A developer is using AWS Step Functions to automate a workflow The workflow defines each step as an AWS Lambda function task The developer notices that runs of the Step Functions state machine fail in the GetResource task with either an UlegalArgumentException error or a TooManyRequestsException error
The developer wants the state machine to stop running when the state machine encounters an UlegalArgumentException error. The state machine needs to retry the GetResource task one additional time after 10 seconds if the state machine encounters a TooManyRequestsException error. If the second attempt fails, the developer wants the state machine to stop running.
How can the developer implement the Lambda retry functionality without adding unnecessary complexity to the state machine'?
Step Functions Retriers: Retriers provide a built-in way to gracefully handle transient errors within State Machines. Here's how to use them:
Directly attach a retrier to the problematic 'GetResource' task.
Configure the retrier:
ErrorEquals:Set this to ['TooManyRequestsException'] to target the specific error.
IntervalSeconds:Set to 10 for the desired retry delay.
MaxAttempts:Set to 1, as you want only one retry attempt.
Error Handling:
Upon 'TooManyRequestsException', the retrier triggers the task again after 10 seconds.
On a second failure, Step Functions moves to the next state or fails the workflow, as per your design.
'IllegalArgumentException' causes error propagation as intended.
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