[edit] proxy_next_upstream
| Syntax: |
proxy_next_upstream error | timeout | invalid_header | http_500 | http_502 | http_503 | http_504 | http_404 | off ... |
| Default: |
error timeout |
| Context: |
http server location |
| Reference: |
proxy_next_upstream |
Directive determines in what cases the request will be transmitted to the next server:
- error — an error has occurred while connecting to the server, sending a request to it, or reading its response;
- timeout — occurred timeout during the connection with the server, transfer the request or while reading response from the server;
- invalid_header — server returned a empty or incorrect answer;
- http_500 — server returned answer with code 500
- http_502 — server returned answer with code 502
- http_503 — server returned answer with code 503
- http_504 — server returned answer with code 504
- http_404 — server returned answer with code 404
- off — it forbids the request transfer to the next server
Transferring the request to the next server is only possible when nothing has been transferred to the client -- that is, if an error or timeout arises in the middle of the transfer of the request, then it is not possible to retry the current request on a different server.
Module: HttpProxyModule