Topshelf timeout issue | 易学教程

问题

We are using Topshelf to host a service. Before starting the service, we are making database call to load lot of data. Because of this, while starting the service, we are getting following error:

Start Service failed with return code '[7] ServiceRequestTimeout

We are using following code to start the service:

HostFactory.Run(x =>
            {
                x.Service<AppService>(s =>
                {
                    s.ConstructUsing(name => new AppService(s_resolver, baseAddress, resolver));
                    s.WhenStarted(svc => svc.Start());
                    s.WhenStopped(svc => svc.Stop());
                    s.WhenShutdown(svc => svc.Shutdown());
                });

                x.EnableShutdown();
                x.RunAsLocalService();
                x.StartAutomatically();
                x.SetDisplayName("Application Host");
                x.SetDescription("Application Host");
            });

If I try to launch the service using Visual Studio, service runs fine. But when the service is hosted through Topshelf, I am getting time out error.

I have also tried using hostControl.RequestAdditionalTime(TimeSpan.FromSeconds(300)) but even after adding additional timeout period, I am not able to resolve the issue. Please provide your suggestions.

回答1:

What the documentation for HostControl.RequestAdditionalTime fails to state is that you can only ask for a max of 60 or 120 seconds. Otherwise it ignores your request.

It's brilliantly documented absolutely no where that I'm aware of :( If you find it documented some where, please let me know.

回答2:

Here be Dragons

from TopShelf

void HostControl.RequestAdditionalTime(TimeSpan timeRemaining)
    {
        _log.DebugFormat("Requesting additional time: {0}", timeRemaining);

        RequestAdditionalTime((int)timeRemaining.TotalMilliseconds);
    }

And here is JustDecompile from ServiceBase

    /// <summary>Requests additional time for a pending operation.</summary>
    /// <param name="milliseconds">The requested time in milliseconds.</param>
    /// <exception cref="T:System.InvalidOperationException">The service is not in a pending state.</exception>
    [ComVisible(false)]
    public void RequestAdditionalTime(int milliseconds)
    {
        unsafe
        {
            fixed (NativeMethods.SERVICE_STATUS* sERVICESTATUSPointer = &this.status)
            {
                if (this.status.currentState != 5 && this.status.currentState != 2 && this.status.currentState != 3 && this.status.currentState != 6)
                {
                    throw new InvalidOperationException(Res.GetString("NotInPendingState"));
                }
                this.status.waitHint = milliseconds;
                this.status.checkPoint = this.status.checkPoint + 1;
                NativeMethods.SetServiceStatus(this.statusHandle, sERVICESTATUSPointer);
            }
        }
    }

来源：https://stackoverflow.com/questions/19589686/topshelf-timeout-issue

标签

.net

windows-services

topshelf