Account mix problem

[nihongbin]

In the application, the customers sometimes get a problem when they test.
Sometimes after they login, they saw some other accounts’ information on the main page. But on local, when we test, we never get like this.
I tried to use some stress test softwares to run the login part in a loop and I login with the other account by manually. I took halfday to test like this way and never saw the mix accout problem.
Now, I have no idea.

System:
Local: windows 2000
Customer: linux

Server: tomcat 5.0.28
Technology: tapestry 4.0.2
hivemind, spring, hibernate

Are there somebody can give me some ideas to deal with this problem?
I can try, thx !

[Eranga]

I think there is nothing to deal with stress testings here. This is something wrong with the way of programming. You should specifically explain your question, like what technology you use and so on.

[nihongbin]

Eranga, Thank u for ur response.

On customer side, a lot of people test the application just like alpha test. I just want to simulate it by the stress test software.
First, I guess the problem is the object pool.
In the application, I use the tapestry-4.0.2 and the version seems too old, but even if the problem is this, I don’t know how to prove and fix it.
Or, some other problems……?

[Eranga]

Basically you want to work on one customer at a time, right?

By the way, is this related to Java? Can you specifically explain your question.