Fedora Users — OpenLDAP and file limits

Ok, I am having one really big problem with using FC1 as a server in one particular circumstance. Every week or so, LDAP hits 'Too many open files' and stops functioning properly. Additionally, I've discovered that the various LDAP clients don't then fail over to my backup LDAP server like they're supposed to. They don't even fail all at once, but things just slowly stop working one by one until everything else grinds to a halt.

I've seen other people with similar problems, but no useful solutions being offered. My old Redhat7.1 server never had this problem running openldap 2.0.11.

Jan 11 04:38:09 urd slapd[1452]: warning: cannot open /etc/hosts.allow: Too many open files Jan 11 04:38:47 urd last message repeated 18 times Jan 11 04:39:52 urd last message repeated 7 times Jan 11 04:42:55 urd last message repeated 24 times Jan 11 04:45:36 urd last message repeated 2 times Jan 11 04:50:37 urd last message repeated 8 times Jan 11 05:12:17 urd last message repeated 3 times Jan 11 05:13:58 urd last message repeated 7 times Jan 11 05:33:57 urd last message repeated 2 times Jan 11 05:35:38 urd last message repeated 4 times Jan 11 05:40:46 urd last message repeated 14 times [...] Jan 16 09:43:00 urd slapd[3021]: warning: cannot open /etc/hosts.allow: Too many open files Jan 16 09:43:38 urd last message repeated 9 times Jan 16 09:44:45 urd last message repeated 11 times Jan 16 09:45:01 urd last message repeated 14 times

I've tried adding the following to /etc/security/limits.conf, but it hasn't helped: ldap hard nofile 65535

It looks like I'd need to have ldap run 'ulimit -n 65535' before starting slapd from either within the daemon function of /etc/init.d/functions or some wrapper script, but I'm a little baffled as to why this behavior never showed up on my older system which has AFAIK the same per-process user limits.

Does anyone have any insight or helpful suggestions (other than putting together a PO for a few RHEL licenses)?