HTTP 202 Accepted vs 499 Client Closed Request
HTTP 202 (Accepted) is a 2xx Success response, while 499 (Client Closed Request) is a 4xx Client Error response. 202 indicates that the request has been accepted for processing, but the processing has not been completed. The request might or might not eventually be acted upon. In contrast, 499 means that a non-standard status code used by Nginx when the client closes the connection before the server responds.
Описание
The request has been accepted for processing, but the processing has not been completed. The request might or might not eventually be acted upon.
Когда вы это видите
For async operations like batch jobs, email sending, or background tasks that take time to complete.
Как исправить
Poll the provided status URL or wait for a callback/webhook.
Описание
A non-standard status code used by Nginx when the client closes the connection before the server responds.
Когда вы это видите
In Nginx logs when clients timeout or navigate away before receiving the response.
Как исправить
Optimize server response times. Check for slow upstream services.
Ключевые различия
202 is a 2xx Success response, while 499 is a 4xx Client Error response.
HTTP 202: The request has been accepted for processing, but the processing has not been completed. The request might or might not eventually be acted upon.
HTTP 499: A non-standard status code used by Nginx when the client closes the connection before the server responds.
You encounter 202 when for async operations like batch jobs, email sending, or background tasks that take time to complete.
You encounter 499 when in Nginx logs when clients timeout or navigate away before receiving the response.
Когда что использовать
For 202 (Accepted): Poll the provided status URL or wait for a callback/webhook. For 499 (Client Closed Request): Optimize server response times. Check for slow upstream services.