| Previous | Next |
| HTTP_STATUS_RAILGUN_ERROR | HTTP_STATUS_SITE_FROZEN |
HTTP_STATUS_SITE_OVERLOADED
The status is not registered by IANA. The SSL Labs API documentation uses 529 for a temporary service-overload condition and recommends retrying later rather than treating it as a permanent client error.
Use exponential backoff with a cap and avoid synchronized retries. The exact retry policy must follow the emitting service documentation because 529 has no universal HTTP semantics.
A service that uses 529 is signaling overload by local convention, not by an IANA-defined contract. Respect any Retry-After or vendor backoff guidance that accompanies the response. For persistent occurrences, inspect service capacity and request rate; aggressive immediate retries can increase the load that triggered the response.
Looking for a different code? Search another status or error code.