On Wed, Dec 22, 2010 at 12:42:24PM +0530, Anand Shah wrote: > I am running varnish on 64 bit Centos. Getting too many 503 errors > recently and i tried debugging it with some help from Forums on > mailinglist.
> VARNISHLOGS: > > 180 VCL_call c miss fetch > 180 FetchError c no backend connection > 180 VCL_call c error deliver In my experience, "no backend connection" indicates that whatever backend was selected to handle this request was unavailable due to the health check/probe returning an error. What was the backend health at the time? You can use the 'debug.health' command in the CLI to view health information, or varnishlog -i Backend_health to see the results of the health checks as they occur. If a backend is marked as 'sick' then Varnish won't send any requests to it, since it's unlikely to help the situation. _______________________________________________ varnish-misc mailing list [email protected] http://www.varnish-cache.org/lists/mailman/listinfo/varnish-misc
