AWS Step Functions State Machine scenarios with 'Activity scenarios: no response from worker' despite successful task completion
I keep running into I'm building a feature where I'm working through a tutorial and I've looked through the documentation and I'm still confused about I'm currently implementing an AWS Step Functions state machine to orchestrate a series of tasks, where one task is an activity that communicates with a Lambda function..... The activity is defined to wait for the response from the worker, which in this case is my Lambda function. However, I keep working with the behavior: `Activity failed: no response from worker` even though the Lambda function appears to execute successfully and returns the expected results. Here’s the relevant part of my Step Functions definition: ```json { "Comment": "A Hello World example of the Amazon States Language", "StartAt": "ProcessData", "States": { "ProcessData": { "Type": "Task", "Resource": "arn:aws:lambda:us-east-1:123456789012:function:myFunction", "HeartbeatSeconds": 300, "TimeoutSeconds": 600, "ResultPath": "$.result", "Next": "Done" }, "Done": { "Type": "Succeed" } } } ``` I've verified that my Lambda function is properly configured for the event it receives and it logs the output correctly to CloudWatch. So far, I’ve tried increasing the `TimeoutSeconds` and even the `HeartbeatSeconds`, but the behavior continues. The Lambda function is invoked as expected, and I can see the logs confirming successful execution, but for some reason, Step Functions doesn’t seem to receive the results back. Here’s a snippet from my Lambda handler: ```python import json def lambda_handler(event, context): # Simulate some processing return { 'statusCode': 200, 'body': json.dumps('Processing complete!') } ``` I’ve also ensured that the IAM roles have the necessary permissions, including `lambda:InvokeFunction`. Any insights into what could be causing this miscommunication between the Step Functions and the Lambda function would be greatly appreciated! I'm working on a application that needs to handle this. My development environment is Ubuntu 22.04. I'd be grateful for any help. I recently upgraded to Python latest. Has anyone else encountered this? I recently upgraded to Python 3.9.