Missing value for AzureWebJobsStorage in local.settings.json local development in Visual Studio 2017

Question

I'm developing a azure function locally, with the Storage Emulator and de Storage Explorer opened.

File tree

local.settings.json

{
  "IsEncrypted": false,
  "Values": {
    "AzureWebJobsStorage": "UseDevelopmentStorage=true",
    "AzureWebJobsDashboard": "UseDevelopmentStorage=true"
  },
  "ConnectionStrings": {
    "PlantaoEntities": {
      "ConnectionString": "CENSORED",
      "ProviderName": "System.Data.EntityClient"
    }
  }
}

But a receives the following message when trying to run the code:

Missing value for AzureWebJobsStorage in local.settings.json. This is required for all triggers other than HTTP. You can run 'func azure functionapp fetch-app-settings ' or specify a connection string in local.settings.json

It's was working before a rebuild solution, and if I try func azure functionapp fetch-app-settings <functionAppName> it try to retrieve the information from the azure portal itself.

Answer 1

I was getting the same error when I was running my Azure Function in my Visual Studio 2019.

I had already set the Copy To Output Directory action to Copy always and I was still getting the same error. The issue is that the Azure Function local.settings.json file doesn't support nested json. You can track this issue here.

I was having values in local.settings.json as preceding.

{
  "IsEncrypted": false,
  "Values": {
    "Custom": {
      "Tickets": {
        "Channels": [
          "One",
          "Two"
        ]
      }
    },
    "AzureWebJobsStorage": "",
    "FUNCTIONS_WORKER_RUNTIME": "dotnet",
    "ServiceBusConnectionString": ""
  }
}

As you can see that there is an extra nested json (Custom) object inside Values, that is the reason why I was getting this error. To fix this, I had to add a new configuration file called configuration.json and add my custom values there.

"Custom": {
      "Tickets": {
        "Channels": [
          "One",
          "Two"
        ]
      }
    }

The fix is to use either the ConfigurationBuilder or read that file using File.ReadAllText. You can also add the entire JSON as a plain string in the local.settings.json instead of a JSON object.

Hope it helps.

Answer 2

The solution was to right-click on local.settings.json, go to properties, change "Copy to Output directory" from "Do not copy" to "Copy always". Now the CLI picks up the settings when running from within Visual Studio 2017.

https://github.com/Azure/azure-functions-core-tools/issues/223#issuecomment-326225219

Answer 3

FYI, you also get this error when the value for "AzureWebJobsStorage" is effectively empty (""). You can set it to e.g. "UseDevelopmentStorage=true" for development.

Be aware, this requires the storage emulator installed locally. See the docs.

Answer 4

Just saw this error on VS2019 and resolved it by reordering the local.settings.json so that the IsEncrypted value was after the "Values"

{
   "Values": {
        "AzureWebJobsStorage": "removed",
      },
   "IsEncrypted": false
}

Answer 5

For anyone that may have encountered this and scratched their heads because they didn't have nested JSON and had their <ItemGroup> values correct, this may help you. Since local.settings.json is ignored, I had copied one over using the file system, and though Visual Studio for Mac was showing it in the solution explorer it was apparently not picking it up no matter what I changed <CopyToOutputDirectory> to. After closing and reopening my solution the issue went away.

Answer 6

Same error appears when your local.settings.json file has a json error, e.g. to following commas ,,.

Answer 7

Solution - Azure Functions Node.js/Typescript (VSCODE)

This solution is for local development. Be aware, this requires the storage emulator installed locally. See the docs.

1.) From your project root, open local.settings.json and update the AzureWebJobsStorage value from "" to UseDevelopmentStorage=true.

example: "AzureWebJobsStorage": "UseDevelopmentStorage=true",

2.) Restart Function App

Example local.setting.json

{
  "IsEncrypted": false,
  "Values": {
    "AzureWebJobsStorage": "UseDevelopmentStorage=true"
    "FUNCTIONS_WORKER_RUNTIME": "node",
    "AZURE_STORAGE_CONNECTION": "Optional_your_remote_storage_string_in_azure"
    "AZURE_STORAGE_CONTAINER_NAME": "optional_remote_container_name"
  },
  "Host": {
    "LocalHttpPort": 7071,
    "CORS": "*",
    "CORSCredentials": false
  }
}

Answer 8

In case any of the above solutions aren't working for people who require nested JSON in their local.settings.json, just flatten the nested objects as so:

This:

"Config": {
 "MyCusomValue": "Value"
}  

Becomes:

"Config:MyCustomValue": "Value"

Answer 9

Update the local setting as below

{
  "Values": 
  {
  "AzureWebJobsStorage": "DefaultEndpointsProtocol=`connection string of a blob storage`",
  "FUNCTIONS_WORKER_RUNTIME": "python"
  },
  "IsEncrypted": false
}

Excample connection

string=https;AccountName=xxx;AccountKey=xxxxxxx==;EndpointSuffix=core.windows.net

Answer 10

For me I found this file to be very finicky so I set it back to the way it was created by VS2019 and added my own configuration as has been suggested above.

Answer 11

For me, I was missing a closing quote on one of my values. As soon as I fixed that, everything worked.

Answer 12

I just encounter same issue with Intellij Idea (didn't wanted to move on VSCode). I just had to download Azure Core tools depending on my system (Windows, forced by the client -_-) on :

https://docs.microsoft.com/en-us/azure/azure-functions/functions-run-local?tabs=windows%2Ccsharp%2Cbash

Then edit the launch config, adding in App settings key :

AzureWebJobsStorage

And in App settings value :

UseDevelopmentStorage=true

Have fun.

Answer 13

I know the question is related to Visual Studio, but I could fix the error by doing the following in Visual Studio Code:

1. Install the "Azurite" extension
2. Press F1 and type Azurite: Start
3. Debug your Azure Function as usual (by pressing F5)

For more details see the official documentation for Azurite

Answer 14

I fixed this issue finally, it is because of your config files like local.settings.json or appsettings.json show any warning messages then it will fail to load the settings.