AWS Step Functions - Invoke Another - All Built from Console

Question

I am testing out a flow where I use one Step Function to invoke another. The child State Machine will be used to invoke a lambda for data processing.

To bear this out, I am creating very simple objects via the web console, however, when attempting to run the parent process, I am getting the following error

User: arn:aws:sts::xxxxxxx:assumed-role/StepFunctions-ETL_POC-role-xxxx/step-functions-express-xxxx is not authorized to access this resource (Service: AWSStepFunctions; Status Code: 400; Error Code: AccessDeniedException;

I have played around by adding the Step Functions Full Access managed policy to the IAM role, but that didn't seem to do the trick.

What am I missing?

Can you update your question to include a sanitized version of your workflow definitions (ASL) as well as the policies for the execution role on your parent state machine? — Justin Callison
– Justin Callison, Commented Apr 17, 2023 at 1:03
Oh my gosh. Thank you for asking me to walk through that process! I could have sworn that I specified my child SFN's ARN, but it was the boiler plate setup; the ARN was generic and not pointing at my actual Child SFN. Yikes. Thanks again. — Btibert3
– Btibert3, Commented Apr 17, 2023 at 22:49

Btibert3 · Accepted Answer · 2023-04-29 23:14:08Z

2

The issue was that the definition of the State Machine was using the default placeholder text. I was attempting to do everything via the web console and never once thought to check if I had properly referenced the ARN.

This was only found after the first comment from Justin above.

answered Apr 29, 2023 at 23:14

Btibert3

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