信号器呼叫挂起浏览器

Question

以下是一个例子， http://www.venkatbaggu.com/signalr-database-update-notifications-asp-net-mvc-usiing-sql-dependency/

  $(function () {
        // Declare a proxy to reference the hub.
        var notifications = $.connection.messagesHub;

        //debugger;
        // Create a function that the hub can call to broadcast messages.
        notifications.client.updateMessages = function () {
            getMyMessages();
        };

        // Start the connection.
        $.connection.hub.start().done(function () {
            //alert("connection started");
            getMyMessages();
        }).fail(function (e) {
            alert(e);
        });
    });


    function getMyMessages() {
        var tbl = $('#mesTable');
        $.ajax({
            url: '/Home/GetMyMessages',
            contentType: 'application/html ; charset:utf-8',
            type: 'GET',
            dataType: 'html'
        }).success(function (result) {
            tbl.empty().append(result);
        }).error(function () {

        });
    }

我有上面的signalr代码。当我在本地计算机上运行它时它工作正常，但当我在IIS上部署并测试多个用户时，浏览器没有响应。

请告诉我这个错误的地方

集线器

     [HubMethodName("sendMessages")]
            public static void SendMyMessages()
            {
                IHubContext context = GlobalHost.ConnectionManager.GetHubContext<MessagesHub>();
                context.Clients.All.updateMessages();
            }

----------------------------------------------------------------------
public IEnumerable<Messages> GetAllMessages()
        {
            var messages = new List<Messages>();
            using (var connection = new SqlConnection(_connString))
            {
                connection.Open();

using (var command = new SqlCommand(@"SELECT [DoctorId], [DisplayName], [EmptyMessage], [Date] FROM [dbo].[Messages]", connection))
                {
                    command.Notification = null;

                    var dependency = new SqlDependency(command);
                    dependency.OnChange += new OnChangeEventHandler(dependency_OnChange);

                    if (connection.State == ConnectionState.Closed)
                        connection.Open();

                    var reader = command.ExecuteReader();

                    while (reader.Read())
                    {
                      messages.Add(item: new DocNotification { Id = (int)reader["Id"], DoctorId = (int)reader["DoctorId"], DisplayName = reader["DisplayName"] != DBNull.Value ? (string)reader["Message"] : "";
                    }
                }

            }
            return messages;
        }

        private void dependency_OnChange(object sender, SqlNotificationEventArgs e)
        {
            if (e.Type == SqlNotificationType.Change)
            {
                MessagesHub.SendMyMessages();
            }
        }