在Linux /单声道SocketException SignalR Owin自主机当客户端连接丢失 [英] SignalR Owin Self-Host on Linux/Mono SocketException when clients lose connection
问题描述
我正在通过Owin很简单signalr服务器托管的自Ubuntu服务器14.04，单3.2.8上。 （下面的代码）。
I'm running very simple signalr server self-hosted via Owin on ubuntu server 14.04, mono 3.2.8. (code below).
连接/断开正常工作既是一个远程Windows Server和我的位部署到Linux服务器上。但是，当一个客户端死机告诉signalr他是断开的，而不是意外，那个时候我也只是在Linux服务器上得到一个永无止境的SocketException。在Windows服务器约30秒左右后断开客户端，但Linux服务器喷出的socketexception（下文）每10秒左右，直到永远。
Connecting/Disconnecting works fine on both a remote windows server and when I deploy the bits to the linux server. But when a client dies unexpectedly instead of telling signalr that he's disconnecting, that's when I get a never-ending SocketException only on the linux server only. The windows server disconnects the client after about 30 seconds or so, but the linux server spews the socketexception (also below) every 10 seconds or so, forever.
我怎么能？使运行相同的代码时，Linux服务器的行为就像在Windows服务器，一组超时后断开用户连接并不会抛出socketexceptions
How can I make the linux server behave like the windows server when running the same code, disconnect the user after a set timeout and not throw socketexceptions?
using System;
using System.Threading.Tasks;
using Microsoft.AspNet.SignalR;
using Owin;
namespace signalrtestserver
{
class Program
{
static void Main(string[] args)
{
var uri = System.Configuration.ConfigurationManager.AppSettings["startup_uri"] ?? "http://*:7890";
using (Microsoft.Owin.Hosting.WebApp.Start<Startup>(uri))
{
Console.WriteLine(string.Format("Server started on {0}. Press enter to close.", uri));
Console.ReadLine();
}
}
}
class Startup
{
static Hub hub;
public void Configuration(IAppBuilder app)
{
app.UseCors(Microsoft.Owin.Cors.CorsOptions.AllowAll);
var configuration = new HubConfiguration();
configuration.EnableDetailedErrors = true;
app.MapSignalR("/signalr", configuration);
hub = new MyHub();
}
}
public class MyHub : Hub
{
public override Task OnConnected() { Console.WriteLine(Context.ConnectionId + " connected"); return base.OnConnected(); }
public override Task OnDisconnected() { Console.WriteLine(Context.ConnectionId + " disconnected"); return base.OnDisconnected(); }
public override Task OnReconnected() { Console.WriteLine(Context.ConnectionId + " reconnected"); return base.OnReconnected(); }
}
}
客户端代码：
Client Code:
using System;
using System.Net;
using Microsoft.AspNet.SignalR.Client;
namespace signalrconnection
{
class Program
{
static void Main(string[] args)
{
var uri = System.Configuration.ConfigurationManager.AppSettings["signalr_uri"] ?? "http://localhost:7890/signalr";
ServicePointManager.DefaultConnectionLimit = 10;
var hubConnection = new HubConnection(uri, false);
hubConnection.StateChanged += stateChange => Console.WriteLine(string.Format("SignalR {0} >> {1} ({2})", stateChange.OldState, stateChange.NewState, hubConnection.Transport == null ? "<<null>>" : hubConnection.Transport.Name));
var hubProxy = hubConnection.CreateHubProxy("MyHub");
hubConnection.Start();
Console.WriteLine("Press enter to die...");
Console.ReadLine();
//hubConnection.Dispose(); //uncomment this to simulate a graceful disconnect which works on both windows and linux
}
}
}
$工作b
$ b
永无止境的单声道例外：
Never-Ending Mono Exception:
{path-to-project}/Microsoft.AspNet.SignalR.Core.dll Error : 0 : SignalR exception thrown by Task: System.AggregateException: One or more errors occured ---> System.IO.IOException: Write failure ---> System.Net.Sockets.SocketException: Connection reset by peer
at System.Net.Sockets.Socket.Send (System.Byte[] buf, Int32 offset, Int32 size, SocketFlags flags) [0x00000] in <filename unknown>:0
at System.Net.Sockets.NetworkStream.Write (System.Byte[] buffer, Int32 offset, Int32 size) [0x00000] in <filename unknown>:0
--- End of inner exception stack trace ---
at System.Net.Sockets.NetworkStream.Write (System.Byte[] buffer, Int32 offset, Int32 size) [0x00000] in <filename unknown>:0
at System.Net.ResponseStream.InternalWrite (System.Byte[] buffer, Int32 offset, Int32 count) [0x00000] in <filename unknown>:0
at System.Net.ResponseStream.Write (System.Byte[] buffer, Int32 offset, Int32 count) [0x00000] in <filename unknown>:0
at Microsoft.Owin.Host.HttpListener.RequestProcessing.ExceptionFilterStream.Write (System.Byte[] buffer, Int32 offset, Int32 count) [0x00000] in <filename unknown>:0
--- End of inner exception stack trace ---
--> (Inner exception 0) System.IO.IOException: Write failure ---> System.Net.Sockets.SocketException: Connection reset by peer
at System.Net.Sockets.Socket.Send (System.Byte[] buf, Int32 offset, Int32 size, SocketFlags flags) [0x00000] in <filename unknown>:0
at System.Net.Sockets.NetworkStream.Write (System.Byte[] buffer, Int32 offset, Int32 size) [0x00000] in <filename unknown>:0
--- End of inner exception stack trace ---
at System.Net.Sockets.NetworkStream.Write (System.Byte[] buffer, Int32 offset, Int32 size) [0x00000] in <filename unknown>:0
at System.Net.ResponseStream.InternalWrite (System.Byte[] buffer, Int32 offset, Int32 count) [0x00000] in <filename unknown>:0
at System.Net.ResponseStream.Write (System.Byte[] buffer, Int32 offset, Int32 count) [0x00000] in <filename unknown>:0
at Microsoft.Owin.Host.HttpListener.RequestProcessing.ExceptionFilterStream.Write (System.Byte[] buffer, Int32 offset, Int32 count) [0x00000] in <filename unknown>:0
任何帮助将不胜感激。在此先感谢！
Any help would be much appreciated. Thanks in advance!
推荐答案
现在的问题是这一行静态HUB集线器 ，而这一次枢纽=新MyHub（）在启动方法。
The problem is this line static Hub hub, and this one hub = new MyHub() in your Startup method.
您不必明确创建集线器类的实例，无论你需要保持一个参考各地。毂类被实例化在每次请求到服务器。见
HTTP：//www.asp .NET / signalr /概述/ signalr-20 /集线器-API /集线器-API的指南服务器＃短暂上的集线器对象生存栏目
You do not need to explicitly create instances of the Hub class, neither do you need to keep a reference around. The hub class is instantiated on every request to the server. See http://www.asp.net/signalr/overview/signalr-20/hubs-api/hubs-api-guide-server#transience the section on Hub object lifetime.
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