Problems with mod_proxy and Apache custom error responses

[Mark Meytin <mark@xxxxxxxxxx>]

Hello!  I was wondering if someone could help me with the following 
problem.  For I project I have been working on we were using Custom 
Error Responses as described here: 
http://httpd.apache.org/docs/2.2/custom-error.html  The custom errors 
were processed by Tomcat which was connected to Apache using mod_jk.  In 
order to pass some additional information to Java code, we used the 
following directive: JkEnvVar REDIRECT_URL "<UNSET>" in order to send 
the requested URL to the Java side.  In the Java code, the URL was 
retrieved using:

String redirect_url = (String) request.getAttribute("REDIRECT_URL");

The solution worked great until we switching to mod_proxy_ajp from 
mod_jk for Tomcat communication.  Since this was done, custom error page 
handling mechanism broke because getAtrribute() call above would always 
return null.  I tried multiple approaches, but so far I am not able to 
properly pass the value of REDIRECT_URL environment variable to the Java 
side.  Does anyone have any ideas on how to accomplish this?

Thanks in advance for any information!



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