AWS Step Functions Not Triggering Lambda Function with 'TaskTimedOut' scenarios
Quick question that's been bugging me - I've been banging my head against this for hours. After trying multiple solutions online, I still can't figure this out... I'm working with an scenario with AWS Step Functions where my state machine is not triggering the associated Lambda function as expected. The Step Function is designed to invoke a Lambda function to process data, but I keep receiving a 'TaskTimedOut' behavior after it runs for 30 seconds. Here’s the relevant part of my Step Function 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:ProcessDataFunction", "TimeoutSeconds": 30, "End": true } } } ``` The Lambda function is supposed to retrieve and process data from an S3 bucket. Here’s the code for the Lambda function: ```python import json import boto3 s3 = boto3.client('s3') def lambda_handler(event, context): bucket = event['bucket'] key = event['key'] response = s3.get_object(Bucket=bucket, Key=key) data = response['Body'].read().decode('utf-8') # Simulate processing time time.sleep(35) # This is just for testing, should be optimized return { 'statusCode': 200, 'body': json.dumps(data) } ``` I've verified that the Lambda function itself is configured with a timeout of 10 minutes, and I’ve tried adjusting the `TimeoutSeconds` in the Step Function definition to match it. However, the Step Function still times out. I also checked the IAM roles and permissions; both the Step Function and Lambda have sufficient permissions to execute. Could the scenario be related to the way I'm simulating the processing time in the Lambda function, or is there something I'm missing in the configuration? Any insights into why this might be happening would be appreciated. For context: I'm using Python on Windows. My development environment is macOS. What's the best practice here? Am I missing something obvious? Any pointers in the right direction?