Troubleshooting Error Responses from Your Origin

If CloudFront requests an object from your origin, and the origin returns an HTTP 4xx or 5xx status code, there's a problem with communication between CloudFront and your origin. The following topics describe common causes for some of these HTTP status codes, and some possible solutions.

Topics

• HTTP 400 Status Code (Bad Request)
• HTTP 500 Status Code (Lambda Execution Error)
• HTTP 502 Status Code (Bad Gateway)
• HTTP 502 Status Code (Lambda Validation Error)
• HTTP 503 Status Code (Lambda Limit Exceeded)
• HTTP 503 Status Code (Service Unavailable)
• HTTP 504 Status Code (Gateway Timeout)