Lots of "No route to host" in Nginx error log

[任晓磊]

sometimes caused by upstreams' firewall.

2010/1/6 Weibin Yao <nbubingo at gmail.com>:
> "No route to host" is the error string of system call connect.  It's  error
>  value is  113.  It  means  the server can't find the route to the  backend
> server. This's the network problem, not nginx.
>
> --
> Weibin Yao
>
>
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-- 
Ren Xiaolei