: delete undelete expunge copy mailbox_delete  
mailbox_rename


Also here is my dovecot-sql.conf

user_query = SELECT '/export/monster/mail/%d/%n' as home, 'maildir:/ 
export/monster/mail/%d/%n:INDEX=/export/monster/mail/%d/%n' as mail,  
5000 AS uid, 5000 AS gid, concat('*:bytes=', quota) AS quota_rule FROM  
mailbox WHERE username ='%u' AND active ='1'
password_query = SELECT MB.password FROM (mailbox as MB) LEFT JOIN  
domain as D ON (D.id=MB.domain_id AND D.active='1') WHERE MB.username  
= '%u' AND MB.active = '1' AND (D.id IS NOT NULL OR (MB.domain_id=0  
and MB.name='SASL'))


I have disabled user prefetch because for some reason, I get this  
error when it is active:

Nov 04 17:05:25 auth(default): Info: prefetch 
(xxx at xxxx.net,xxx.xxx.xxx.xxx): passdb didn't return userdb entries,  
trying the next userdb

Thanks for any help you can offer.

Jeffrey Nikoletich