Unexplained Cache MISSes

[Nigel Peck]

Thanks Carlos, I did see that issue on GitHub and very helpful to have 
the short version :) It seems that in some cases hits are being 
attempted on objects that are in the process of being purged, or 
something like that, which is causing this error.

Thanks,
Nigel

On 25/05/2017 14:25, Carlos Abalde wrote:
> Hi,
> 
> Just in case this is useful, the 'vcl_hit{} returns miss without busy 
> object' error is documented in 
> https://github.com/varnishcache/varnish-cache/issues/1799. It happens 
> when obj.ttl + obj.grace > 0 and leaving 'vcl_hit' with 'return (miss)'. 
> While the object is being re-fetched those errors will be logged because 
> request coalescing won't work as expected for later requests of the same 
> object. That means later requests will enter 'vcl_hit' and then will be 
> handled as pass requests. Once the objet is re-fetched, further requests 
> will behave as expected.
> 
> Best,
> 
> --
> Carlos Abalde
>