Issues running EventGridTrigger with func CLI or Azure

[TylerLeonhardt]

Investigative information

Please provide the following:

• Timestamp:
• Function App version (1.0 or 2.0): 2.0
• Function App name: jsazf-tyleonha
• Function name(s) (as appropriate): EventGridTrigger

Repro steps

Provide the steps required to reproduce the problem:

create a Node.js Function App then locally, run func init --worker-runtime node func new and select EventGrid Trigger func start

or publish it to Azure and run it in the Portal

Expected behavior

Function App starts correctly

Actual behavior

I get the following error:

func start

                  %%%%%%
                 %%%%%%
            @   %%%%%%    @
          @@   %%%%%%      @@
       @@@    %%%%%%%%%%%    @@@
     @@      %%%%%%%%%%        @@
       @@         %%%%       @@
         @@      %%%       @@
           @@    %%      @@
                %%
                %

Azure Functions Core Tools (2.1.725 Commit hash: 68f448fe6a60e1cade88c2004bf6491af7e5f1df)
Function Runtime Version: 2.0.12134.0
[10/24/18 5:37:14 AM] Building host: startup suppressed:False, configuration suppressed: False
[10/24/18 5:37:14 AM] Reading host configuration file '/Users/tyler/Code/JavaScript/jsazf-tyleonha/host.json'
[10/24/18 5:37:14 AM] Host configuration file read:
[10/24/18 5:37:14 AM] {
[10/24/18 5:37:14 AM]   "version": "2.0"
[10/24/18 5:37:14 AM] }
[10/24/18 5:37:14 AM] A host error has occurred
[10/24/18 5:37:14 AM] Microsoft.WindowsAzure.Storage: Settings must be of the form "name=value".
Listening on http://0.0.0.0:7071/
Hit CTRL-C to exit...
Settings must be of the form "name=value".
Application is shutting down...
[10/24/18 5:37:14 AM] Initialization cancellation requested by runtime.
Hosting environment: Production
Content root path: /Users/tyler/Code/JavaScript/jsazf-tyleonha
Now listening on: http://0.0.0.0:7071
Application started. Press Ctrl+C to shut down.
[10/24/18 5:37:15 AM] Stopping host...
[10/24/18 5:37:15 AM] Host shutdown completed.

In the Portal I get:

2018-10-24T05:33:43.754 [Information] Executing 'Functions.EventGridTrigger' (Reason='This function was programmatically called via the host APIs.', Id=518b3891-8058-4af9-afe3-0ead942b5511)
2018-10-24T05:33:44.037 [Error] Executed 'Functions.EventGridTrigger' (Failed, Id=518b3891-8058-4af9-afe3-0ead942b5511)
Unable to parse  to Newtonsoft.Json.Linq.JObject

Known workarounds

None at this time

Related information

Provide any related information

• Programming language used: Javascript
• Bindings used: EventGrid
  Source

extensions.csproj

<Project Sdk="Microsoft.NET.Sdk">
  <PropertyGroup>
    <TargetFramework>netstandard2.0</TargetFramework>
    <WarningsAsErrors></WarningsAsErrors>
    <DefaultItemExcludes>**</DefaultItemExcludes>
  </PropertyGroup>
  <ItemGroup>
    <PackageReference Include="Microsoft.Azure.WebJobs.Extensions.EventGrid" Version="2.0.0" />
    <PackageReference Include="Microsoft.Azure.WebJobs.Script.ExtensionsMetadataGenerator" Version="1.0.1" />
  </ItemGroup>
</Project>

local.settings.json

{
  "IsEncrypted": false,
  "Values": {
    "FUNCTIONS_WORKER_RUNTIME": "powershell",
    "AzureWebJobsStorage": "{AzureWebJobsStorage}"
  }
}

function.json

{
  "bindings": [
    {
      "type": "eventGridTrigger",
      "name": "eventGridEvent",
      "direction": "in"
    }
  ],
  "disabled": false
}

index.js

module.exports = async function (context, eventGridEvent) {
    context.log(typeof eventGridEvent);
    context.log(eventGridEvent);
};

[a-h]

I had to execute func azure functionapp fetch-app-settings <functionName> to get this running from here. It fills out the local.settings.json with values.

[a-h]

The issue is that the error message is not helpful, and that it happens in the first place. Why not just run the required CLI when you hit func start?

[a-h]

See https://github.com/Azure/azure-functions-host/issues/3835