Disable caching the names in /etc/hosts in reverse proxy?

[xuhdev]

I'm using Nginx to act as a reverse proxy, where the backend is a name
defined in /etc/hosts. However, Nginx does not react to the changes made in
/etc/hosts until restarted. Is it possible to disable caching the names in
/etc/hosts in reverse proxy?

Thanks

Posted at Nginx Forum: http://forum.nginx.org/read.php?2,258188,258188#msg-258188