Cannot use a full URL

Today I noticed the following lines in the Apache error_log file:

[notice] cannot use a full URL in a 401 ErrorDocument directive --- ignoring!

Of course, we do not like to waste the error_log file so I tried to find a solution to the problem.

In the present case, the problem was caused by the ErrorDocument file that was provided in the document_root directory for the domain name, as follows:

ErrorDocument 401 http://domain.tld/errorpage.html

This row had to be modified as follows:

Debugging 500 Internal Server error

Try the following command:

REDIRECT_STATUS=200 REQUEST_METHOD=GET SCRIPT_FILENAME=/home/richardbuz.de/index.php SCRIPT_NAME=/index.php PATH_INFO=/ SERVER_NAME=richardbuz.de SERVER_PROTOCOL=HTTP/1.1 REQUEST_URI=/ HTTP_HOST=richardbuz.de strace -s1024 /bin/php-cgi

Please replace these varaible for your own: