IHostedService停止，没有任何原因 [英] IHostedService Stop without any reason

问题描述

有人可以向我解释为什么我的服务器无缘无故停止吗? 在我的IHostedService实现下面:

Could anyone explain to me why my server stopped for no reason? below my IHostedService implementation:

public class HostServiceBox : IHostedService
    {
        public Task StartAsync(CancellationToken cancellationToken)
        {
            return Task.Run(() =>
            {
                DomonutyBoxBusiness.StartBoxListening(); //STARTUP Box listening

                while (true)
                {
                    Logging.Info(DateTime.Now + " HostServiceBox Running");
                    Thread.Sleep(10000);
                }
            }, cancellationToken);
        }

        public Task StopAsync(CancellationToken cancellationToken)
        {
            Logging.Info(DateTime.Now + " StopAsync");

            //TODO impplement a Stop litening all boxes
            throw new NotImplementedException();
        }
    }

这是我的日志?

    .....
2/24/2018 8:31:27 PM HostServiceBox Running
2/24/2018 8:32:27 PM HostServiceBox Running
2/24/2018 8:33:27 PM HostServiceBox Running
2/24/2018 8:34:27 PM HostServiceBox Running  <------
2/25/2018 11:22:07 AM HostServiceBox Running <-----
2/25/2018 11:23:07 AM HostServiceBox Running
2/25/2018 11:24:07 AM HostServiceBox Running
2/25/2018 11:25:07 AM HostServiceBox Running
......

在使用红k(.Net Core)的IIS上看起来像我的方法睡觉了吗?为什么?

is look like on IIS with kestrel (.Net Core) my method slept ? Why?

通常我重新启动 while(true)是因为我调用了API.但是 IHostedService 是后台任务，它不应该停止吗?

Usualy my while(true) restart because i call the API. But IHostedService is a background task it's shouldnt stop right?

github

推荐答案

用户tym32167处于正确的轨道.在

User tym32167 is on the right track. This is mentioned in the documentation for IHostedService in the section on deployment:

在IIS或常规Azure应用服务上，由于应用程序池回收，可以关闭您的主机

on IIS or a regular Azure App Service, your host can be shut down because of app pool recycles

IIS应用程序池的默认空闲超时为20分钟，并且它们的默认应用程序池回收时间为29小时.通常，您希望将空闲超时设置为零(禁用)，并将回收设置为固定的时间，以使危害最小.

IIS app pools have a default idle-timeout of 20 minutes, and they also have a default app pool recycle time of 29 hours. Typically you want to set the idle timeout to zero (disabled) and the recycle to a fixed time where it will do the least harm.

有一篇有趣的博客文章，介绍了他们为什么选择29小时此处，它还涵盖了空闲超时.

There's an interesting blog post about why they chose 29 hours here and it also covers idle timeout.

此外，如果您碰巧要部署到Azure，则前面链接的文章建议了其他可以真正全天候运行的部署方式(容器，WebJob等).

Also, if you happen to be deploying to Azure, that article linked earlier suggests other ways to deploy that will truly run full-time (containers, WebJobs, etc).

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