HTTP 错误 503。该服务在 IIS 中不可用？

Question

I published my Web Api (framework 4.5) in this path C:\\inetpub\\wwwroot\\MyWebAPI

In my IIS i converted this folder to an app

When i try to access this URL http://localhost/MyWebAPI/api/client/1 a message appears

Service Unavailable

HTTP Error 503. The service is unavailable.

Why?

My App Pool is set to be "STOP", i turn it on but it goes back to "STOP"

Answer 1

I found the solution

• Click on Application Pools under the tree with your machine name,
• on the right side, click click on Advanced Settings,
• in Process Model change the "Load User Profile" to false
• Start your application and restart your IIS

The error will surely change, in my case the error changed to this one

"Config Error: This configuration section cannot be used at this path. This happens when the section is locked at a parent level. Locking is either by default (overrideModeDefault="Deny"), or set explicitly by a location tag with overrideMode="Deny" or the legacy allowOverride="false"."

I have found the solution for this other problem here Config Error: This configuration section cannot be used at this path

Answer 2

This is a fairly old thread, but I stumbled across it with the same issue. For me, the resolution was to reset the App Pool user. I was starting the site, but the app pool would just stop. No logs, nothing. I recently had to change my windows password and the app pool user (me) was using the old password :-)

(note my website continued to work for a few days with the old password until I did an iisreset which is when the problem started)

Answer 3

Run the following commands in PowerShell in administrator mode.

1. Stop-Service -Force WAS
2. Remove-Item -Recurse -Force C:\\inetpub\\temp\\appPools*
   • If the above command not working, delete files manually.
3. Start-Service W3SVC

Answer 4

您可能会停止应用程序池，启动它，错误就会消失。