Unexplained Cache MISSes

Nigel Peck np.lists at sharphosting.uk
Thu May 25 21:32:03 CEST 2017

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.


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

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