👀 Views: 2 💬 Answers: 1 📅 Created: 2025-06-10

aws step-functions lambda JavaScript

Can someone help me understand I'm not sure how to approach I tried several approaches but none seem to work... I'm stuck trying to I'm working on a personal project and I'm currently using AWS Step Functions to orchestrate a workflow that involves invoking multiple Lambda functions dynamically based on the input. However, I'm working with an 'Invalid State' behavior when I attempt to use dynamic ARNs for my task resources. The state machine definition looks something like this: ```json { "Comment": "A simple AWS Step Functions state machine that invokes Lambda functions.", "StartAt": "DynamicInvoke", "States": { "DynamicInvoke": { "Type": "Task", "Resource": "arn:aws:lambda:${aws:Region}:${aws:AccountId}:function:${input.lambdaFunctionName}", "End": true } } } ``` In this case, `${input.lambdaFunctionName}` is a placeholder for a function name passed into the state machine. However, when I execute the state machine, I receive the behavior message: ``` "Invalid State: The ARN provided does not match the required format." ``` I've ensured that `input.lambdaFunctionName` is populated correctly before calling the state machine. Here is how I invoke the Step Function from my Node.js application: ```javascript const AWS = require('aws-sdk'); const stepfunctions = new AWS.StepFunctions(); const params = { stateMachineArn: 'arn:aws:states:us-east-1:123456789012:stateMachine:MyStateMachine', input: JSON.stringify({ lambdaFunctionName: 'MyLambdaFunction' }) }; stepfunctions.startExecution(params, function(err, data) { if (err) console.log('behavior:', err); else console.log('Success:', data); }); ``` I have double-checked that AWS Lambda functions with the name `MyLambdaFunction` exist in the same region. I've also tried hardcoding the ARN directly in the state machine definition, and it works fine, which leads me to think that the scenario is specifically related to how I'm trying to use the dynamic ARN. Is there a specific syntax or best practice I should be using when dynamically constructing ARNs in AWS Step Functions? Any insights would be greatly appreciated. How would you solve this? The stack includes Javascript and several other technologies. I'd really appreciate any guidance on this. This issue appeared after updating to Javascript 3.11. Am I missing something obvious? I'm working with Javascript in a Docker container on Ubuntu 22.04. Any examples would be super helpful. I'm using Javascript LTS in this project. Could this be a known issue?