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Session Expiring Time?

 
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Hi guyz,
I am trying to allow user to set his Session time.After that time Session must expires.I am writing the pseudocode here:
1: Get the user defined time in sessionTime
2: mySession.setMaxInactiveInterval(sessionTime)
3: if(mySession==null)
out.println("Session Expired")
esle
out.println("Session Active")
Explanation:-
Step 1 is done is a 1st Servlet
Step 2 is done in a 2nd Servlet
Step 3 is done in a 3rd Servlet

A/C to me the above logic is clear.But when I run Servlet, I give i/p 1.That is 1 seconds Session time, But Session is active after 1 second and expires beore 1 minute.Why not it expires right after 1 second?.
Bye,
Viki.
 
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It seems that I read somewhere that when the time limit is reached the server will have to opportunity to invalidate the session but may not do it right away.
 
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As mentioned above, I would not expect the container to invalidate the session exactly on x number of seconds.
Most likely the container checks for timed out sessions once every X minutes. I would consult the docs of the server you are using to see if you can adjust this, or at the very least see if you can determine the value.
 
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