Dear list,
I have questions about content of the following error messages.
------ dovecot-auth: PAM unable todlopen(/lib/security/pam_nologin.so) dovecot-auth: PAM [error:/lib/security/pam_nologin.so: cannot open shared object file: Too many open files] dovecot-auth: PAM adding faulty module:/lib/security/pam_nologin.so dovecot-auth: PAM _pam_load_conf_file: unable to open /etc/pam.d/system-auth dovecot-auth: PAM unable to dlopen(<*unknown module path*>) dovecot-auth: PAM [error: *unknown module path*>: cannot open shared object file: Too many open files] dovecot-auth: PAM adding faulty module: <*unknown module path*> dovecot-auth: PAM _pam_load_conf_file: unable to open /etc/pam.d/system-auth dovecot-auth: PAM _pam_load_conf_file: unable to open /etc/pam.d/system-auth dovecot-auth: PAM unable to dlopen(/lib/security/pam_deny.so) dovecot-auth: PAM [error:/lib/security/pam_deny.so: cannot open shared object file: Too many open files] dovecot-auth: PAM adding faulty module:/lib/security/pam_deny.so
------
dovecot: auth(default): pam(xxx@xxx.com,127.0.0.1): pipe() failed: Too many open files dovecot: auth(default): pam(xxx@xxx.com,127.0.0.1): pipe() failed: Too many open files
It seems that this is due to that there are files existed to open beyond its limitation.
Other information that could be relevant are as follows.
# ulimit -n
1024
# cat /proc/cat /var/run/dovecot/master.pid/limits
cat: /proc/7273/limits: No such file or directory
# lsof -p cat /var/run/dovecot/master.pid | wc -l
29
# ls /proc/pidof dovecot-auth/fd | wc -l
1024
From the above result, dovecot-auth proccess opened 10243 files, and that seems to be the limit. So I expect that adding following lines into /etc/init.d/dovecot could be fix this issue.
# vi /etc/init.d/dovecot
. /etc/init.d/functions
ulimit -n 4098 <-add test -x /usr/sbin/dovecot || exit 0 <-add
if [ -f /etc/sysconfig/dovecot ]; then . /etc/sysconfig/dovecot fi
Is my understanding right? Even if so, how could I verify what files are opened by dovecot-auth?
I would very much appreciate it if someone in this list could provide comments/suggestions.
Sincerely,