Threading in Unix environment

I have developed an application based on struts that runs on 9IAS on a sun unix server connecting to an Oracle 9i database. For development purposes I simulated the application on a windows box using Oracle's OC4J standalone. The problem that I am having is that under a load 40 - 50 concurrent users, the connection to the database is dropping. The application runs great front to back normally.
I am storing some configuration paramaters in application state (Servlet context) upon loading of the application ( using a struts plugin) and then retrieving the parameters to do some queries on the DB. In my windows testing environment the application works great under a load. But on the Unix box it buckles. The only thing that I can think of is that the Unix box is starting new seperate instances of the servlet context that does not have the parameters stored in application state. In other words it is not calling the plugin.
Can anyone give me a point in the right direction as to where my problem might be coming from? Does Unix create new instances of the servlet context and run threads through them under a load?

Randy,
Pardon me for stating the obvious, but Oracle 9iAS is not the same as OC4J stand-alone. Have you tried running the application on UNIX using only OC4J stand-alone (as you have done on Windows)? You may find that OC4J (and your app) perform the same on both platforms (Windows and UNIX).
For your information, I think the Oracle Application Server - General and OC4J forums are probably more appropriate for your question.
Good Luck,
Avi.

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