0 Replies Latest reply on Oct 29, 2010 11:05 AM by Dalvir Sehmby

    Sessions not sticking using Apache httpd and Jboss AS

    Dalvir Sehmby Newbie

      Hi,

       

      I am working on implementing a load balancing/failover solution for our applications using Apache httpd (v 2.2.16) and Jboss 4.2.1. I have configured apache and jboss as described in the following link: http://community.jboss.org/wiki/UsingModproxyWithJBoss

       

      However, I can see that the application is not load balancing across 2 nodes. Please find httpd.conf cluster config is as follows:

       

      ...

       

      Include conf/extra/httpd-ssl.conf

      #

      # Note: The following must must be present to support

      #       starting without SSL on platforms with no /dev/random equivalent

      #       but a statically compiled-in mod_ssl.

      #

      #<IfModule ssl_module>

       

      SSLProxyEngine on

       

      SetEnv force-proxy-request-1.0 1

      SetEnv proxy-nokeepalive 1

       

      ProxyRequests Off

      <Proxy *>

        Order deny,allow

        Allow from all

      </Proxy>

       

      <Proxy balancer://my_cluster>

          BalancerMember https://myurl/JPBC route=node1

          BalancerMember https://myurl/JPBC route=node2

      </Proxy>

       

      ProxyPass /JPBC/ balancer://my_cluster/ stickysession=JSESSIONID|jsessionid nofailover=Off

      ProxyPassReverse /JPBC/ balancer://my_cluster/

       

      ...

       

      The reason I am using the same url in the proxy balancer is that it is being used as a redirect url which is sent back to the clients browser so the client can punchout with the correct url. If I use an ip:port then the client wont be able to access our punchout site.

       

      I have modified the server.xml on both Jboss nodes to include <Engine name="jboss.web" defaultHost="localhost" jvmRoute="node1"> for node 1 and <Engine name="jboss.web" defaultHost="localhost" jvmRoute="node2"> for node 2.

      I have also modified jboss-service.xml to include <attribute name="UseJK">true</attribute>

       

      The host file has the url mapped to both ip address on both nodes, node 1 is the first mapping so all requests go to node 1 hence why I dont see any load balancing.

       

      If I change node 2 hosts file so node 2 is the first mapping then requests do get redirected to node 2 but the application shows timeout errors and other problems occur due to the session not sticking to node 2. I can see that the JSESSIONID content value is changing from XXX.node1 to XXX.node2 and vice versa.

       

      I am not sure why sessions are not sticking using the jvmroute configuration. I would be grateful for any help in solving this problem.

       

      Thanks.