OK. Thank you very much . I will do an experiment to find out this


2014/1/16 itpp2012 <nginx-forum@nginx.us>

> renenglish Wrote:
> -------------------------------------------------------
> > Sorry I can’t get it .
> >
> > If host A has added the counter and failed to response, the request
> > would be failed over to host B with successful response, so the
> > counter would be added twines. Wouldn’t it ?
>
> Then a condition must occur where host A fails right after processing the
> request, they usually fail before accepting a request, it also depends on
> the timeout for a request. And it also depends what nginx considers a fail,
> nginx might not fail a host when it does not return from accepting a
> request.
>
> You will have to simulate this to find out the conditions for a fail.
>
> Posted at Nginx Forum:
> http://forum.nginx.org/read.php?2,245979,246505#msg-246505
>
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