Fix: API Returns 500 Internal Server Error
Find the stack trace via the request ID
500 errors are unhandled exceptions. The correct first step is to correlate a failing request ID with a stack trace in logs — not to add retries.
Frequently Asked Questions
What causes API Returns 500 Internal Server Error?
500 errors are unhandled exceptions. The correct first step is to correlate a failing request ID with a stack trace in logs — not to add retries.
How to fix API Returns 500 Internal Server Error?
Grep logs for the failing request ID and read the stack trace. Common causes: null from a DB join, a timeout from a downstream service, or a deserialization error.
Example fix from Kintify Fix
Input: /api/users returns 500 for some users only
Output: Grep logs for the failing request ID and read the stack trace. Common causes: null from a DB join, a timeout from a downstream service, or a deserialization error.
Used by developers debugging real production systems