"descriptor table size" errors?

["Gregory K. Ruiz-Ade" <gkra@cs.ucsd.edu>]

We seem to be getting errors every night a couple minutes after  
logrotate rotates our logs and sends a SIGHUP to syslog-ng (to force  
a reload):

Jul 11 04:02:46 csenet slapd[8823]: daemon: 1024 beyond descriptor  
table size 1024

Nothing is touching our slapd process (i.e., same process over  
several days.)

This seems only to happen on our master LDAP server.  We're using  
slurpd for replication to our two slave servers.

This morning, something apparently corrupted our directory, which  
apparently got replicated to our slaves; we restored the db from the  
nightly dump (made from slapcat on another replica) and LDAP seems  
happy again.

We can't see anything in the logs that would lend a clue as to what  
might be going on.  Any suggestions as to where I should start looking?

We're running RHEL 4 with all updates applied, using RH's openldap  
packages (2.2.13).

Looking back in the logs, it seems that the syslog message above  
occurs for a couple minutes after syslog-ng is restarted, and then  
stops occurring until the next time syslog-ng is restarted, but it's  
apparently been happening for quite a while.  Today is the first time  
we've had corruption (or otherwise total failure) of the LDAP  
directory, though.

Any suggestions or help will be greatly appreciated.

Gregory

--
Gregory K. Ruiz-Ade
Sr. Systems Administrator
Computer Science and Engineering
University of California, San Diego
Office: EBU3b 1216
Phone:  (858) 822-2625
E-mail: gkra@cs.ucsd.edu