[Dovecot] PAM authentication problems
Hi all! I`m using dovecot for a while with no problems. Some days ago it started to delay the authentication until the timeout.
syslog...
Oct 3 09:00:10 coan dovecot: auth(default): pam(rodrigo.botan,121.120.119.179): pipe() failed: Too many open files Oct 3 09:00:11 coan dovecot: auth(default): pam(katia,121.120.200.97): pipe() failed: Too many open files Oct 3 09:00:11 coan dovecot: auth(default): pam(andersoncampos,121.120.200.35): pipe() failed: Too many open files
Oct 3 08:25:55 coan dovecot: pop3-login: Disconnected: Inactivity: method=PLAIN, rip=121.120.119.39, lip=121.120.119.251 Oct 3 08:25:58 coan dovecot: pop3-login: Disconnected: Inactivity: method=PLAIN, rip=121.120.119.94, lip=121.120.119.251 Oct 3 08:26:01 coan dovecot: pop3-login: Disconnected: Inactivity: method=PLAIN, rip=121.120.119.148, lip=121.120.119.251
After the commands
/etc/init.d/dovecot stop killall -9 dovecot-auth /etc/init.d/dovecot start
It come back to work, then after some time, I need to restart again and again... I tried 'ulimit -n 5000' in /etc/init.d/dovecot, but the problem remains.
The problem is in the authentication backend, I guess. I`m using PAM, so I leaved only one line in /etc/pam.d/dovecot:
auth sufficient pam_permit.so
and all worked fine. Of course, just for test, since this allows login with any password.
My system: Debian Etch 64bit dovecot version: 1.0.rc15 (from etch repositories) PAM lib version: 0.79-5 (from etch repositories) The system has 200 users, with 30 logins per minute. hardware: Intel(R) Xeon(R) CPU 3050 @ 2.13GHz, 2GB RAM.
If you have some pointer to the solution, it will be welcome.
Thank you,
Tom Lobato
On Oct 4, 2008, at 10:27 AM, Tom Lobato wrote:
Oct 3 09:00:10 coan dovecot: auth(default): pam(rodrigo.botan,121.120.119.179): pipe() failed: Too many open files
Set this to non-zero:
# Number of auth requests to handle before destroying the process.
This may
# be useful if PAM plugins leak memory.
#auth_worker_max_request_count = 0
On Oct 5, 2008, at 12:37 AM, Timo Sirainen wrote:
On Oct 4, 2008, at 10:27 AM, Tom Lobato wrote:
Oct 3 09:00:10 coan dovecot: auth(default): pam(rodrigo.botan,121.120.119.179): pipe() failed: Too many open
filesSet this to non-zero:
# Number of auth requests to handle before destroying the process.
This may # be useful if PAM plugins leak memory. #auth_worker_max_request_count = 0
Oops, sorry, you're using v1.0.rc15 which doesn't have this setting.
In that case I don't really know why it's failing. Look at /proc/
pidof dovecot-auth/fd/. Where are all the file descriptors going?
In any case I'd suggest upgrading to a newer version (from
backports.org). That alone might fix the problem.
Timo Sirainen escreveu:
On Oct 5, 2008, at 12:37 AM, Timo Sirainen wrote:
On Oct 4, 2008, at 10:27 AM, Tom Lobato wrote:
Oct 3 09:00:10 coan dovecot: auth(default): pam(rodrigo.botan,121.120.119.179): pipe() failed: Too many open files Set this to non-zero:
# Number of auth requests to handle before destroying the process. This may # be useful if PAM plugins leak memory. #auth_worker_max_request_count = 0 Oops, sorry, you're using v1.0.rc15 which doesn't have this setting. In that case I don't really know why it's failing. Look at /proc/
pidof dovecot-auth/fd/. Where are all the file descriptors going?In any case I'd suggest upgrading to a newer version (from backports.org). That alone might fix the problem.
great! I upgraded dovecot (with backports.org package) and now it works. I don`t know why it started to give such problems but the upgrade solved it. thank you very much, Timo!
Tom Lobato
participants (2)
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Timo Sirainen
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Tom Lobato