Context forwarding requires contexts to be available on start of .war with filter

What steps will reproduce the problem?
1.Make a simple .war with only one dependency of urlrewritefilter; configure 
rules to forward between different contexts
2. Upload above one .war, with some other that the request is to be forwarded 
to, under Tomcat
3. Try to ask the server for a response

What is the expected output? What do you see instead?

The expectation is that the request is correctly forwarded to provided context 
and sample data correctly returned. It works sometimes but sometimes does not. 
The point is that the filter is validating it's rules against existing 
contexts. Unfortunately it may happen that these contexts are not yet being 
started. But, as far as I know, there is no possibility to guarantee the start 
order of contexts...

What version of the product are you using? On what operating system?
Tomcat 7, windows

Please provide any additional information below.
Maybe the validation can be postponed till first request ? or be configured to 
be disabled ?
Till now we have to redploy the .war file with filter after all contexts have 
been already started...

Original issue reported on code.google.com by michal.a...@schibsted.pl on 5 Dec 2013 at 1:17

griswold / urlrewritefilter

Context forwarding requires contexts to be available on start of .war with filter #153