C# 在AppPool循环后重新连接时，MVC5挂起MapSignal

我的Startup.SignalR.cs中有以下代码：

using Microsoft.AspNet.SignalR;
using Owin;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Admin
{
    public partial class Startup
    {
        public void ConfigureSignalR(IAppBuilder app)
        {
            var Config = new HubConfiguration()
            {
                EnableDetailedErrors = false,
                Resolver = new DefaultDependencyResolver()
            };

#if DEBUG
            Config.EnableDetailedErrors = true;
#endif
            // Any connection or hub wire up and configuration should go here
            app.MapSignalR();

            GlobalHost.Configuration.ConnectionTimeout = TimeSpan.FromSeconds(600);
        }
    }
}

在应用程序的初始加载过程中，一切正常，但是当允许线程休眠（保留约10分钟）时，AppPool被回收，线程卡在这条线上：

app.MapSignalR();

IDE被绿色箭头卡住，

这是该线程从当前函数返回时要执行的下一条语句。

。但是，我不知道此上下文中的当前函数是什么

尝试检查任何局部变量会导致

无法计算表达式，因为本机框架位于调用堆栈的顶部。

但是调用堆栈显示：

Admin.dll！Admin.Startup.configureSignal（Owin.IAppBuilder应用程序）第25行

作为顶部框架

代码永远不会从此状态恢复，必须通过重新启动调试会话来完全重新启动AppPool

有人对这种情况有什么解释吗

其他信息： 启用Debug=>Windows=>Parralell堆栈后，我看到了更详细的堆栈跟踪：

[Managed to Native Transition]  
mscorlib.dll!Microsoft.Win32.RegistryKey.OpenSubKey(string name, bool writable)
mscorlib.dll!Microsoft.Win32.RegistryKey.OpenSubKey(string name)
System.dll!System.Diagnostics.PerformanceCounterLib.FindCustomCategory(string category, out System.Diagnostics.PerformanceCounterCategoryType categoryType)
System.dll!System.Diagnostics.PerformanceCounterLib.IsCustomCategory(string machine, string category)
System.dll!System.Diagnostics.PerformanceCounter.InitializeImpl()
System.dll!System.Diagnostics.PerformanceCounter.PerformanceCounter(string categoryName, string counterName, string instanceName, bool readOnly)
Microsoft.AspNet.SignalR.Core.dll!Microsoft.AspNet.SignalR.Infrastructure.PerformanceCounterManager.LoadCounter(string categoryName, string counterName, string instanceName, bool isReadOnly)
Microsoft.AspNet.SignalR.Core.dll!Microsoft.AspNet.SignalR.Infrastructure.PerformanceCounterManager.LoadCounter(string categoryName, string counterName, bool isReadOnly)
Microsoft.AspNet.SignalR.Core.dll!Microsoft.AspNet.SignalR.Infrastructure.PerformanceCounterManager.SetCounterProperties()
Microsoft.AspNet.SignalR.Core.dll!Microsoft.AspNet.SignalR.Infrastructure.PerformanceCounterManager.Initialize(string instanceName, System.Threading.CancellationToken hostShutdownToken)
Microsoft.AspNet.SignalR.Core.dll!Microsoft.AspNet.SignalR.Hosting.HostDependencyResolverExtensions.InitializePerformanceCounters(Microsoft.AspNet.SignalR.IDependencyResolver resolver, string instanceName, System.Threading.CancellationToken hostShutdownToken)
Microsoft.AspNet.SignalR.Core.dll!Microsoft.AspNet.SignalR.Hosting.HostDependencyResolverExtensions.InitializeHost(Microsoft.AspNet.SignalR.IDependencyResolver resolver, string instanceName, System.Threading.CancellationToken hostShutdownToken)
Microsoft.AspNet.SignalR.Core.dll!Owin.OwinExtensions.UseSignalRMiddleware<Microsoft.AspNet.SignalR.Owin.Middleware.HubDispatcherMiddleware>(Owin.IAppBuilder builder, object[] args)
Microsoft.AspNet.SignalR.Core.dll!Owin.OwinExtensions.RunSignalR(Owin.IAppBuilder builder, Microsoft.AspNet.SignalR.HubConfiguration configuration)
Microsoft.AspNet.SignalR.Core.dll!Owin.OwinExtensions.MapSignalR.AnonymousMethod__0(Owin.IAppBuilder subApp)
Microsoft.Owin.dll!Owin.MapExtensions.Map(Owin.IAppBuilder app, Microsoft.Owin.PathString pathMatch, System.Action<Owin.IAppBuilder> configuration)
Microsoft.Owin.dll!Owin.MapExtensions.Map(Owin.IAppBuilder app, string pathMatch, System.Action<Owin.IAppBuilder> configuration)
Microsoft.AspNet.SignalR.Core.dll!Owin.OwinExtensions.MapSignalR(Owin.IAppBuilder builder, string path, Microsoft.AspNet.SignalR.HubConfiguration configuration)
Microsoft.AspNet.SignalR.Core.dll!Owin.OwinExtensions.MapSignalR(Owin.IAppBuilder builder, Microsoft.AspNet.SignalR.HubConfiguration configuration)
Microsoft.AspNet.SignalR.Core.dll!Owin.OwinExtensions.MapSignalR(Owin.IAppBuilder builder)
Admin.dll!Admin.Startup.ConfigureSignalR(Owin.IAppBuilder app) Line 25

