How to Resolve HTTP Error 500.30: ANCM In-Process Start Failure in ASP.NET Core 2.2 with ABP?

Troubleshooting HTTP error 500.30: ANCM in-process startup failed

In ASP.NET Core 2.2, IIS in-process hosting significantly improves performance. However, enabling this feature in an ABP project may trigger HTTP error 500.30: ANCM in-process startup failed.

Compatibility issues with ABP

Unfortunately, this error usually occurs because the current version of ABP may not be fully compatible with the in-process hosting model. It's worth checking if ABP vNext supports in-process hosting.

ANCMV2 component requirements

Additionally, IIS in-process hosting relies on the ANCMV2 component. If the target deployment machine is missing ANCMV2, in-process hosting will fail. In this case, install the dotnet hosting package onto the machine, or downgrade to AspNetCoreModule.

Out-of-process hosting as an alternative

If in-process hosting is still a problem, consider switching to out-of-process hosting by modifying the web.config file as follows:

<code class="language-xml"><propertyGroup>
  <targetFramework>netcoreapp2.2</targetFramework>
  <aspNetCoreHostingModel>OutOfProcess</aspNetCoreHostingModel>
  <aspNetCoreModuleName>AspNetCoreModule</aspNetCoreModuleName>
</propertyGroup></code>

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