On Wed, May 13, 2009 at 10:36 AM, Jack Cai <greensight@gmail.com> wrote:
Tomcat native clustering and WADI are two different approaches.

To try out Tomcat native clustering, for example, please refer to this doc [1]. It clearly points
out that you need to set the "jvmRoute" parameter (note ID) in the config.xml.

Good luck!


[1] http://cwiki.apache.org/GMOxDOC22/tomcat-native-clustering.html

2009/5/13 Dennis Cartier <dennis.cartier@gmail.com>

On Tue, May 12, 2009 at 10:19 PM, viola lu <viola.lu@gmail.com> wrote:
First, pls set up tomcat or wadi cluster following this link: http://cwiki.apache.org/GMOxDOC22/clustering-and-farming.html
and then configure apache http server to realize session affinity, if you use mod_jk way: edit works.properties under $http server install dir/conf with
if you use mod_proxy, you can edit httpd.conf with:
ProxyPass / balancer://mycluster/ stickysession=JSESSIONID


On Wed, May 13, 2009 at 9:10 AM, Dennis Cartier <dennis.cartier@gmail.com> wrote:
I am trying to find out how to configure G2.1.4 for session affinity when using Tomcat and WADI. Would anyone be able to point me in the right direction?

I thought that ClusterNodeName looked like a good guess in the config-substitutions.properties file but that does not seem to attach a node name to the generated session.

Any help would be appreciated.



Thanks for the pointers Viola. I am fine with the clustering aspects as far as Apache goes, I am just having trouble getting the node name to be properly appended to the generated JSESSIONID.

I changed to the target namespace as indicated in the G2.2 cluster docs (<web-app xmlns="http://geronimo.apache.org/xml/ns/j2ee/web/tomcat-2.0.1">) and I already had my WAR marked distributable as well as having the <tomcat-clustering-wadi /> element in place.

Unfortunately I still do not get a node name being appended to the generated session so no affinity results.

I noticed the G2.2 docs had a section on switching WADI to unicast. This sounded optional, I assume the default multicast mode of WADI is functional and changing to unicast is not required?

I remain stumped. With no session affinity my requests are still spraying across the entire cluster rather then being sticky to a single node.


Hmmm, I am getting the feeling that stick sessions (session affinity) is not possible in WADI clustering? I am not really wanting to switch to Tomcat native clustering at this point. Does anyone know if WADI (as implemented in G2.1.4) supports sticky sessions?