[Dovecot] login processes killed with signal 15

[Radu Popescu]

[root at xxx etc]# dovecot --version
1.1.3

[root at adi-ion etc]# dovecot -n
# 1.1.3: /usr/local/etc/dovecot.conf
log_path: /var/log/dovecot
protocols: imap imaps pop3 pop3s
ssl_cert_file: /etc/postfix/smtpd.cert
ssl_key_file: /etc/postfix/smtpd.key
disable_plaintext_auth: no
login_dir: /usr/local/var/run/dovecot/login
login_executable(default): /usr/local/libexec/dovecot/imap-login
login_executable(imap): /usr/local/libexec/dovecot/imap-login
login_executable(pop3): /usr/local/libexec/dovecot/pop3-login
mail_location: maildir:/home/vmail/%d/%n/
mail_debug: yes
mail_executable(default): /usr/local/libexec/dovecot/imap
mail_executable(imap): /usr/local/libexec/dovecot/imap
mail_executable(pop3): /usr/local/libexec/dovecot/pop3
mail_plugin_dir(default): /usr/local/lib/dovecot/imap
mail_plugin_dir(imap): /usr/local/lib/dovecot/imap
mail_plugin_dir(pop3): /usr/local/lib/dovecot/pop3
pop3_uidl_format(default): %08Xu%08Xv
pop3_uidl_format(imap): %08Xu%08Xv
pop3_uidl_format(pop3): %v.%u
auth default:
  mechanisms: plain login
  debug: yes
  debug_passwords: yes
  passdb:
    driver: sql
    args: /usr/local/etc/dovecot-sql.conf
  userdb:
    driver: sql
    args: /usr/local/etc/dovecot-sql.conf
  socket:
    type: listen
    master:
      path: /usr/local/var/run/dovecot/auth-master
      mode: 384
      user: vmail
      group: vmail

The log looks like this - it happens every few days:

dovecot: Sep 28 02:28:40 Warning: pop3-login: Killed with signal 15
dovecot: Sep 28 02:28:40 Warning: imap-login: Killed with signal 15
dovecot: Sep 28 02:28:40 Warning: pop3-login: Killed with signal 15
dovecot: Sep 28 02:28:40 Warning: auth(default): Killed with signal 15
dovecot: Sep 28 02:28:40 Warning: pop3-login: Killed with signal 15
dovecot: Sep 28 02:28:40 Warning: imap-login: Killed with signal 15
dovecot: Sep 28 02:28:40 Warning: Killed with signal 15
dovecot: Sep 28 02:28:40 Warning: imap-login: Killed with signal 15
dovecot: Sep 28 02:28:40 Warning: I/O leak: 0x407150 (24)
deliver(xxx at xxx.com): Sep 28 04:07:04 Error: Can't connect to auth
server at /usr/local/var/run/dovecot/auth-master: No such file or
directory
deliver(xxx at xxx.com): Sep 28 04:07:53 Error: Can't connect to auth
server at /usr/local/var/run/dovecot/auth-master: No such file or
directory
deliver(xxx at xxx.com): Sep 28 04:08:12 Error: Can't connect to auth
server at /usr/local/var/run/dovecot/auth-master: No such file or
directory
deliver(xxx at xxx.com): Sep 28 04:13:18 Error: Can't connect to auth
server at /usr/local/var/run/dovecot/auth-master: No such file or
directory
deliver(xxx at xxx.com): Sep 28 04:13:18 Error: Can't connect to auth
server at /usr/local/var/run/dovecot/auth-master: No such file or
directory

It's not a rpm installation, it compiled by me. The OS is a CentOS5.2.