我的后端服务在.NET中，我在Docker容器中运行它。同时，rabbitmq也在容器中运行。
运行服务时，它从.NET应用程序中抛出以下错误消息：

There was error while connecting Rabiitmq Broker.
      RabbitMQ.Client.Exceptions.BrokerUnreachableException: None of the specified endpoints were reachable
       ---> System.AggregateException: One or more errors occurred. (Connection failed)
       ---> RabbitMQ.Client.Exceptions.ConnectFailureException: Connection failed
       ---> System.Net.Sockets.SocketException (111): Connection refused
         at System.Net.Sockets.Socket.AwaitableSocketAsyncEventArgs.ThrowException(SocketError error, CancellationToken cancellationToken)
         at System.Net.Sockets.Socket.AwaitableSocketAsyncEventArgs.System.Threading.Tasks.Sources.IValueTaskSource.GetResult(Int16 token)
         at System.Threading.Tasks.ValueTask.ValueTaskSourceAsTask.<>c.<.cctor>b__4_0(Object state)
      --- End of stack trace from previous location ---
         at RabbitMQ.Client.Impl.TcpClientAdapter.ConnectAsync(String host, Int32 port)
         at RabbitMQ.Client.Impl.TaskExtensions.TimeoutAfter(Task task, TimeSpan timeout)
         at RabbitMQ.Client.Impl.SocketFrameHandler.ConnectOrFail(ITcpClient socket, AmqpTcpEndpoint endpoint, TimeSpan timeout)
         --- End of inner exception stack trace ---
         at RabbitMQ.Client.Impl.SocketFrameHandler.ConnectOrFail(ITcpClient socket, AmqpTcpEndpoint endpoint, TimeSpan timeout)


 var factory = new ConnectionFactory { HostName = hostName, Port = 5672 };
  factory.UserName = PathManager.DataPathManager.GetRabbitmqUserName();
  factory.Password = PathManager.DataPathManager.GetRabbitmqPassword();

             
  _logger.LogInformation($"{module} > ExecuteAsync > factory object created");
                var connection = factory.CreateConnection();
                _logger.LogInformation($"{module} > ExecuteAsync > CreateConnection() method called");

  channel = connection.CreateModel();
  _logger.LogInformation($"{module} > ExecuteAsync > CreateModel() method called");

我可以发送信息，但不能阅读它。但是，在接收端得到这个

There was error while synchronizing with Broker queue.
  System.NullReferenceException: Object reference not set to an instance of an object.
     at Indus.Product.Manager.Managers.ProcessEventHandler.Receive(IModel channel) in /agent/work/5/s/Service/Source/MicroServices/Services/Product/Manager/Managers/Handler.cs:line 128
     at Indus.Product.Manager.SynchronisationWorker.ExecuteAsync(CancellationToken stoppingToken) in /agent/work/5/s/Service/Source/MicroServices/Services/Product/Manager/Handler.cs:line 96