Deployment to Azure failing, need help debugging it

Question

I have an asp.net mvc 4 application, and I'm deploying it to Azure, It's deploying successfully but when I add a package from NuGet (Postal 0.8.2) it's breaking my deployment. I need help figuring out what's wrong so I can report the problem to the project.

When I deploy the app with that package the server keeps cycling:

10:10:39 AM - Instance 0 of role Biosign is creating the virtual machine

10:11:12 AM - Instance 0 of role Biosign is starting the virtual machine

10:12:50 AM - Instance 0 of role Biosign is in an unknown state

10:13:23 AM - Instance 0 of role Biosign is busy

10:17:06 AM - Instance 0 of role Biosign is cycling

If I check directly in the server with remote desktop I see this two errors repeating multiple times in Event Viewer (inside "Web Server (IIS)":

The application '/' belonging to site '1273337584' has an invalid AppPoolId 'aef747de-29d0-4deb-8beb-84765ef61887' set. Therefore, the application will be ignored.

Site 1 was disabled because the root application defined for the site is invalid. See the previous event log message for information about why the root application is invalid.

I also see this Application Error in Event Viewer:

Faulting application name: WaHostBootstrapper.exe, version: 2.0.1196.19, time stamp: 0x514bb531 Faulting module name: ntdll.dll, version: 6.2.9200.16420, time stamp: 0x505ab405 Exception code: 0xc0000374 Fault offset: 0x00000000000ea485 Faulting process id: 0x67c Faulting application start time: 0x01ce5aedc740e826 Faulting application path: E:\base\x64\WaHostBootstrapper.exe Faulting module path: D:\Windows\SYSTEM32\ntdll.dll Report Id: 0be8db8b-c6e1-11e2-93ef-00155d44b470 Faulting package full name: Faulting package-relative application ID:

The strange thing is that if I open the app in the server it seems to be working.

Answer 1

Create a local virtual machine and install an evaluation version of Visual Studio Ultimate. Debug with IntelliTrace on Azure. Intellitrace is the first place to start with roles that don't start — unfortunately it is only available in the ultimate version of Visual Studio.

Answer 2

I have same error:

IIS log

The application '/' belonging to site '1273337584' has an invalid AppPoolId '3f3649d0-fa6f-4244-8d28-d9e7b904bd0f' set. Therefore, the application will be ignored.

Application Logs

System.IO.FileNotFoundException: Could not load file or assembly 'System.Web.Http' System.IO.FileNotFoundException: Could not load file or assembly 'System.Web.Http.WebHost'

Fixed adding System.Web.Http.dll and System.Web.Http.WebHost.dll (Copy Local in VS)!

Answer 3

Hope this helps someone:

I struggled with this error long time too, and finally find a solution. What caused the error in my case was that one DLL I was using, was in 32-bit but IIS in Azure requires 64-bit DLLs to be used by default. Of course it's possible to set AppPool to accept 32-bit libraries. This didn't worked in my case. Only thing which helped, was to use 64-bit DLLs in web appl.

Bw, Sami