diff --git a/lib/ConnectionManager.js b/lib/ConnectionManager.js
index d3c0226..6c56d76 100644
--- a/lib/ConnectionManager.js
+++ b/lib/ConnectionManager.js
@@ -214,6 +214,10 @@ ConnectionManager.prototype.getSessionTimeout = function () {
 ConnectionManager.prototype.connect = function () {
     var self = this;
 
+    if (self.state === STATES.CLOSING) {
+        return;
+    }
+
     self.setState(STATES.CONNECTING);
 
     self.findNextServer(function (server) {