vcl_error and first_byte_timeout?

Jennings, Raymond raymond.jennings at
Wed Apr 2 18:06:29 CEST 2014

That would be awesome to have if it does not exist.  I would even settle
for something making it's way to the varnishncsa log file via something
like a %{Varnish... parameter.

On Wed, Apr 2, 2014 at 11:53 AM, Jeff Potter
<jpotter-varnish at>wrote:

> Hi List,
> Is there a way to figure out from inside vcl_error if the error was raised
> because of a backend timeout?
> I'm trying to return a synthetically generated doc to clients that lets us
> see that the error was due to a backend taking too long to reply, so that
> the client can react different in this case (as opposed to other errors).
> Thanks!
> -Jeff
> _______________________________________________
> varnish-misc mailing list
> varnish-misc at
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