diff --git a/lib/application.js b/lib/application.js
index f214a16ae..014c6f304 100644
--- a/lib/application.js
+++ b/lib/application.js
@@ -576,7 +576,7 @@ Application.disable = function (setting) {
 Application.configure = function (env, type, fn) {
   var args = [].slice.call(arguments);
   fn = args.pop();
-  env = type = Constants.RESERVED.ALL;
+ // env = type = Constants.RESERVED.ALL;  看起来没有什么用，而且反而污染了全局变量。
 
   if(args.length > 0) {
     env = args[0];