sessions

[Nick Delauney]

Hello everyone, I have some code I was working on for friend. For some reason the session objects work on my machine but not on his. Can anyone tell me why this could happen? Do you have to declare a session object before you use it ? or is it automatic ?
Thanks,

[Nicholas Turner]

specify the scope at the top of the page

[Jason Taylor]

You must explicitly define a session object, another thing if you are using jsp and you want to retrieve the object you placed in the session you must typecast the object,that was placed in the session, back to what it originally was.

[Andy Bowes]

Sessions are automatically created by the WebServer, you don't need to explicitly create one. (Which WebServer are you using ?)
If you are having problems with sessions it could be that a new session is being created for each Http Request. You can check this by retreiving the id of the current session from the request:
request.getSession().getId();
If everything is working correctly, the same Session Id should be be returned for each request from a specific client (until they shut their browser). If not then it would appear that a different session is being created for each request. This could be due to a number of issues e.g. the original session could have timed out due to having too small a session lifetime configured on the server or the web container cannot locate the session id from the incoming request (This is typically stored in a cookie or request parameter with a name of jsessionid).
I suggest that you do a bit of detective work and see if you can read the session id from the incoming request.
HTH