diff --git a/lib/ot/editor-socketio-server.js b/lib/ot/editor-socketio-server.js
index 67920cb..1b2529b 100755
--- a/lib/ot/editor-socketio-server.js
+++ b/lib/ot/editor-socketio-server.js
@@ -51,7 +51,7 @@ EditorSocketIOServer.prototype.addClient = function (socket) {
             try {
                 self.onOperation(socket, revision, operation, selection);
             } catch (err) {
-                socket.disconnect();
+				socket.disconnect(true);
             }
         });
     });
diff --git a/lib/realtime.js b/lib/realtime.js
index 1e1f010..af33cad 100644
--- a/lib/realtime.js
+++ b/lib/realtime.js
@@ -171,9 +171,12 @@ function getStatus(callback) {
 }
 
 function getNotenameFromSocket(socket) {
+    if (!socket || !socket.handshake || !socket.handshake.headers) {
+        return;
+    }
     var referer = socket.handshake.headers.referer;
     if (!referer) {
-        return socket.disconnect();
+        return socket.disconnect(true);
     }
     var hostUrl = url.parse(referer);
     var notename = hostUrl.pathname.split('/')[1];
@@ -184,7 +187,7 @@ function getNotenameFromSocket(socket) {
         socket.emit('info', {
             code: 404
         });
-        return socket.disconnect();
+        return socket.disconnect(true);
     }
     notename = LZString.decompressFromBase64(notename);
     return notename;
@@ -281,7 +284,10 @@ function startConnection(socket) {
     isConnectionBusy = true;
 
     var notename = getNotenameFromSocket(socket);
-    if (!notename) return;
+    if (!notename) {
+		isConnectionBusy = false;
+		return;
+	}
 
     if (!notes[notename]) {
         db.readFromDB(notename, function (err, data) {
@@ -289,7 +295,7 @@ function startConnection(socket) {
                 socket.emit('info', {
                     code: 404
                 });
-                socket.disconnect();
+                socket.disconnect(true);
                 //clear err socket in queue
                 for (var i = 0; i < connectionSocketQueue.length; i++) {
                     if (connectionSocketQueue[i].id == socket.id)
@@ -306,6 +312,7 @@ function startConnection(socket) {
             Note.findOrNewNote(notename, permission, function (err, note) {
                 if (err) {
                     responseError(res, "404", "Not Found", "oops.");
+					isConnectionBusy = false;
                     return;
                 }
                 var body = LZString.decompressFromBase64(data.rows[0].content);
@@ -338,7 +345,10 @@ function disconnect(socket) {
         logger.info(JSON.stringify(users[socket.id]));
     }
     var notename = getNotenameFromSocket(socket);
-    if (!notename) return;
+    if (!notename) {
+		isDisconnectBusy = false;
+		return;
+	}
     if (users[socket.id]) {
         delete users[socket.id];
     }