Signalr，客户端说已连接但无法通过服务器进行通信

Question

我们有一个客户端和一个服务器，它们通过信号器进行通信。在客户端，当它第一次启动时，它能够通过信号器与服务器连接，并通过集线器与一些信号器方法进行通信。但是在特定事件之后，服务器无法通过信号器进行通信。但在客户端它显示为连接已连接。以下是与服务器连接后来自客户端的信号器跟踪日志。

9492fb51-e37b-4f6c-b184-536c87dd73f1 - SSE: OnMessage(Data: initialized)
9492fb51-e37b-4f6c-b184-536c87dd73f1 - SSE: OnMessage(Data: {"C":"s-0,C5FA","S":1,"M":[]})
9492fb51-e37b-4f6c-b184-536c87dd73f1 - OnMessage({"I":"93"})
9492fb51-e37b-4f6c-b184-536c87dd73f1 - ChangeState(Connecting, Connected)
9492fb51-e37b-4f6c-b184-536c87dd73f1 - SSE: OnMessage(Data: {"C":"s-0,C636","M":[{"H":"PrintConnectorHub","M":"Registered","A":[{"Connected":false,"ErrorCount":0,"InstalledBy":{"EmployeeId":1111,"Firstname":null,"Lastname":null},"Name":"*** ***","Server":{"ComputerName":"**","IPAddress":"****","MACAddress":"****","OperatingSystem":"Microsoft® Windows Server® 2008 Standard FE "},"Status":0,"Version":"1.4.4"}]}]})
9492fb51-e37b-4f6c-b184-536c87dd73f1 - OnMessage({"R":false,"I":"90"})
9492fb51-e37b-4f6c-b184-536c87dd73f1 - Callback with id 90 not found!
9492fb51-e37b-4f6c-b184-536c87dd73f1 - OnMessage({"R":false,"I":"94"})
9492fb51-e37b-4f6c-b184-536c87dd73f1 - OnMessage({"R":false,"I":"92"})
9492fb51-e37b-4f6c-b184-536c87dd73f1 - Callback with id 92 not found!
9492fb51-e37b-4f6c-b184-536c87dd73f1 - SSE: OnMessage(Data: {})
9492fb51-e37b-4f6c-b184-536c87dd73f1 - SSE: OnMessage(Data: {})
9492fb51-e37b-4f6c-b184-536c87dd73f1 - SSE: OnMessage(Data: {})
9492fb51-e37b-4f6c-b184-536c87dd73f1 - SSE: OnMessage(Data: {})

在此之后，尽管客户端仍然是连接的服务器，但无法通过信号器向客户端发送任何消息。我们的 2 个客户端和所有客户端信号器跟踪日志都面临这个问题，它在连接被触发后显示了这些日志行。

9492fb51-e37b-4f6c-b184-536c87dd73f1 - SSE: OnMessage(Data: {"C":"s-0,C636","M":[{"H":"PrintConnectorHub","M":"Registered","A":[{"Connected":false,"ErrorCount":0,"InstalledBy":{"EmployeeId":1111,"Firstname":null,"Lastname":null},"Name":"*** ***","Server":{"ComputerName":"**","IPAddress":"****","MACAddress":"****","OperatingSystem":"Microsoft® Windows Server® 2008 Standard FE "},"Status":0,"Version":"1.4.4"}]}]})
9492fb51-e37b-4f6c-b184-536c87dd73f1 - OnMessage({"R":false,"I":"90"})
9492fb51-e37b-4f6c-b184-536c87dd73f1 - Callback with id 90 not found!
9492fb51-e37b-4f6c-b184-536c87dd73f1 - OnMessage({"R":false,"I":"94"})
9492fb51-e37b-4f6c-b184-536c87dd73f1 - OnMessage({"R":false,"I":"92"})
9492fb51-e37b-4f6c-b184-536c87dd73f1 - Callback with id 92 not found!

41889ccd-5634-440a-95ef-fbbdcd340a19 - SSE: OnMessage(Data: {"C":"s-0,C634","M":[{"H":"PrintConnectorHub","M":"Registered","A":[{"Connected":false,"ErrorCount":0,"InstalledBy":{"EmployeeId":1111,"Firstname":null,"Lastname":null},"Name":"***","Server":{"ComputerName":"****","IPAddress":"****","MACAddress":"****","OperatingSystem":"Microsoft Windows Server 2008 R2 Standard "},"Status":0,"Version":"1.3.8"}]}]})
41889ccd-5634-440a-95ef-fbbdcd340a19 - SSE: OnMessage(Data: {})
41889ccd-5634-440a-95ef-fbbdcd340a19 - OnMessage({"R":false,"I":"611"})
41889ccd-5634-440a-95ef-fbbdcd340a19 - Callback with id 611 not found!
41889ccd-5634-440a-95ef-fbbdcd340a19 - OnMessage({"R":false,"I":"615"})
41889ccd-5634-440a-95ef-fbbdcd340a19 - OnMessage({"R":false,"I":"613"})
41889ccd-5634-440a-95ef-fbbdcd340a19 - Callback with id 613 not found!

我们正在使用 SQl 服务器和 SQL 服务器中的背板设置来使用横向扩展。上面的日志跟踪回调与 id not found 意味着什么，即使客户端日志显示为连接，服务器也无法与客户端通信可能是什么问题？

Answer 1

未找到 ID 为 613 的回调！ 未找到 id 为 611 的回调！

它说在 Hub 上找不到合适的方法。 您是否检查过您在正确的集线器上调用了正确的方法名称？

您可以这样做检查调用方法和参数：
定义你的管道模块

public class MyPipelineModule : HubPipelineModule
{
    protected override bool OnBeforeIncoming(IHubIncomingInvokerContext context)
    {
        //context.Args
        //context.Hub
        //context.MethodDescriptor.Name
        return base.OnBeforeIncoming(context);
    }
}

在您配置 SignalR 的位置：

GlobalHost.HubPipeline.AddModule(new MyPipelineModule());