Help with J2EE SDK 1.4 Virtual Servers please!

Question

H!
Are we doomed to have just one virtual server pointing to port 80??
I have a Win2K computer with J2EE App Server 1.4. In this computer I stopped the IIS 5.0 in order to use the HTTP Server included with the product. I also run the DNS on the same machine with 3 domains. All name resolutions for these 3 domains work fine.
Now I want to enter to any of the 3 domains freely and execute JSP apps. But I don't want to enter ports numbers like this:
http://www.mytest.com:8081/hello.jsp
I just want to enter:
http://www.mytest.com/hello.jsp
So I defined a new http-port listener pointing to the 80 port on this server. With no SSL support.
Name: http-port80
IP Address: 0.0.0.0
POrt: : 80
Then I defined a new virtual server using the http-port listener. I set the following fields:
ID: mytest
Hosts: www.mytest.com
HTTP Listener: http-port80 (This is the name of the port listener)
Everything seems to be fine. I can enter http://www.mytest.com and call the hello.jsp it's ok.
But then I create a new virtual server for http://www.mytest2.com exactly as the one for the www.mytest.com, except for the host field: http://www.mytest2.com
Then when I restart the app server I got the message on the log: "Port already in use".
I don't want to enter http://www.mytest2.com:<port> but I've read that you cannot assign the same http-listener to 2 virtual servers, so I created another listener pointing to the same port 80. But I still have the same error.
Any ideas how to handle this?
Am I doing something wrong on the configuration?
Thank you very much!!

Answer 1

I can help you out with this, because I just solved this problem using the Apache web server 2.0 with mod_proxy and mod_proxy_http.
this is how the configuration works.
setup sunone creating one virtual host for each http-listener on a different port. and make sure these ports are any port except the 80. -- we will configure apache on this port and then use it as a reverse proxy to get to our hosts.
like this
virtual-listener-1 - port 8081
virtual-listener-2 - port 8082
virtual-listener-3 - port 8083
virtual-host-1: www1.domain.com bind to: virtual-listener-1
virtual-host-2: www2.domain.com bind to: virtual-listener-2
virtual-host-3: www3.domain.com bind to: virtual-listener-3
now download apache with all the modules http://www.apache.org
in your httpd.conf add the following lines of code.
#the code below will tell apache to enable the proxy for your host
<IfModule mod_proxy.c>
# Proxy Server directives. Uncomment the following lines to
# enable the proxy server:
ProxyRequests On
<Proxy *>
Order deny,allow
Deny from all
Allow from www1.domain.com
Allow from www2.domain.com
Allow from www3.domain.com
</Proxy>
# Enable/disable the handling of HTTP/1.1 "Via:" headers.
# ("Full" adds the server version; "Block" removes all outgoing Via: headers)
# Set to one of: Off | On | Full | Block
ProxyVia On
# End of proxy directives.
</IfModule>
NameVirtualHost *:80
<VirtualHost *:80>
ServerName www1.domain.com
<Location />
Order allow,deny
Allow from all
ProxyPass http://sunoneserver:8081/
</Location>
</VirtualHost>
<VirtualHost *:80>
ServerName www2.domain.com
<Location />
Order allow,deny
Allow from all
ProxyPass http://sunoneserver:8082/
</Location>
</VirtualHost>
<VirtualHost *:80>
ServerName www3.domain.com
<Location />
Order allow,deny
Allow from all
ProxyPass http://sunoneserver:8083/
</Location>
</VirtualHost>
note the sunone server indicates the server where you installed sunone-as (J2EE 1.4). this will give you the result you are looking for: all three of these sites will run on port 80 and each of them will respond to a different web application on sunone.
there are naturally limits because when you run out of ports on your application server this won't work any more but then again there are about 60000 of those free and i don't think you will be able to run that many sites on one server anyway.
Chris.