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I have an application running on tomcat at http://www.example.com:9090/mycontext. The host name in server.xml points to www.example.com. I do not have localhost anymore. I am using apache to forward requests to tomcat using mod_proxy. Things work fine as long as the ProxyPath is /mycontext. The server name setup in virtual host is www.abc.com and http://www.abc.com/mycontext works fine. However I would like to ignore the context path and simply use http://www.abc.com/ to forward requests to http://www.example.com:9090/mycontext. When I do this, apache shows me a blank page. What am I missing here? I have not changed anything in server.xml except the default host to www.example.com.

<VirtualHost *:80>
 ServerName www.abc.com

 ProxyRequests Off
 ProxyPreserveHost On

 <Proxy *>
 Order deny,allow
 Allow from all

 ProxyPass / http://www.example.com:9090/mycontext
 ProxyPassReverse / http://www.example.com:9090/mycontext


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Can you add the relevant bits of your httpd.conf file to the question? –  meulop Apr 13 '12 at 10:06
I have added the virtual host settings. Is there anything else I should add? –  user10211 Apr 13 '12 at 10:39
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1 Answer

Matching trailing slashes are important in mod_proxy.

ProxyPass / http://www.example.com:9090/mycontext

This will take a request to http://www.abc.com/something and proxy it to http://www.example.com:9090/mycontextsomething - not terribly helpful!

Try this configuration, instead:

ProxyPass / http://www.example.com:9090/mycontext/
ProxyPassReverse / http://www.example.com:9090/mycontext/

Also - if Tomcat's expecting www.example.com as a host header, then you probably do not want that ProxyPreserveHost On directive.

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Thanks a lot for your help. The solution partially worked. With the trailing slash added, a page should be shown when http ://www.abc.com/ is requested which corresponds to http ://www.example.com:9090/mycontext/. Instead it goes to the "It works" page. For other URLs such as http ://www.abc.com/test it does take me to http ://www.example.com:9090/mycontext/test. How do I solve the first bit? –  user10211 Apr 14 '12 at 10:13
Is it Apache's "It works" page, or Tomcat's? –  Shane Madden Apr 14 '12 at 18:40
It is Apache's "It works page." –  user10211 Apr 15 '12 at 4:44
Interesting... are you sure the request to / has the correct host header to get mapped to this virtual host? –  Shane Madden Apr 16 '12 at 1:49
I checked the apache access log. It shows that a request made to / gets directed to /mycontext/. Should it explicitly show example.com:9090/mycontext –  user10211 Apr 16 '12 at 12:36
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