diff -r 1d109fb9c67c -r c992811edec2 server/session.py
--- a/server/session.py	Thu Jun 27 19:02:06 2013 +0200
+++ b/server/session.py	Thu Jun 27 19:09:23 2013 +0200
@@ -629,10 +629,14 @@
                 cnxset.cnxset_freed()
                 self.repo._free_cnxset(cnxset)
 
+    @deprecated('[4.0] cnxset are automatically managed now.'
+                ' stop using explicit set and free.')
     def set_cnxset(self):
         self._auto_free_cnx_set = False
         return self._set_cnxset()
 
+    @deprecated('[4.0] cnxset are automatically managed now.'
+                ' stop using explicit set and free.')
     def free_cnxset(self, ignoremode=False):
         self._auto_free_cnx_set = True
         return self._free_cnxset(ignoremode=ignoremode)