Hi,
Try printing out the SessionId in those pages where you are getting the problem.
Mostly, it could be because of your session getting expired.
There should be provision in your Web Server to set the Session Timeout interval.
With regards,
R. Bala
-----Original Message-----
From: Dennis Huang [SMTP:[EMAIL PROTECTED]]
Sent: Friday, March 03, 2000 6:33 AM
To: [EMAIL PROTECTED]
Subject: Re: problem with sessions and jsp
Does anybody know what is lifetime for the session object? In ASP, by
default it's 20 minutes. How much is it in JSP?
Thanks,
Dennis
-----Original Message-----
From: Bradley McLain [mailto:[EMAIL PROTECTED]]
Sent: Monday, February 28, 2000 7:42 AM
To: [EMAIL PROTECTED]
Subject: problem with sessions and jsp
i am creating a web app that uses a servlet to login and then passes the
user along to an initial jsp and several sub-jsps below that. once i
authenticate the user in the servlet i store their info (userid, logintime)
in the session object because i want to display that on all the subsequent
jsps.
After placing the info in the session object and redirecting to the first
jsp i am able to extract and display that information 100% of the time.
my problem is this: any calls to subsequent jsps may or may not be able to
extract the info. about 30% of the time when i try to display the info my
variables are null. in other words, the information is no longer there.
here is the code i'm using on each page. it comes before the </head> tag:
String foo
..
foo = (String) session.getValue("userName"); //get the value
..
session.putValue("userName", foo); //place back in the session for next
page
..
as i said before, this works about 60-70% of the time, and the subsquent
page will successfully extract 'userName' and assign it to 'foo'. but other
times the value isn't there and foo is null, throwing a nullpointerexception
when i try to put it back into the session.
am i doing something completely wrong here? am i leaving something out? any
help would be very welcome.
bradley
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