[Dovecot] 1.1.16 stops authenticating users after several days

[Juergen Obermann]

Hello,

we use dovecot v1.1.16 on two servers with Solaris 9. This week both suddenly
stopped authenticating users. The first server was startet on Jun 2 and ran
until Jun 18 and the other startet on Jun 3 and failed on Jun 15. Both generated
then lots of error messages, three for every user that attemps to login, looking
like that:

Jun 15 08:35:23 minerva dovecot-auth[20831]: [ID 401707 user.error] open_module:
/usr/lib/security/pam_unix_account.so.1 failed: ld.so.1: dovecot-auth: fatal:
/usr/lib/security/pam_unix_account.so.1: open failed: No such file or directory
Jun 15 08:35:23 minerva dovecot-auth[20831]: [ID 487707 user.error]
load_modules: can not open module /usr/lib/security/pam_unix_account.so.1 
Jun 15 08:35:23 minerva dovecot: [ID 107833 local0.error] auth-worker(default):
pam(gp1071,134.176.2.89): pam_acct_mgmt() failed: Dlopen failure

The file /usr/lib/security/pam_unix_account.so.1 was still there and had not been changed.

Until these events there have been on both servers circa 1.600.000 logins. 

After a restart dovecot did work again.

The configuration is:

# ulimit -n 8192

# /opt/local/sbin/dovecot -n
# 1.1.16: /opt/local/etc/dovecot.conf
# OS: SunOS 5.9 sun4u  
syslog_facility: local0
protocols: imap imaps pop3 pop3s
ssl_cert_file: /etc/ssl/server.crt
ssl_key_file: /etc/ssl/server.key
disable_plaintext_auth: no
version_ignore: yes
login_dir: /opt/local/var/run/dovecot/login
login_executable(default): /opt/local/libexec/dovecot/imap-login
login_executable(imap): /opt/local/libexec/dovecot/imap-login
login_executable(pop3): /opt/local/libexec/dovecot/pop3-login
login_process_per_connection: no
login_processes_count: 12
max_mail_processes: 4096
mail_location: mbox:~/Mail:INBOX=/var/mail/%u
mmap_disable: yes
mail_nfs_storage: yes
mail_nfs_index: yes
mail_executable(default): /opt/local/libexec/dovecot/imap
mail_executable(imap): /opt/local/libexec/dovecot/imap
mail_executable(pop3): /opt/local/libexec/dovecot/pop3
mail_plugins(default): quota imap_quota
mail_plugins(imap): quota imap_quota
mail_plugins(pop3): quota
mail_plugin_dir(default): /opt/local/lib/dovecot/imap
mail_plugin_dir(imap): /opt/local/lib/dovecot/imap
mail_plugin_dir(pop3): /opt/local/lib/dovecot/pop3
imap_client_workarounds(default): delay-newmail netscape-eoh tb-extra-mailbox-sep
imap_client_workarounds(imap): delay-newmail netscape-eoh tb-extra-mailbox-sep
imap_client_workarounds(pop3): 
pop3_uidl_format(default): %08Xu%08Xv
pop3_uidl_format(imap): %08Xu%08Xv
pop3_uidl_format(pop3): %08Xv%08Xu
pop3_client_workarounds(default): 
pop3_client_workarounds(imap): 
pop3_client_workarounds(pop3): outlook-no-nuls oe-ns-eoh
namespace:
  type: private
  separator: /
  inbox: yes
  list: yes
  subscriptions: yes
namespace:
  type: private
  separator: /
  prefix: Mail/
  hidden: yes
  subscriptions: yes
auth default:
  passdb:
    driver: pam
  userdb:
    driver: passwd
plugin:
  quota: fs:Home-Verzeichnis

Greetings,
Jürgen

-- 
Hochschulrechenzentrum der | Mail: Juergen.Obermann at hrz.uni-giessen.de
Justus-Liebig-Universitaet | WWW:  http://www.uni-giessen.de/~g033
Heinrich-Buff-Ring 44      | Tel:  0641-99-13054 (0641-99-13001)
D-35392 Giessen, Germany   | Fax:  0641-99-13009