421
HTTP 421 Misdirected Request
4xx Client Error
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Tailwind
4xx Client Error
RFC 7540, Section 9.1.2
What is HTTP 421 Misdirected Request?
The 421 (Misdirected Request) status code indicates that the request was directed at a server that is not able to produce a response. This can occur when a connection is reused for a different origin in HTTP/2 or when a server receives a request for a virtual host it does not serve.
Common Use Cases
- HTTP/2 connection reuse for different origins
- Load balancer routing errors
- Misconfigured virtual hosts