Win a copy of Head First Android this week in the Android forum!
  • Post Reply Bookmark Topic Watch Topic
  • New Topic
programming forums Java Mobile Certification Databases Caching Books Engineering Micro Controllers OS Languages Paradigms IDEs Build Tools Frameworks Application Servers Open Source This Site Careers Other Pie Elite all forums
this forum made possible by our volunteer staff, including ...
Marshals:
  • Tim Cooke
  • Campbell Ritchie
  • Paul Clapham
  • Ron McLeod
  • Liutauras Vilda
Sheriffs:
  • Jeanne Boyarsky
  • Rob Spoor
  • Bear Bibeault
Saloon Keepers:
  • Jesse Silverman
  • Tim Moores
  • Stephan van Hulst
  • Tim Holloway
  • Carey Brown
Bartenders:
  • Piet Souris
  • Al Hobbs
  • salvin francis

Problem with session stickyness on weblogic 9.2.3 with apache 2211 proxy plugin

 
Greenhorn
Posts: 26
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
I am new to this combination Apache with Weblogic. We have a situation as given below.

We are using the following configuration in the load balancer setup.

- Weblogic 9.2.3 with a cluster having two servers - The cluster node and both the servers are running on the same machine.
- Apache 2.2.1.1 server with the proxy plugin for weblogic on another machine.
- We are using HttpSession based session tracking in the application.
- We are not you using cookies or url parameters to maintain the session id in the application.

Setup Example:
We have Machine A - D,
Machine A is having Apache and Weblogic Admin
Machine B,C,D - having Weblogic Cluster Nodes for Application

Apache is balancing the cluster.

Problem
We are facing a problem with the session stickyness - Sometimes we see that the apache server redirects the user to the server which was NOT initially serving the user request... and hence the user gets kicked out from the initial session.

Our Restrictions
We can not use any type of session replication since the architecture of the application doesn't support it (Objects that we keep in session are not Serializable) . We need a round robin load balancing to balance the load on the servers to have a better performance. However, once a client establishes a session between a given server we need the same server to serve the client. The plugin should NOT switch the client to the other server.

For your reference - httpd.conf file is as below(in case if needed):



 
Bartender
Posts: 6663
5
MyEclipse IDE Firefox Browser Linux
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
Here is what I understand.

1. You are using the web server to load balance between nodes.

2. Objects in the session are not serializable.

This presents a problem. Firstly, I would point to a cluster URL specified by weblogic, to perform the load balancing. This is because WL can create and maintain cluster aware stubs that can balance between nodes based on an algorithm that WL chooses. WL will also have the knowledge about session affinity which apache will not have.

Secondly, I doubt if clustering is achievable if your session objects are not serializable. Objects need to be serialized, and synchronized across nodes when they are clustered. If they cannot be replicated by serialization, how will clustering work ?
reply
    Bookmark Topic Watch Topic
  • New Topic