Upstream Keepalive connection close

[Gona]

Hi Maxim,

If possible I would like to use a keep-alive connection timeout less than
that of the backend servers to avoid premature connection close by backend
server. As mentioned before,  I am trying to avoid other options like
rerouting using proxy_next_upstream or retrying by downstream client.

Is there a way to set a timeout on keep-alive connections to backend
servers? Or even force close or invalidate the connection cache from code? 

Thanks,
Gona

Posted at Nginx Forum: http://forum.nginx.org/read.php?2,255966,256878#msg-256878