dovecot - Sep 2007 - Disconnected: Shutting down:

Hello,

dovecot-1.0.3 on Fedora 6 works perfect in general but sometimes the system 
becomes unresponsive and the log file shows tons of messages like this:


  ...   imap-login: Disconnected: Shutting down: 127.0.0.1, secured
  ...   pop3-login: Disconnected: Shutting down: aa.bb.cc.dd


Restarting dovecot helps, but what's behind? 
What can I do to prevent this?


dovecot -n output:

# 1.0.3: /usr/local/dovecot/etc/dovecot.conf
base_dir: /var/run/dovecot/
protocols: imap imaps pop3 pop3s
ssl_cert_file: /usr/local/dovecot/etc/mailbox.pem
ssl_key_file: /usr/local/dovecot/etc/mailbox.key
disable_plaintext_auth: no
login_dir: /var/run/dovecot//login
login_executable(default): /usr/local/dovecot/libexec/dovecot/imap-login
login_executable(imap): /usr/local/dovecot/libexec/dovecot/imap-login
login_executable(pop3): /usr/local/dovecot/libexec/dovecot/pop3-login
login_greeting: TU-Berlin.DE POP3-/IMAP Service ready
login_log_format_elements: %u %r %c
login_processes_count: 20
verbose_proctitle: yes
mail_location: maildir:/var/Mail/Boxes/%1u/%u
mailbox_idle_check_interval: 15
maildir_copy_with_hardlinks: yes
maildir_copy_preserve_filename: yes
mail_executable(default): /usr/local/dovecot/libexec/dovecot/imap
mail_executable(imap): /usr/local/dovecot/libexec/dovecot/imap
mail_executable(pop3): /usr/local/dovecot/libexec/dovecot/pop3
mail_plugins(default): quota imap_quota
mail_plugins(imap): quota imap_quota
mail_plugins(pop3): quota
mail_plugin_dir(default): /usr/local/dovecot/lib/dovecot/imap
mail_plugin_dir(imap): /usr/local/dovecot/lib/dovecot/imap
mail_plugin_dir(pop3): /usr/local/dovecot/lib/dovecot/pop3
mail_log_prefix: %Ls(%u): 
imap_client_workarounds(default): delay-newmail outlook-idle netscape-eoh tb-ext
ra-mailbox-sep
imap_client_workarounds(imap): delay-newmail outlook-idle netscape-eoh tb-extra-
mailbox-sep
imap_client_workarounds(pop3): outlook-idle
pop3_uidl_format(default): 
pop3_uidl_format(imap): 
pop3_uidl_format(pop3): %08Xu%08Xv
pop3_client_workarounds(default): 
pop3_client_workarounds(imap): 
pop3_client_workarounds(pop3): outlook-no-nuls oe-ns-eoh
auth default:
  mechanisms: plain login anonymous
  count: 20
  passdb:
    driver: ldap
    args: /usr/local/dovecot/etc/dovecot-ldap.conf
  userdb:
    driver: static
    args: uid=777 gid=12
plugin:
  quota: maildir:ignore=Trash


Best regards   ______________________________________________________________ 
Frank Elsner  /                        c/o  Technische Universitaet Berlin   |
 ____________/                              tubIT [BD], Sekr. E-N 50         |
|                                           Einsteinufer 17                  |
| Phone: +49 30 314 23897                   D-10587 Berlin                   |
| eMail: Frank.Elsner at TU-Berlin.DE          Germany       
__________________|
|_________________________________________________________| in dubio pro exim

On Tue, 11 Sep 2007 08:34:43 +0200 Frank Elsner (that's me)
wrote:
> 
> Hello,
> 
> dovecot-1.0.3 on Fedora 6 works perfect in general but sometimes the system
> becomes unresponsive and the log file shows tons of messages like this:
> 
> 
>   ...   imap-login: Disconnected: Shutting down: 127.0.0.1, secured
>   ...   pop3-login: Disconnected: Shutting down: aa.bb.cc.dd
> 
> 
> Restarting dovecot helps, but what's behind? 
> What can I do to prevent this?
To answer my own question :-)

I guess I found the solution. 
login_max_processes_count = 256 (default is 128)

And currently with ~180 we are far above the former used default.



--Frank Elsner