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Strange Problem with Sessions

Gaurav Chikara
Ranch Hand

Joined: Jun 09, 2000
Posts: 412
I m putting a vector in a session on my first page which is a dynamic html generated by the output of a servlet
like this
HttpSessiom session = req.getSession(true);
where Vector is declared at class level in this way
Vector obj = new Vector();
If i try to retrive the vectors value in my second page by this way
HttpSession ses = req.getSession(true);
Vector obj = (Vector)ses.getValue("MyVector");
when i run my application first time it retrives the value of obj in second application as null but when i refresh the browser and again call the second application from first then it runs perfectly fine
Can anyone suggest where I m going wrong?
any views ?

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Randall Twede
Ranch Hand

Joined: Oct 21, 2000
Posts: 4351

I dont know if this will help but try

from what I understand, the way you did it will only create a new session if one doesnt exist. So shouldnt be a problem, but its worth a try I suppose.
I did the same thing using ArrayList and had no problem. I hope you find solution.
[This message has been edited by Randall Twede (edited February 27, 2001).]

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Peter den Haan
Ranch Hand

Joined: Apr 20, 2000
Posts: 3252
I'm willing to bet that you're running into browser caching. If you're using IE, try Internet Options -> Temporary Internet Files Settings -> Every visit to the page. If that works, add headers to your response to disable caching.
- Peter
I agree. Here's the link:
subject: Strange Problem with Sessions
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