Hello, On Wed, Aug 29, 2007 at 10:06:41AM +0800, Joshua, C.S. Chen wrote: > My institute's mail server was upgraded to RHEL5 with dovecot 1.0-2.1rc5 > recently. And it uses PAM authentication which points to LDAP server. > Now from time to time it gets Error like > > dovecot: Aug 29 09:23:59 Error: auth(default): > pam(joshua,192.168.177.52): pipe() failed: Too many open files
This looks similar to [221572]. We don't know what was causing that though. I can imagine that even [154314] may be causing that (which is hopefully getting fixed in RHEL 5.2). [221572] https://bugzilla.redhat.com/show_bug.cgi?id=221572 [154314] https://bugzilla.redhat.com/show_bug.cgi?id=154314 > passdb: > driver: pam > userdb: > driver: passwd Please, try to use userdb ldap in dovecot.conf. That way you don't use nss_ldap, which is buggy. -- Tomas Janousek, SW Engineer, Red Hat, Inc.