AWS - Serverless Architecture
A Step Functions state machine uses a Choice state but always goes to the Default state even when inputs match Choice conditions. What is the likely error?
A Step Functions state machine uses a Choice state but always goes to the Default state even when inputs match Choice conditions. What is the likely error?
medium📝 Debug Q7 of 15
Step-by-Step Solution
Solution:
Step 1: Understand Choice state evaluation
Choice conditions rely on correct JSONPath to evaluate input values properly.Step 2: Identify why Default is always chosen
If JSONPath is wrong, conditions never match, so Default state runs every time.Final Answer:
Choice conditions use incorrect JSONPath expressions -> Option BQuick Check:
Wrong JSONPath = Default state chosen [OK]
Quick Trick: Validate JSONPath in Choice conditions carefully [OK]
Common Mistakes:
- Assuming missing End causes default choice
- Confusing StartAt with Choice state
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