I've got a SLES10sp4 OES2sp3 server running apache with LDAP authentication. The server works as its supposed to, but at some point a service stops working (something dies) and then the authentication doesn't work anymore. You still get the login box but when you enter your credentials and submit it thinks for a second and then pops up a blank login box again. The only thing I can do to get it to work again is reboot the server. It works for a while then craps out again.

Anyone know what might be causing this, or what services i can restart to fix the issue w/o having to reboot?