After upgrading to RHEL5 server, I had some problems where ldap would work for a while and then stop. Using this command:
ldapsearch -x -ZZ -d4
I found that it didn’t like my self-signed certificate. I have used these in the past for all sorts of things, but now, it was causing a problem. The solution was to edit the file /etc/openldap/slapd.conf and comment out the TLSCACertificateFile line.
UPDATE
I changed the group on the bundle-ca.crt file and put it back in the slapd.conf file. Things seem to work. I don’t know why this was a problem the other day.