StartMode=AlwaysRunning does not work unless you change garbage collection settings

[unionthugface]

The suggestions mentioned in the document for the Application Initialization Module that allegedly make a .NET Core app restart after shutdown in IIS (StartMode=AlwaysRunning and IdleTimeout=0) are not sufficient by themselves. With these settings, an app will get to the end of the application lifetime and still shut down without restarting; a hard recycle of the app will likewise shut the app down without restarting it. The missing component for me was changing the garbage collection settings:

<PropertyGroup>
    <ServerGarbageCollection>true</ServerGarbageCollection>
    <ConcurrentGarbageCollection>false</ConcurrentGarbageCollection>
</PropertyGroup>

See issues:
dotnet/aspnetcore#3849
dotnet/aspnetcore#19509

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Document Details

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• ID: ec484002-18c1-6a0d-00de-820d56f038d3
• Version Independent ID: 7903ce53-2cbb-f083-7479-c8abc30211a0
• Content: Host ASP.NET Core on Windows with IIS
• Content Source: aspnetcore/host-and-deploy/iis/index.md
• Product: aspnet-core
• Technology: aspnetcore-hostdeploy
• GitHub Login: @Rick-Anderson
• Microsoft Alias: riande

[Rick-Anderson]

Let's keep the issue in dotnet/aspnetcore#19509 until it's verified

[katraf]

The garbage collection solution did not help me. The issue was fixed only after enabling anonymous authentication.