问题
I am running an ASP.NET 5 project in an Azure Web App.
When calling on an API endpoint with a file (form-data) of about 1.5mb or larger, I get a 502 Bad Gateway with the follow message in the reponse body:
The specified CGI application encountered an error and the server terminated the process.
The strange thing is that when uploading a smaller file, the call works fine. It seems to produce the 502 at around the 1.5mb mark, but it's not entirely consistent.
I am using ASP.NET 5 RC1.
In Startup.cs, I have app.UseIISPlatformHandler(); as the first middleware addition in the Configure() method.
project.config:
{
...
"webroot": "wwwroot",
"dependencies": {
"Microsoft.ApplicationInsights.AspNet": "1.0.0-rc1",
"Microsoft.AspNet.Mvc": "6.0.0-rc1-final",
"Microsoft.AspNet.Server.Kestrel": "1.0.0-rc1-final",
"Microsoft.AspNet.Diagnostics": "1.0.0-rc1-final",
"Microsoft.AspNet.Authorization": "1.0.0-rc1-final",
"Microsoft.AspNet.Mvc.Core": "6.0.0-rc1-final",
"Microsoft.AspNet.Mvc.Abstractions": "6.0.0-rc1-final",
"Microsoft.AspNet.Authentication.JwtBearer": "1.0.0-rc1-final",
"Microsoft.Extensions.PlatformAbstractions": "1.0.0-rc1-final",
"Microsoft.AspNet.StaticFiles": "1.0.0-rc1-final",
"Microsoft.Extensions.Logging": "1.0.0-rc1-final",
"Microsoft.Extensions.Logging.Abstractions": "1.0.0-rc1-final",
"Microsoft.Extensions.Configuration": "1.0.0-rc1-final",
"Microsoft.Extensions.Configuration.Json": "1.0.0-rc1-final",
"Microsoft.Extensions.Configuration.EnvironmentVariables": "1.0.0-rc1-final",
"Newtonsoft.Json": "6.0.6",
"WindowsAzure.Storage": "5.0.2",
"Microsoft.AspNet.IISPlatformHandler": "1.0.0-rc1-final",
...
},
"commands": {
"web": "Microsoft.AspNet.Server.Kestrel"
},
"frameworks": {
"dnx451": { }
},
}
EDIT:
As suggested by Jessevl, the following exception is being thrown:
System.IO.InvalidDataException: Unexpected end of request content at Microsoft.AspNet.Server.Kestrel.Http.MessageBody.ForContentLength.d__3.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at Microsoft.AspNet.WebUtilities.FileBufferingReadStream.d__27.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at Microsoft.AspNet.WebUtilities.BufferedReadStream.d__39.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at Microsoft.AspNet.WebUtilities.MultipartReaderStream.d__36.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at Microsoft.AspNet.WebUtilities.StreamHelperExtensions.d__0.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd(Task task) at Microsoft.AspNet.Http.Features.Internal.FormFeature.d__12.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at Microsoft.AspNet.Mvc.ModelBinding.FormValueProviderFactory.d__1.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at Microsoft.AspNet.Mvc.ModelBinding.CompositeValueProvider.d__2.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd(Task task) at Microsoft.AspNet.Mvc.Controllers.FilterActionInvoker.d__49.MoveNext() --- End of stack trace from previous location where exception was thrown --- at Microsoft.AspNet.Mvc.Controllers.FilterActionInvoker.d__44.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at Microsoft.AspNet.Mvc.Infrastructure.MvcRouteHandler.d__6.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at Microsoft.AspNet.Mvc.Routing.InnerAttributeRoute.d__10.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at Microsoft.AspNet.Routing.RouteCollection.d__9.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at Microsoft.AspNet.Builder.RouterMiddleware.d__4.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at Microsoft.ApplicationInsights.AspNet.RequestTrackingMiddleware.d__4.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at Microsoft.AspNet.IISPlatformHandler.IISPlatformHandlerMiddleware.d__8.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at Microsoft.AspNet.Hosting.Internal.RequestServicesContainerMiddleware.d__3.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at Microsoft.AspNet.Hosting.Internal.HostingEngine.<>c__DisplayClass32_0.d.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at Microsoft.AspNet.Server.Kestrel.Http.Frame.d__79.MoveNext()
回答1:
There seems to be some sort of issue with the current release of Asp.Net 5 where the error returned when running in an Azure Web App will always be
The specified CGI application encountered an error and the server terminated the process.
regardless of what the actual error is. I, for example, got this error when I had an incorrect connection string to Azure Event Hub somewhere in my code.
You could try remote debugging (see here) or simply scan your logs using Kudu, which you can find on [websitename].scm.azurewebsites.net (replace [websitename] with what would normally be in [websitename].azurewebsites.net), or Visual Studio server explorer.
Jesse
来源：https://stackoverflow.com/questions/34416996/asp-net-5-rc1-bad-gateway-the-specified-cgi-application-encountered-an-error