[Dovecot] too many files opened

[Joshua, C.S. Chen]

Joshua, C.S. Chen wrote:
> Hi folks,
> My institute's mail server was upgraded to RHEL5 with dovecot 1.0-2.1rc5
> recently. And it uses PAM authentication which points to LDAP server.
> Now from time to time it gets Error like
>
> dovecot: Aug 29 09:23:59 Error: auth(default):
> pam(joshua,192.168.177.52): pipe() failed: Too many open files
>
>
> and users can not login. My config is like
>
> dovecot -n
>
> # /etc/dovecot.conf
> base_dir: /var/run/dovecot/
> log_path: /var/log/dovecot
> info_log_path: /var/log/dovecot
> listen: *
> 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_greeting: ASIAA Dovecot ready.
> login_processes_count: 4
> mail_location:
> mbox:/asiaa/home/%u/:/asiaa/home/%u/mail/:INBOX=/var/mail/%u:INDEX=/asiaa/home/%u/mail/dovecot_indexes
> mail_debug: yes
> mail_full_filesystem_access: yes
> mail_drop_priv_before_exec: yes
> mail_executable(default): /etc/dovecot_postlogin_beforeimap.sh
> mail_executable(imap): /etc/dovecot_postlogin_beforeimap.sh
> mail_executable(pop3): /etc/dovecot_postlogin_beforepop3.sh
> mail_process_size: 512
> mail_plugin_dir(default): /usr/lib/dovecot/imap
> mail_plugin_dir(imap): /usr/lib/dovecot/imap
> mail_plugin_dir(pop3): /usr/lib/dovecot/pop3
> pop3_uidl_format(default): %08Xu%08Xv
> pop3_uidl_format(imap): %08Xu%08Xv
> pop3_uidl_format(pop3): %08Xv%08Xu
> auth default:
> passdb:
> driver: pam
> userdb:
> driver: passwd
>
>
>
>
> Any suggestion or help is appreciated
> Cheers
> Joshua
>   


and here is another symptom:


(/var/log/dovecot)



dovecot: Aug 29 10:14:16 Info: pop3-login: Disconnected: Inactivity:
rip=192.168.176.21, lip=192.168.177.5
dovecot: Aug 29 10:14:24 Info: pop3-login: Disconnected: Inactivity:
rip=192.168.176.22, lip=192.168.177.5
dovecot: Aug 29 10:14:38 Info: pop3-login: Disconnected: Inactivity:
rip=192.168.177.52, lip=192.168.177.5
dovecot: Aug 29 10:14:39 Info: pop3-login: Disconnected: Inactivity:
rip=192.168.176.168, lip=192.168.177.5
dovecot: Aug 29 10:14:56 Info: imap-login: Disconnected: Inactivity:
rip=192.168.176.47, lip=192.168.177.5
dovecot: Aug 29 10:15:13 Info: pop3-login: Disconnected: Inactivity:
rip=192.168.177.28, lip=192.168.177.5
dovecot: Aug 29 10:15:18 Info: imap-login: Disconnected: Inactivity:
rip=192.168.177.174, lip=192.168.177.5, TLS
dovecot: Aug 29 10:15:33 Info: pop3-login: Disconnected: Inactivity:
rip=192.168.176.165, lip=192.168.177.5
dovecot: Aug 29 10:15:35 Info: imap-login: Disconnected: Inactivity:
rip=192.168.177.202, lip=192.168.177.5,

dovecot: Aug 29 10:15:39 Info: pop3-login: Disconnected: Inactivity:
rip=192.168.177.172, lip=192.168.177.5
dovecot: Aug 29 10:15:45 Info: pop3-login: Disconnected: Inactivity:
rip=192.168.176.167, lip=192.168.177.5



than all pop3 clients are waiting,,


Cheers
Joshua