Programming Tutorials

  Few things are more frustrating in serverless development than a successful deployment that results in zero active functions. You push your code. The build pipeline passes. The artifact lands in Azure. Yet, when you navigate to the portal or query the API, you see nothing. Digging into Application Insights or the Log Stream reveals the dreaded error: Microsoft.Azure.WebJobs.Script.Workers.Rpc.RpcException: Result: Failure Exception: ValueError: Worker failed to index functions This error is specific to the  Python V2 Programming Model . It indicates that the Azure Functions Host started your Python worker, but the worker failed to return a valid list of function triggers. Here is the root cause analysis and the solution to fix this blocking issue. Root Cause Analysis: The Indexing Phase To fix this, you must understand how the V2 model differs from V1. In the V1 model, the Azure Functions Host scanned  function.json  files in your directory structure to discover tr...