GATEWAY_TIMEOUT The answer took too long

HTTP status

504

Credit

Not settled yet

Meaning#

We could not answer within 30 seconds. The request may still finish, so its result, and whether a credit was used, are not known yet.

Cause#

Handling this request took longer than 30 seconds.

Fix#

For a slip lookup (POST /api/slips/lookup), first read its result with GET /api/slips/{request_id} (request_id is this answer's X-Request-Id), or retry with the same Idempotency-Key, which is never charged twice. While the first request still runs you get 409 IDEMPOTENCY_IN_FLIGHT, so wait and try again. Once it finishes you get its result (same request_id). A retry without the same key counts as a new request.

Example response#

{
  "type": "https://checkslip.com/problems/gateway-timeout",
  "title": "The answer took too long",
  "status": 504,
  "instance": "01a18600-0000-7000-8000-000000000000",
  "code": "GATEWAY_TIMEOUT"
}