“Internal error: pcfg_openfile() called with NULL filename”

This is caused by auth_basic and stops the authentication and authorisation process. Adding the following directive to your auth_pgsql or auth_ldap config file solves the problem:

“AuthBasicAuthoritative Off”
It disables basic authorisation being authoritive for the authorisation process. The errors will still be visible in your logfiles, but the authorisation scheme works as normal.

Other tags:

• Apache 2.2 error
• Apache 2.2 subversion 1.4.4 error
• mod_pgsql pcfg_openfile errors

http://gforge.org/forum/message.php?msg_id=10926&group_id=128

Solution:

But only this time: the debian-apache2 team linked apache2 against both libdb4.3 and libdb4.4. I rely heavily on the apache2 module “dav_svn”, which uses apache2′s preferred libdb.

After four hours of reinstalling and debugging with the help of Peter Samuelsen, he found this issue and reported it to the debian-apache2 team.

The updated subversion debian package is at: http://free.linux.hp.com/~troyhebe/subversion-1.4.0-5/libsvn1_1.4.0-5_i386.deb