How to avoid the message of “server-start” while opening another Emacs session?

Question

I have a line (server-start) in my .emacs for some reasons. Everything is fine when I launch a first session of Emacs, but when I open anther session,

Answer 1

Try:

(require 'server)
(or (server-running-p)
    (server-start))

Note that server-running-p does not appear in the manual, so conceivably this could break with future versions of Emacs.