Function host is not running.

Question

I had a Azure Function (v2) that was working.
Now I am getting a 

Function host is not running.

On Azure portal, I also got this error

Error:
Unauthorized - https:// NNNNNNNNNNN   .azurewebsites.net/admin/host/systemkeys/_master
Session Id: a784a3fdf6f44449a2d40fe3713a1699
Timestamp: 2018-09-04T14:37:06.075Z

Brazil South

Answer 1

This could be possibly due to the breaking changes released with the deployment of Azure Functions Runtime 2.0.

I suggest you, go through the Azure Functions Runtime 2.0 breaking changes and see if it helps to resolve your issue.

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Answer 2

Yes, it is very likely related. https://github.com/Azure/app-service-announcements/issues/129 has all the information you need to get passed that.

David

Answer 3

OK.

I upgraded the NuGet Package Microsoft.NET.Sdk.Functions  to  version 1.0.19

and put this on my host.json

{
  "version": "2.0"
}

Then I Published using Visual Studio 2017 and it is working.

Problem solved. Thank you!

Answer 4

Glad to hear that your issue is resolved.