IIS and NET Core HTTP Error 500.30 - ANCM In-Process Start Failure .net core 3.1

Question

I've created application in .NET Core from template - with Angular and Authentication. .NET Core 3.1 In Properties->Debug-> for IIS profile I've setup Hosting Model as Out of process. But in Web.config I have still inprocess. I've installed ASP Core Runtime from this site: https://dotnet.microsoft.com/download/dotnet/current When I run my project as IIS Express it works. But when I copy published files to the IIS folder I have error:

HTTP Error 500.30 - ANCM In-Process Start Failure
Common solutions to this issue:
The application failed to start
The application started but then stopped
The application started but threw an exception during startup
Troubleshooting steps:
Check the system event log for error messages
Enable logging the application process' stdout messages
Attach a debugger to the application process and inspect
For more information visit: https://go.microsoft.com/fwlink/?LinkID=2028265 

I've tried many resolution from the internet because error is well known, but without result.

My dotnet info:

C:\tasks\TestApp\WebApplication2\WebApplication2>dotnet --info
.NET Core SDK (reflecting any global.json):
 Version:   3.1.300
 Commit:    b2475c1295

Runtime Environment:
 OS Name:     Windows
 OS Version:  10.0.17763
 OS Platform: Windows
 RID:         win10-x64
 Base Path:   C:\Program Files\dotnet\sdk\3.1.300\

Host (useful for support):
  Version: 3.1.4
  Commit:  0c2e69caa6

.NET Core SDKs installed:
  1.1.0 [C:\Program Files\dotnet\sdk]
  2.0.2 [C:\Program Files\dotnet\sdk]
  2.1.4 [C:\Program Files\dotnet\sdk]
  2.1.202 [C:\Program Files\dotnet\sdk]
  2.1.507 [C:\Program Files\dotnet\sdk]
  2.1.508 [C:\Program Files\dotnet\sdk]
  2.2.103 [C:\Program Files\dotnet\sdk]
  3.0.100 [C:\Program Files\dotnet\sdk]
  3.1.300 [C:\Program Files\dotnet\sdk]

.NET Core runtimes installed:
  Microsoft.AspNetCore.All 2.1.11 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.All]
  Microsoft.AspNetCore.All 2.1.12 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.All]
  Microsoft.AspNetCore.All 2.1.18 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.All]
  Microsoft.AspNetCore.All 2.2.1 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.All]
  Microsoft.AspNetCore.App 2.1.11 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 2.1.12 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 2.1.18 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 2.2.1 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 3.0.0 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 3.1.4 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.NETCore.App 1.0.5 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 1.1.2 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 2.0.0 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 2.0.5 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 2.0.9 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 2.1.11 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 2.1.12 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 2.1.18 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 2.2.1 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 3.0.0 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 3.1.4 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.WindowsDesktop.App 3.0.0 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
  Microsoft.WindowsDesktop.App 3.1.4 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]

To install additional .NET Core runtimes or SDKs:
  https://aka.ms/dotnet-download

---

I've changed InProcess to OutOfProcess, now my config looks like:

<system.webServer>
    <handlers>
      <add name="aspNetCore" path="*" verb="*" modules="AspNetCoreModuleV2" resourceType="Unspecified" />
    </handlers>
    <aspNetCore processPath="dotnet" arguments=".\WebApplication2.dll" stdoutLogEnabled="false" stdoutLogFile=".\logs\stdout" hostingModel="OutOfProcess" />
  </system.webServer>

And I get error:

An error occurred while starting the application.

Answer 1

After heading whole 1 day I find a great solution, please the following point :-

1. go to your project folder via cmd.
2. type dotnet publish --e/:output (note this will publish the code in e drive output folder)
3. go to output folder via cmd
4. type dotnet <project-name.dll> (this will run the application in localhost:5003)
5. If any issue occur with above step this will show in the cmd, I had faced the issue of, where one folder is missing. Once I added the folder the issue resolved.

Answer 2

You can just edit your web.config inside of your ASP.NET Core application folder. By default it is inside of wwwroot folder.

Change the value of AspNetCoreHostingModel or hostingModel to OutOfProcess.

<?xml version="1.0" encoding="utf-8"?> 
<configuration> 
  <location path="." inheritInChildApplications="false"> 
    <system.webServer>
      <handlers> 
        <add name="aspNetCore" path="" verb="" modules="AspNetCoreModule" resourceType="Unspecified" /> 
      </handlers> 
      <aspNetCore processPath=".\fad.exe" stdoutLogEnabled="false" stdoutLogFile=".\logs\stdout" hostingModel="OutOfProcess" /> 
    </system.webServer> 
  </location> 
</configuration> 
<!--ProjectGuid: 4904ffb5-a4a6-4e5a-bc46-51d1171d82b0-->

Answer 3

Did you notice that your publish profile is displayed as

So please go to the root folder of your project and open .csproj with notepad.

Then modify <AspNetCoreHostingModel>InProcess</AspNetCoreHostingModel>

to

<AspNetCoreHostingModel>OutOfProcess</AspNetCoreHostingModel>

and re-publishing.

Or you can try to modify publish profile from <MSDeployPublishMethod>InProcess</MSDeployPublishMethod> to <MSDeployPublishMethod>OutofProcess</MSDeployPublishMethod> Then modify

hostingModel="inprocess" to hostingModel="OutOfProcess" from your asp.net core handler in IIS web.config.

Answer 4

Now I know that project generated by dotnet command works:

dotnet new mvc
dotnet restore
dotnet build
dotnet publish

and when I copy files from publish folder to folder wwwroot/myapp it works But when I open this project in Visual Studio and save project, it creates .sln file. Then I publish from Visual Studio and it doesn't work. What is the difference between publish by dotnet and publish by Visual Studio?