Also clear the shutdown timer in GracefulServer, even though we're pr…

…ocess.exit(0)'ing immediately afterwards. Leaking resources is no bueno.

lib/graceful-server.js

@@ -10,6 +10,7 @@ var GracefulServer = function(options) {
 
     this.log = options.log || console.log;
     this.shutdownTimeout = options.shutdownTimeout || 5000;
+    this._shutdownTimer = null;
 
     // Solution got from: https://github.com/nodejs/node-v0.x-archive/issues/9066#issuecomment-124210576
 
@@ -66,13 +67,14 @@ GracefulServer.prototype.shutdown = function() {
 
     var that = this;
 
-    setTimeout(function() {
+    this._shutdownTimer = setTimeout(function() {
         that.log('pid:' + process.pid + ' graceful shutdown: timeout, force exit.');
         process.exit(0);
     }, this.shutdownTimeout);
 
     this.server.close(function() {
         that.log('pid:' + process.pid + ' graceful shutdown: done.');
+        if (that._shutdownTimer) clearTimeout(that._shutdownTimer);
         process.exit(0);
     });