NET10 + IIS (InProcess with Preload Enabled) causes Windows to hang during shutdown #65436
Description
Is there an existing issue for this?
- I have searched the existing issues
Describe the bug
When using .NET 10 with IIS (InProcess with Preload Enabled = True), Windows hangs during shutdown / restart because IIS AspNetCore Module V2 gets stuck in a stop / start loop.
Expected Behavior
When using .NET 10 with IIS (InProcess with Preload Enabled = True), Windows should not hang during shutdown / restart.
Steps To Reproduce
See super simple repo: https://github.com/BlaineM-SeriouslyRAD/20260215-aspnetcore-issue/tree/main
The readme has the steps to reproduce.
Exceptions (if any)
Event Viewer (Informational Messages):
IIS AspNetCore Module V2 Event IDs 1032 and 1033 infinite loop
https://github.com/BlaineM-SeriouslyRAD/20260215-aspnetcore-issue/blob/main/Event%20Viewer.png
.NET Version
10.0.103
Anything else?
Windows Versions Affected
- Windows 11 25H2 (OS Build 26200.7623)
- Windows Server 2022 21H2 (OS Build 20348.4773)
- Windows Server 2019 1809 (OS Build 17763.8389)
Known Workarounds
- Disable Preload (unworkable)
- Change hosting model to outofprocess (web.config)
- Revert to .NET 8 (net10.0 -> net8.0 in csproj and web.config)