servlet chaining, session null

[SAMEUNIE]

Hi, i'm trying to use Servlet chaining with three servlets. In the first one
i create a cession (if it doesn't exist), in the second one i put some
attributes in the cession. But when i arrive in the third servlet, my
session is null?
As anybody already had this problem ?

Is it possible to get the path of the servlet who called the last one ?
I mean if i am in the ith servlet, how can i get the path of the (i-1)th
servlet ?
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