our team find some way to reproduce "No connection" exception。

1. write a timer，loop every second to send command，just like:
   `private static void OnTimedEvent(Object source, ElapsedEventArgs e)
   {
   try
   {
   if (!rh.IsConnected())
   {

                Console.WriteLine("连接失败!"+ Spid.ToString());
                LogHelper.WriteLog(Enumerate.CodeType.Code001, Enumerate.NLogType.Error, "连接失败!"+ Spid.ToString());
            }
            Random rd = new Random();
            rh.StringSet("dataKey_" + rd.Next(0, 120).ToString(), "model", new TimeSpan?(TimeSpan.FromDays(1.0)));
        }
        catch (Exception ex)
        {
            if(ex.Message.Contains("No connection") || ex.StackTrace.Contains("No connection"))
            {
                string msg = string.Format("Redis设置Key-Value时异常。spid：" + Spid.ToString());
                LogHelper.WriteLog(Enumerate.CodeType.Code001, Enumerate.NLogType.Error, msg, ex);
            }
            
        }
    }`
   

2. use cmd open about 100 exe，like “start D:\Debug\redistest.exe”；

3. open redis-cli.exe，connect to server，then send command “client pause 5000”，pause 5 seconds or longer，After 5 seconds, some programs cannot reconnect normally, and continue to report connection failure, and the exception message is “No connection “
   @NickCraver