Resolution: Won't Fix
Affects Version/s: 3.1.0.M1, 3.0.4
Fix Version/s: 3.1.0.RC1
The ChannelProcessingFilter is great if you use the same subdomain for http and https traffic, but if you are a site like facebook (https://login.facebook.com/) where you use a different subdomain for https traffic then you can't take advantage of the filter.
The current situation I am trying to use it in is http://www.domain.com:8080/ and https://secure.domain.com:8443/
As you can see, the channel filter won't work because it will redirect https://secure.domain.com:8443/ to http://secure.domain.com:8080/ which is not a valid url.
Have a server-name-mappings tag for mapping http subdomains to https subdomains.
<port-mapping http="8080" https="8443"/>
<sever-name-mapping http="www.domain.com" https="secure.domain.com"/>