Re: NullPointerException from HttpSessionFacade.invalidate()

[Craig R. McClanahan]

"Christopher K. St. John" wrote:

> "Craig R. McClanahan" wrote:
> >
> > If your server implements session swapping or distribution (as we are currently
> > developing in the 4.1 repository), it is pretty much guaranteed that different
> > session object instances may be used during the lifetime of the same session.
> >
>
>  But don't you get session lifecycle events if that happens?
>

Yes ... sessionWillPassivate() before the old session is removed, and
sessionDidActivate() after the new one has been installed.

My point in the remark above is that it is *not* a good assumption that a session
instance will be the same physical object throughout the session's lifetime.  And, on
a servlet 2.2 based server, there is no mechanism to tell you when it changes,
because the events are new to 2.3.

>
> -cks
>

Craig



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