ASP.. NET Core MVC应用请求永远不会完成

我正在尝试托管一个ASP。. NET Core MVC项目在单核Windows Server 2012主机上。我用的是ASP。.NET Core MVC 1.0.0，在iis8和。NET Framework 4.6.1上运行应用程序在最初的10分钟内工作正常，然后突然服务器停止响应。

一开始我以为是数据库端死锁，所以我在DbContext类中添加了日志记录:

private static long ActiveContextCount = 0;
private ILogger _log;
private Stopwatch _timer = new Stopwatch();
private Guid _contextId = Guid.NewGuid();
public BlogContext(string nameOrConnectionString, ILoggerFactory logger)
        :base(nameOrConnectionString)
{
    _log  = logger.CreateLogger<BlogContext>();
    Database.Log = l =>
    {
        _log.LogInformation(l);
    };
    ActiveContextCount++;
    _timer.Start();
    _log.LogInformation("BlogContext created. GUID:{0}, Active count {1}", _contextId, ActiveContextCount);
}
protected override void Dispose(bool disposing)
{
    ActiveContextCount--;
    _timer.Stop();
    _log?.LogInformation("BlogContext Disposed. GUID:{0}, Live time: {1}ms, Active count {2}", _contextId, _timer.ElapsedMilliseconds, ActiveContextCount);
    base.Dispose(disposing);
}

我正在使用实体框架6，我已经设置了DbContext的范围:

services.AddScoped(p => new BlogContext(_dataDbConnectionString, p.GetRequiredService<ILoggerFactory>()));

结果表明，DB操作都工作正常。我在日志中跟踪请求，注意到一些请求的最后日志为:

[Information] Executing ViewResult, running view at path "/Views/Blog/Details.cshtml".

并且永远不会完成(即在日志中找不到dispose)。从那时起，ActiveContextCount只会堆积到几百个，整个应用程序会挂起并停止响应。

(EDIT 08/29)另一个例子，甚至没有执行任何查询:

[Information] Request starting HTTP/1.1 GET http://myapp/  
[Information] UsersContext created. GUID:bb7743b9-7999-4a01-819f-3d239d34d4d9, Active count 7
[Information] HttpContext.User merged via AutomaticAuthentication from authenticationScheme: "Identity.Application".
[Information] BlogContext created. GUID:8c7505d4-5c87-428e-ad56-12f35f54aadc, Active count 6
[Information] Executing action method "MyApp.Controllers.HomeController.Index (MyApp)" with arguments (["1"]) - ModelState is Valid
[Information] Executing ViewResult, running view at path "/Views/Home/Index.cshtml".

我在这一点上卡住了。为什么视图结果永远不会结束?这是一个bug在框架或我的应用程序?即使存在错误，为什么不在超时后中止并放弃请求呢?我试图在web中指定超时时间。配置但没有帮助:

<aspNetCore processPath=".'MyApp.exe" arguments="" forwardWindowsAuthToken="false" stdoutLogEnabled="false" stdoutLogFile=".'logs'stdout" requestTimeout="00:00:40" />

如何进一步调试此问题?

var result = htmlHelper.RenderPartialAsync(partialViewName, htmlHelper.ViewData.Model, viewData);
result.GetAwaiter().GetResult();