diff --git a/openerp/addons/base/res/res_users.py b/openerp/addons/base/res/res_users.py
index 3aee2ed630b..5d376ccf07f 100644
--- a/openerp/addons/base/res/res_users.py
+++ b/openerp/addons/base/res/res_users.py
@@ -398,10 +398,10 @@ class res_users(osv.osv):
                 # prevent/delay login in that case. It will also have been logged
                 # as a SQL error, if anyone cares.
                 try:
-                    cr.execute("SELECT id FROM res_users WHERE id=%s FOR UPDATE NOWAIT", (user_id,))
+                    cr.execute("SELECT id FROM res_users WHERE id=%s FOR UPDATE NOWAIT", (user_id,), log_exception=False)
                     cr.execute("UPDATE res_users SET login_date = now() AT TIME ZONE 'UTC' WHERE id=%s", (user_id,))
-                except Exception, e:
-                    _logger.exception("Failed to update last_login for db:%s login:%s", db, login)
+                except Exception:
+                    _logger.debug("Failed to update last_login for db:%s login:%s", db, login, exc_info=True)
         except openerp.exceptions.AccessDenied:
             _logger.info("Login failed for db:%s login:%s", db, login)
             user_id = False