IIS是否会回收asp.net核心进程？

Question

I need to run long running background tasks in my asp.net core application. I know of Azure Webjobs and other out of process techniques but I'd rather keep the solution simple and runs those tasks directly in the asp.net core process. I use Kestrel and the application is hosted in IIS.

I understand that IIS will occasionally recycle the IIS process. Will it also recycle the asp.net core process?

Answer 1

Asp.Net Core < 2.2

Asp.net Core runs in a separate process dotnet.exe even when it is hosted in IIS . But it doesn't mean that it runs as an independent process. IIS still responsible for Asp.net core process ( dotnet.exe ) life cycle through the AspNetCoreModule .

So, answer is yes, IIS will also recycle the asp.net core process

Asp.Net Core >= 2.2

Asp.Net Core 2.2 has in-process hosting support on IIS in addition to out-of-process hosting model that was before. It seems it is just an optimization that allows to avoid the additional cost of reverse-proxying requests over to a separate dotnet process. IIS will recycle application pool with Asp.net Core application

Answer 2

I have do a experiment use ' IApplicationLifetime applicationLifetime ' like aspnet Golbal.aspx

When the iis application recycle , the registerd 'ApplicationStopping' be triggered.

SO i will belive the https://github.com/aspnet/KestrelHttpServer/issues/1040#issuecomment-267506588

Answer 3

Nope, It would not. IIS application pool only takes care of w3wp.exe process.

ASP.NET Core is hosted by Kestrel process, and IIS is just a reverse proxy in front of it.