Grpc.Core.RpcException: 'Status (StatusCode = "Unavailable", Detail = "错误启动 gRPC 调用
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【中文标题】Grpc.Core.RpcException: \'Status (StatusCode = "Unavailable", Detail = "错误启动 gRPC 调用【英文标题】:Grpc.Core.RpcException: 'Status (StatusCode = "Unavailable", Detail = "Error starting gRPC callGrpc.Core.RpcException: 'Status (StatusCode = "Unavailable", Detail = "错误启动 gRPC 调用 【发布时间】:2022-01-06 03:36:24 【问题描述】:如果您能告诉我问题的原因以及解决方法,我将不胜感激。
附:抱歉发布所有代码,只是我不确定哪个确切部分与问题相关。
这里是异常的全文:
Grpc.Core.RpcException: 'Status (StatusCode = "Unavailable", Detail = "错误启动 gRPC 调用。HttpRequestException:连接未建立,因为目标计算机拒绝了连接请求。SocketException:连接未建立。目标计算机拒绝连接请求。", DebugException =" System.Net.Http.HttpRequestException: 连接未建立,因为目标计算机拒绝了连接请求。 ----> System.Net.Sockets.SocketException (10061):连接未建立,因为目标计算机拒绝了连接请求。 在 System.Net.Http.ConnectHelper.ConnectAsync (字符串主机,Int32 端口,CancellationToken 取消令牌) ----内部异常堆栈跟踪结束---- 在 System.Net.Http.ConnectHelper.ConnectAsync (字符串主机,Int32 端口,CancellationToken 取消令牌) 在 System.Net.Http.HttpConnectionPool.ConnectAsync(HttpRequestMessage 请求,布尔 allowHttp2,CancellationToken cancelToken) 在 System.Net.Http.HttpConnectionPool.GetHttp2ConnectionAsync(HttpRequestMessage 请求,CancellationToken cancelToken) 在 System.Net.Http.HttpConnectionPool.SendWithRetryAsync (HttpRequestMessage 请求,布尔 doRequestAuth,CancellationToken 取消令牌) 在 System.Net.Http.RedirectHandler.SendAsync(HttpRequestMessage 请求,CancellationToken cancelToken) 在 Grpc.Net.Client.Internal.GrpcCall
2.RunCall (HttpRequestMessage request, Nullable
1 超时)") '
这是服务器代码:
Program.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;
namespace GrpcHostServer
public class Program
public static void Main(string[] args)
CreateHostBuilder(args).Build().Run();
public static IHostBuilder CreateHostBuilder(string[] args) =>
Host.CreateDefaultBuilder(args)
.ConfigureServices(services =>
services.AddHostedService<Worker>();
);
Worker.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;
using GrpcHostServer.Services;
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.Server.Kestrel.Core;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;
using Microsoft.Extensions.Logging;
namespace GrpcHostServer
public class Worker : BackgroundService
private readonly ILogger<Worker> _logger;
public Worker(ILogger<Worker> logger)
_logger = logger;
protected override async Task ExecuteAsync(CancellationToken stoppingToken)
await Host.CreateDefaultBuilder()
.ConfigureWebHostDefaults(builder =>
builder
.ConfigureKestrel(options =>
options.ListenAnyIP(0, listenOptions =>
listenOptions.Protocols = HttpProtocols.Http2;
);
)
.UseKestrel()
.UseStartup<GrpcServerStartup>();
)
.Build()
.StartAsync(stoppingToken);
public class GrpcServerStartup
public void ConfigureServices(IServiceCollection services)
services.AddGrpc();
services.AddSingleton<GreeterService>();
public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
app.UseRouting();
app.UseEndpoints(endpoints =>
endpoints.MapGrpcService<GreeterService>();
);
这是客户端代码
Program.cs
using Grpc.Net.Client;
using GrpcHostServer;
using System;
using System.Threading.Tasks;
namespace GrpcClient
class Program
static async Task Main(string[] args)
var input = new HelloRequest Name = "Boris" ;
var channel = GrpcChannel.ForAddress("https://localhost:5001");
var client = new Greeter.GreeterClient(channel);
var reply = await client.SayHelloAsync(input);
Console.WriteLine(reply.Message);
Console.ReadLine();
【问题讨论】:
我怀疑options.ListenAnyIP(0, ...)
只会绑定到任何端口。您在客户端中指定端口 5001,因此我建议您在服务器中明确侦听该端口。
非常感谢,帮了大忙!
【参考方案1】:
在服务器的 5001 端口上进行显式侦听解决了该问题。
【讨论】:
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