Feasible to run pool of v2 and v3 IdP servers?

[Cantor, Scott]

> > We are working on our Shibboleth IdP v2 to v3 upgrade. Currently, we
> > have a load-balanced pool of v2 IdP servers. We are thinking to bring up
> > a new IdP v3 server and then add it to the pool of v2 servers as a first
> > test. Would that work? Has anyone done that?
> 
> No, it wouldn't work in any sensible way.

(Modulo just giving up SSO between them of course. The endpoints and public interface are compatible and it would probably not be noticeable to a user apart from just more logins depending on stickiness.)

-- Scott