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From rjowens <rjow...@us.ibm.com>
Subject Apache Http Server Load Balancing and Failover
Date Tue, 27 Jul 2010 22:14:58 GMT

I have Apache Http Server v2.2.3 configured as a reverse proxy with load
balancing to a WADI clustered application on Geronimo 2.1.5.  Load balancing
and failover works fine if one of the Geronimo instances fail.  However, if
only the application fails or is stopped I get a 404 error and failover does
not work? 

Here’s the LB config:

<IfModule mod_proxy_balancer.c>
     <Proxy balancer://wadicluster>
           Order deny,allow 
           Allow from all 
         BalancerMember ajp://localhost:8209/NodeDetection loadfactor=50
route=node1 
         BalancerMember ajp://localhost:8409/NodeDetection loadfactor=50
route=node2 
     </Proxy> 
     ProxyPass /NodeDetect balancer://wadicluster  stickysession=JSESSIONID
		
     ProxyPassReverse /NodeDetect ajp://localhost:8209/NodeDetect
     ProxyPassReverse /NodeDetect ajp://localhost:8409/NodeDetect

    <Location /balancer-manager>
         SetHandler balancer-manager
         Order Deny,Allow
         Allow from all			
    </Location> 

</IfModule>		

I need to make this work with an application failure as well as a server
failure.  Any ideas?  Thanks.

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