Index: lib/net/http.rb
===================================================================
--- lib/net/http.rb	(revision 48533)
+++ lib/net/http.rb	(working copy)
@@ -914,7 +914,10 @@
             @socket.write(buf)
             HTTPResponse.read_new(@socket).value
           end
-          s.session = @ssl_session if @ssl_session
+          if @ssl_session and
+             Time.now < @ssl_session.time + @ssl_session.timeout
+            s.session = @ssl_session if @ssl_session
+          end
           # Server Name Indication (SNI) RFC 3546
           s.hostname = @address if s.respond_to? :hostname=
           Timeout.timeout(@open_timeout, Net::OpenTimeout) { s.connect }