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From Dennis Cartier <dennis.cart...@gmail.com>
Subject Re: Enabling Session Affinity in G2.1.4 (using Tomcat w/ WADI)
Date Wed, 13 May 2009 18:33:12 GMT
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!
>
> -Jack
>
> [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
>>>     worker.loadbalancer.sticky_session=1
>>> if you use mod_proxy, you can edit httpd.conf with:
>>> ProxyPass / balancer://mycluster/ stickysession=JSESSIONID
>>>
>>> Viola
>>>
>>>
>>>
>>> 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.
>>>>
>>>> Dennis
>>>>
>>>
>>>
>>>
>>> --
>>> viola
>>>
>>
>> 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.
>>
>> Dennis
>>
>
>
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?

Dennis

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