[Dovecot] Too many open files

[Timo Sirainen]

On Tue, 2008-01-08 at 09:42 -0600, Harrison Metzger wrote:
> Hello,
> 
> I have dovecot installed and it works for about 3 hours then I get this
> error (in /var/log/maillog):
> 
> Jan  8 08:42:53 stu dovecot: auth(default): pam(grossmsm,69.131.100.47):
> pipe() failed: Too many open files
> 
> I set pam_limits.so to allow the user 'dovecot' to have 8192 open files, and
> I also changed:

dovecot-auth isn't (or shouldn't!) be running as "dovecot" user. See
http://wiki.dovecot.org/UserIds. Also I don't think pam_limits settings
matter for dovecot-auth, since it's started by dovecot master which was
started as root, and PAM is never called in the middle. So the only
thing that affects number of fds is "ulimit -n" value before dovecot was
started.

What Dovecot version are you using? How many dovecot-auth processes do
you have running after a while?

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