[Dovecot] too many files opened
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
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
Hello,
On Wed, Aug 29, 2007 at 10:06:41AM +0800, Joshua, C.S. Chen wrote:
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
This looks similar to [221572]. We don't know what was causing that though. I can imagine that even [154314] may be causing that (which is hopefully getting fixed in RHEL 5.2).
[221572] https://bugzilla.redhat.com/show_bug.cgi?id=221572 [154314] https://bugzilla.redhat.com/show_bug.cgi?id=154314
passdb: driver: pam userdb: driver: passwd
Please, try to use userdb ldap in dovecot.conf. That way you don't use nss_ldap, which is buggy.
-- Tomas Janousek, SW Engineer, Red Hat, Inc.
On Wed, 2007-08-29 at 10:06 +0800, 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
rc5 is pretty old. There are v1.0.x packages for RHEL5.
dovecot: Aug 29 09:23:59 Error: auth(default): pam(joshua,192.168.177.52): pipe() failed: Too many open files
Look at dovecot-auth process's list of open files:
ls -l /proc/pidof dovecot-auth/fd/
How many are there and what are opened most of the time?
auth default: passdb: driver: pam userdb: driver: passwd
Are you using also nss_ldap? See http://wiki.dovecot.org/AuthDatabase/Passwd. With rc5 you can't fix it properly, and that could also be the cause of your problems.
participants (3)
-
Joshua, C.S. Chen
-
Timo Sirainen
-
Tomas Janousek