SVN error 500 - possibly active directory related

Hello all, let me start by saying I'm basically fairly clueless about
SVN. Someone else at my company maintains all the Linux servers and
he is unavailable. I'm OK with Linux but resort to googling a lot.
I'm on the windows side of the shop and last night we took the old
domain controller permanently offline. We have a new DC in the same
domain but with a new IP address. Note that the old DC was SBS2003,
the new is Win2K8R2 (again, same domain, I added Win2K8R2 to the
domain, moved all roles off SBS, then demoted SBS and took it offline)

I got a complaint today that people could no longer log into SVN and
as it turns out, it was integrated into AD. I googled a bunch, found
this config file:

/home/svn/apache_files/conf/auth.conf which contained these line
(edited to remove identifying info)

 AuthType Basic
                AuthzLDAPAuthoritative off
                AuthLDAPURL
"ldap://sbs.domain.local:389/DC=domain,DC=local?sAMAccountName?sub?(objectCategory=person)"
                AuthLDAPBindDN "ldapreader_at_domain.local"
                AuthLDAPBindPassword xxxxxxxxxxxxxx

I changed the AuthLDAPURL to point to the new server (and pinged it to
make sure it resolved and was reachable)

Then I tested logging in. When I enter a bad password, error.log shows:

[Sun Nov 13 15:33:43 2011] [error] [client 192.168.3.107] user robr:
authentication failure for "/": Password Mismatch

When I enter a good password nothing shows up in error.log, instead in
access.log I see:
192.168.2.130 - robr [13/Nov/2011:16:42:52 -0500] "GET / HTTP/1.1" 500
772 "-" "Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; WOW64;
Trident/5.0)"

and the browser shows:
Internal Server Error
The server encountered an internal error or misconfiguration and was
unable to complete your request.

Please contact the server administrator, [no address given] and inform
them of the time the error occurred, and anything you might have done
that may have caused the error.

More information about this error may be available in the server error log.

I don't see any login failure messages in the event log on the domain
controller. What can I do next to troubleshoot this issue?

Thanks much!!
Received on 2011-11-13 22:45:48 CET