Contact who ever is maintaining the DNS server in your company and ask them to add an alias for sub.domain2.com pointing to the same IP address as sub.domain1.com.
Obviously as the error says you have DNS problem. Apache can not resolve sub.domain2.com into IP address. Contact who ever is maintaining the DNS server in your company and ask them to add an alias for sub.domain2.com pointing to the same IP address as sub.domain1.com.
IgorOn Tue, May 4, 2010 at 5:56 AM, Richard van der Walt <richard.vdwalt@xxxxxxxxxxxxxx> wrote:
Good day there.
I'm using mod_proxy to redirect trafic to java applications running on
JBoss instances. I have 3 JBoss instances running seperate apps, the
redirects of 2 of these works fine with mod_proxy configuration but
the third doesn't.
The first 2 instances where set up a long time ago. I've used the one
instance's configuration file for the third one as it was close to
what I required. Here's the 2 configurations.
Working:
<VirtualHost *:80>
ServerAdmin developers@xxxxxxxxxxx
ServerName sub.domain1.com
ProxyRequests Off
ProxyPreserveHost On
ProxyPass / http://sub.domain1.com:18080/
ProxyPass /media !
ProxyPassReverse / http://sub.domain1.com:18080/
ErrorLog /var/log/apache2/domain1-error_log
CustomLog /var/log/apache2/domain1-access_log combined
<Directory "/srv/www/vhosts/domain1">
Options Indexes FollowSymLinks
AllowOverride None
Order allow,deny
Allow from all
</Directory>
</VirtualHost>
The one not working:
<VirtualHost *:80>
ServerAdmin developers@xxxxxxxxxxx
ServerName sub.domain2.com
ProxyRequests Off
ProxyPreserveHost On
ProxyPass / http://sub.domain2.com:28080/
#ProxyPass /media !
ProxyPassReverse / http://sub.domain2.com:28080/
ErrorLog /var/log/apache2/domain2-error_log
CustomLog /var/log/apache2/domain2-access_log combined
<Directory "/srv/www/vhosts/domain2">
Options Indexes FollowSymLinks
AllowOverride None
Order allow,deny
Allow from all
</Directory>
</VirtualHost>
The one that's not working I can browse to
http://sub.domain2.com:28080 without a problem but when I try to
navigate to http://sub.domain2.com I get the following error
irrespective of whether the server it's redirecting to is started or
not.
"
Proxy Error
The proxy server received an invalid response from an upstream server.
The proxy server could not handle the request GET /.
Reason: DNS lookup failure for: sub.domain2.com
Additionally, a 502 Bad Gateway error was encountered while trying to
use an ErrorDocument to handle the request.
"
I'm running on a SuSE and Apache 2.2.4 environment.
Mod_Proxy is loading properly as is evident by the already working
instances. I'm either missing the mistake in the vhost directive or
forgot about a configuration in another file.
Regards
--
Richard van der Walt
Product Development
Stracienta SA (Pty) Ltd.
E-mail: richard.vdwalt@xxxxxxxxxxxxxx
E-mail legal disclaimer: http://www.stracienta.com/disclaimer.html
www.stracienta.com
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