Mailing List Archive: Grace mode with 404 responses?

Hello, folks. Iâ€™m testing a Varnish 4.1.1 setup. Specifically Iâ€™m working with shielding a client service from an unreliable remote service by proxying and caching responses from the remote system.

Grace mode is working fine for situations where the remote server is unresponsive (e.g. apache turned off), but does not seem to work when a 404 is returned for a resource. I immediately get the 404 on the client when the TTL (not the TTL + grace) is expired.

Iâ€™m assuming this is something Iâ€™m not doing right in my VCL file, but I canâ€™t figure out what.

Is there a canonical example of how to handle this properly?

Thanks.

-Pete
_______________________________________________
varnish-misc mailing list
varnish-misc@varnish-cache.org
https://www.varnish-cache.org/lists/mailman/listinfo/varnish-misc

Hi Peter,

what is not working in the case of 404?

--
Guillaume Quintard

On Fri, Dec 2, 2016 at 9:11 AM, Peter Loron <peterloron@gmail.com> wrote:

> Hello, folks. Iâ€™m testing a Varnish 4.1.1 setup. Specifically Iâ€™m working
> with shielding a client service from an unreliable remote service by
> proxying and caching responses from the remote system.
>
> Grace mode is working fine for situations where the remote server is
> unresponsive (e.g. apache turned off), but does not seem to work when a 404
> is returned for a resource. I immediately get the 404 on the client when
> the TTL (not the TTL + grace) is expired.
>
> Iâ€™m assuming this is something Iâ€™m not doing right in my VCL file, but I
> canâ€™t figure out what.
>
> Is there a canonical example of how to handle this properly?
>
> Thanks.
>
> -Pete
> _______________________________________________
> varnish-misc mailing list
> varnish-misc@varnish-cache.org
> https://www.varnish-cache.org/lists/mailman/listinfo/varnish-misc