too many open files

Hello list,

Although the subject suggests a fairly know issue, i cannot seem to understand the cause.

Log file presents

Apr 22 12:57:36 proxyldap1 slapd[1511]: warning: cannot open /etc/hosts.allow: Too many open files Apr 22 12:57:36 proxyldap1 slapd[1511]: warning: cannot open /etc/hosts.deny: Too many open files

, but

proxyldap1:~# cat /proc/sys/fs/file-max 100000 proxyldap1:~# cat /proc/sys/fs/file-nr 1088 0 100000 proxyldap1:~# lsof -p `pidof slapd`| wc -l 460 proxyldap1:~# su -c "ulimit -n" openldap 8192

slapd is version 2.4.17-2 (Debian Unstable) and is running on a xen vm, using 64bit kernel 2.6.26-2-xen-amd64 in a Debian Lenny system.

Have i overlooked any aspect?

Thank you in advance,

Hugo Monteiro.