Session Timeout issue

I want to set my session timeout to 8 hours.  I am using SunOne webserver.

In my JSP, I have  session.setMaxInactiveInterval(60*60*8);
But my session seems to get timed out in less than 30 minutes.

I tried to print session.getMaxInactiveInterval and it does print 28800(60*60*8) but for some reason session gets invalidated in about 30 minutes. any thoughts?

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You should really be setting your session timeouts in the web.xml

Why do you need a 8 hour session? Remember that a session expires a set time after the last recorded request from that user, not from the start of that session.

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Yes bloodredsun is right you can set the sessin timeout time in web.xml as:

Here the value of session-timeout tag is timeout for a session in minutes.
mytiligAuthor Commented:
I have removed the session.setMaxInactiveInterval(60*60*8);  from my code and added this to my web.xml
            <session-timeout>720 </session-timeout>    

(I want the session to time out after 12 hours.)

The application still seems to be getting timed out after the 1st hour before the 2nd hour. I print session.getMaxInactiveInterval() in my main JSP page, and it prints 43200 (720*60), so I am inclined to believe it is reading web.xml correctly.
Wondering why it still times out quickly?
How are you measuring session timeout interval?
Seems there might be bug in few of the web servers.
mytiligAuthor Commented:
I have sunone 6.1 webserver. The doc says timeout should be given in minutes within web.xml
When I specify it as 720 and execute my code to print sessiontimeout, it prints 43200 (720*60)
Thank you.
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