azure-functionsazure-durable-functions

Durable Functions Error: Can't determine project language from files

I am using durable function to setup a process where I am calling 6 functions at once and post it's success I need to execute a proc. This is already setup using Logic Apps, but sometimes the functions takes more than 2 mins and thus it restarts so we are moving to durable functions. I have already gone through the Microsoft's Documentation on durable function for python, and it is working as expected on local.

I have the trigger enter image description here

Output post triggering

enter image description here enter image description here

But when doing the same for my actual durable functions that I needed to create I am getting below errors: It's not able to recognize the language enter image description here

Even after I pass it, it's still not able to figure out the Azure Storage connection enter image description here

PS: I have created a temp storage in azure and using the same in both.

EDIT[1]:

Function Activity

def main(url: str) -> str:
    """Trigger the function url"""
    resp = requests.get(url)
    if resp.status_code in (200, 201):
        return True
    return False

Function Orchestrator

def orchestrator_function(context: DurableOrchestrationContext):
    FUNC_NAMES = os.environ['TBL_FUNCTIONS']

    tasks = []
    for name in FUNC_NAMES:
        tasks.append(context.call_activity('CWFunctionActivity', os.environ[name]))

    results = yield context.task_all(tasks)
    if all(results):
        result = yield context.call_activity('CWFunctionActivity', os.environ['FORECAST_DATASET_PROC'])
    else:
        result = "Check the function execution logs"

    return result

Function HTTP Starter

async def main(req: HttpRequest, starter: str) -> HttpResponse:
    client = DurableOrchestrationClient(starter)
    instance_id = await client.start_new(req.route_params["functionName"], None, None)

    logging.info(f"Started orchestration with ID = '{instance_id}'.")

    return client.create_check_status_response(req, instance_id)

local.settings.json

    {
        "IsEncrypted": false,
          "Values": {
            "AzureWebJobsStorage": "storage_connection_string",
            "FUNCTIONS_WORKER_RUNTIME": "python",
            "TBL_FUNCTIONS": "['item1', 'item2', 'item3']",
            /*
            "TBL_FUNCTIONS": [
              "TBL_CHARGE_CODES",
              "TBL_EXPENSES",
              "TBL_MEMBERS",
              "TBL_PROJECTS",
              "TBL_PROJECT_TICKETS",
              "TBL_TIME_ENTRIES"
            ],
        */
        "TBL_CHARGE_CODES" : "corresponding_http_url",
        "TBL_EXPENSES": "corresponding_http_url",
        "TBL_MEMBERS" : "corresponding_http_url",
        "TBL_PROJECTS": "corresponding_http_url",
        "TBL_PROJECT_TICKETS": "corresponding_http_url",
        "TBL_TIME_ENTRIES": "corresponding_http_url"
        }
}
Solution

  • When I tried the same in my environment with your code, I got the same error.

    This seems to be due to the configuration of environment variables in local.settings.json.

    Resolution:

    I have modified the code in local.settings.json as below and it worked.

    local.settings.json:

    {
  "IsEncrypted": false,
  "Values": {
    "FUNCTIONS_WORKER_RUNTIME": "python",
    "AzureWebJobsStorage": "UseDevelopmentStorage=true",
    "TBL_FUNCTIONS:[0]:TBL_CHARGE_CODES" : "corresponding_http_url",
    "TBL_FUNCTIONS:[0]:TBL_EXPENSES": "corresponding_http_url",
    "TBL_FUNCTIONS:[0]:TBL_MEMBERS" : "corresponding_http_url",
    "TBL_FUNCTIONS:[0]:TBL_PROJECTS": "corresponding_http_url",
    "TBL_FUNCTIONS:[0]:TBL_PROJECT_TICKETS": "corresponding_http_url",
    "TBL_FUNCTIONS:[0]:TBL_TIME_ENTRIES": "corresponding_http_url"
    }         
}

    enter image description here

    References:

    How to set an array value in local.settings.json file in azure functions - Stack Overflow