----- Original Message -----
From: Craig R. McClanahan <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Tuesday, May 04, 1999 7:49 PM
Subject: Re: Request Synchronization
> >
>
> Servlet engines only serialize access to servlets that implement
> SingleThreadModel. For all other cases (either instance variables within
a
> servlet itself, or user objects stored in an HttpSession), you are
responsible
> for any synchronization that is required.
>
In the case of objects stored in an HttpSession, I'm not certain that
SingleThreadModel will make your servlet thread-safe. The servlet engine is
free to implement "SingleThreadModel" by have two or more instances of the
servlet. In this case, you could still have two threads going through an
object stored in HttpSession.
>
> --> Race condition on session variables unless you have taken proper care
to
> synchronize things.
>
> Craig McClanahan
>
>
Tuyen Tran
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