Re: realtime switch to another backend if got 5xx error?

2009/5/21 Dawid Sieradzki / Gadu-Gadu S.A. <dawid.sieradzki#gadu-gadu.pl>:
>
> A. haproxy recived request from http_client
> B. haproxy sent request from http_client to backend1
> C. backend1 said 500 internal server error
>
> I want: :-)
> D. haproxy sent request from_http to backend2 (or backup backend or another
> one, or one more time to backend1)

As far as the haproxy documentation says, a request will not be issued more than once to a backend server. This is to avoid re-submitting a potentially critical transaction. Haproxy retries only if the TCP connection could not be opened at all (Connection refused).

Cheers,

-- 
Jean-Baptiste Quenot
http://jbq.caraldi.com/