IIS killing ASPNET Core app

Question

I'm hosting an ASPNET Core 1.1 app on IIS with the following settings to keep it always running

However, I see the app getting terminated time to time. Before termination I see the following in the logs

2018-03-14 17:20:53.202 [Information] Request starting HTTP/1.1 POST http://127.0.0.1:32751/myapp/iisintegration  0
2018-03-14 17:20:53.205 [Information] Request finished in 3.98ms 202 
2018-03-14 17:20:53.203 [Error] Unhandled exception
System.Threading.Tasks.TaskCanceledException: A task was canceled.

The POST /iisintegration looks interesting. Is IIS sending a command to terminate the app?

P.S.

After digging around IIS integration middleware, it looks like that POST is actually IIS sending a termination command. This is the code that handles it

private static readonly PathString ANCMRequestPath = new PathString("/iisintegration");
...
    // Handle shutdown from ANCM
if (HttpMethods.IsPost(httpContext.Request.Method) &&
    httpContext.Request.Path.Equals(ANCMRequestPath) &&
    string.Equals(ANCMShutdownEventHeaderValue, httpContext.Request.Headers[MSAspNetCoreEvent], StringComparison.OrdinalIgnoreCase))
{
    // Execute shutdown task on background thread without waiting for completion
    var shutdownTask = Task.Run(() => _applicationLifetime.StopApplication());
    httpContext.Response.StatusCode = StatusCodes.Status202Accepted;
    return;
}

So my question is: Is there a way to disable this functionality?

Answer 1

Try to remove your Recycling Conditions from your application pool