How to debug Apache mod_rewrite

Question

I have two main problems with mod_rewrite:

1) There is no meaningful error reported when I have an invalid rule

Answer 1

The LogRewrite directive as mentioned by Ben is not available anymore in Apache 2.4. You need to use the LogLevel directive instead. E.g.

LogLevel alert rewrite:trace6

See http://httpd.apache.org/docs/2.4/mod/mod_rewrite.html#logging