Redirect subdirectory to another virtualhost on Apache??

[Derrick Lin <klin938@xxxxxxxxx>]

Hey guys,

I have been trying to do the Apache redirect with no luck so far.

I have one webapp running as a subdirectory of a virtualhost as http://old.example.com/app_test. Recently we have setup a new DNS for this webapp called app_prod.example.com.

We then setup another virtualhost points to this new DNS and the webapp (via proxy). It's working fine.

But we also need to redirect the old URL to the new one for some old users. What I did was, in the old.example.com virtualhost block, I put:

Redirect permanent /app_test http://app_prod.example.com

But it gave 500 internal server error. I checked the error log, the generated error is:

[Mon Oct 29 15:17:11 2012] [warn] proxy: No protocol handler was valid for the URL /galaxy_qa. If you are using a DSO version of mod_proxy, make sure the proxy submodules are included in the configuration using LoadModule.

I am using Apache 2.2.16 on ubuntu 10.10 server.

Any suggestion?

Cheers,

Derrick