[管理到本机转换]
mscorlib.dll！Microsoft.Win32.RegistryKey.OpenSubKey（字符串名称，布尔可写）
mscorlib.dll！Microsoft.Win32.RegistryKey.OpenSubKey（字符串名称）
System.dll！System.Diagnostics.PerformanceCounterLib.FindCustomCategory（字符串类别，out System.Diagnostics.PerformanceCounterCategory类别类型）
System.dll！系统.Diagnostics.PerformanceCounterLib.IsCustomCategory（字符串机器，字符串类别）
System.dll！System.Diagnostics.PerformanceCounter.InitializeImpl（）
System.dll！System.Diagnostics.PerformanceCounter.PerformanceCounter（字符串类别名称、字符串计数器名称、字符串实例名称、bool只读）
Microsoft.AspNet.SignalR.Core.dll！Microsoft.AspNet.signal.Infrastructure.PerformanceCounterManager.LoadCounter（字符串类别名称、字符串计数器名称、字符串实例名称、bool isReadOnly）
Microsoft.AspNet.SignalR.Core.dll！Microsoft.AspNet.signal.Infrastructure.PerformanceCounterManager.LoadCounter（字符串类别名称、字符串计数器名称、bool isReadOnly）
Microsoft.AspNet.SignalR.Core.dll！Microsoft.AspNet.signal.Infrastructure.PerformanceCounterManager.SetCounterProperties（）
Microsoft.AspNet.SignalR.Core.dll！Microsoft.AspNet.signar.Infrastructure.PerformanceCounterManager.Initialize（字符串instanceName，System.Threading.CancellationToken HostShutdowToken）
Microsoft.AspNet.SignalR.Core.dll！Microsoft.AspNet.signal.Hosting.HostDependencyResolveX.InitializePerformanceCounters（Microsoft.AspNet.signer.IDependencyResolver解析器、字符串instanceName、System.Threading.CancellationToken HostShutdowToken）
Microsoft.AspNet.SignalR.Core.dll！Microsoft.AspNet.signer.Hosting.hostDependencyResolveXtensions.InitializeHost（Microsoft.AspNet.signer.IDependencyResolver解析器、字符串instanceName、System.Threading.CancellationToken HostShutdowToken）
Microsoft.AspNet.SignalR.Core.dll！Owin.Owin.usesignalrmidware（Owin.IAppBuilder构建器，对象[]参数）
Microsoft.AspNet.SignalR.Core.dll！Owin.Owin.runsignar（Owin.IAppBuilder builder，Microsoft.AspNet.signar.hub配置）
Microsoft.AspNet.SignalR.Core.dll！Owin.Owin.mapsigner.AnonymousMethod\uu0（Owin.IAppBuilder子应用）
Microsoft.Owin.dll！Owin.MapExtensions.Map（Owin.IAppBuilder应用程序，Microsoft.Owin.PathString路径匹配，系统操作配置）
Microsoft.Owin.dll！映射（Owin.IAppBuilder应用程序，字符串路径匹配，系统操作配置）
Microsoft.AspNet.SignalR.Core.dll！Owin.Owin.MAPSIGNAR（Owin.IAppBuilder生成器，字符串路径，Microsoft.AspNet.signal.HubConfiguration）
Microsoft.AspNet.SignalR.Core.dll！Owin.Owin.mapsigner（Owin.IAppBuilder builder，Microsoft.AspNet.signal.hub配置）
Microsoft.AspNet.SignalR.Core.dll！Owin.Owin.mapsigner（Owin.IAppBuilder）
Admin.dll！Admin.Startup.configureSignal（Owin.IAppBuilder应用程序）第25行

正如Pawel所提到的，我能够通过使用虚拟性能计数器解决我的问题，如下所述：

---

此问题的另一个解决方案，来自此博客帖子：

---

我在这里找到了解决方案：github.com/SignalR/SignalR/issues/3414 剪样：

public void Configuration(IAppBuilder app)
{
    var task = Task.Run(() => app.MapSignalR());
    task.Wait(300);
    //try again if it fails just to be sure ;)
    if (task.IsCanceled) Task.Run(() => app.MapSignalR()).Wait(300);
}

---

这看起来与此类似：我也遇到了同样的问题。我最初尝试了这种方法，但没有起到任何作用，我在第一个

任务中仍然遇到挂起。Run（）

，尽管它有300毫秒的等待超时。请参阅下面@eladm的答案，因为这是SignalR dev分支中的官方修复。尚未在2.2.0中发布。

app.SanitizeThreadCulture();

public static void SanitizeThreadCulture(this IAppBuilder app)
{
        var currentCulture = CultureInfo.CurrentCulture;

        // at the top of any culture should be the invariant culture,
        // find it doing an .Equals comparison ensure that we will
        // find it and not loop endlessly
        var invariantCulture = currentCulture;
        while (invariantCulture.Equals(CultureInfo.InvariantCulture) == false)
            invariantCulture = invariantCulture.Parent;

        if (ReferenceEquals(invariantCulture, CultureInfo.InvariantCulture))
            return;

        var thread = Thread.CurrentThread;
        thread.CurrentCulture = CultureInfo.GetCultureInfo(thread.CurrentCulture.Name);
        thread.CurrentUICulture = CultureInfo.GetCultureInfo(thread.CurrentUICulture.Name);
}

public void Configuration(IAppBuilder app)
{
    var task = Task.Run(() => app.MapSignalR());
    task.Wait(300);
    //try again if it fails just to be sure ;)
    if (task.IsCanceled) Task.Run(() => app.MapSignalR()).Wait(300);
}