Re: [squid-users] Vary object loop

From: Amos Jeffries <>
Date: Tue, 15 Oct 2013 15:02:36 +1300

On 15/10/2013 1:08 a.m., Grooz, Marc (regio iT) wrote:
> Hi,
> what does that message mean in squid 3.3.9?
> varyEvaluateMatch: Oops. Not a Vary object on second attempt, 'http://...' 'accept-encoding="identity,gzip,deflate"'
> clientProcessHit: Vary object loop!
> Kind regrads
> Marc

Same thing it mens in any Squid version.

* The object at the given URL uses Vary header feature of HTTP.
  - Squid indexes the cache store by URL, so do deal with such features
we place a special "vary object marker" in the cache at the index where
URL lookup can find it. That object indicates that Vary is used by this
resource and what Vary: header key is to be used. Squid then must
perform a second cache lookup with the new key to find an object
relevant for the current client. The object found by the second lookup
is expected to be the real response.

* In your case the second lookup discovered a loop back to the same or
another vary object.
  - Squid is just warning you that the cache is corrupted by that loop
and will fetch a new object from the network.

Received on Tue Oct 15 2013 - 02:02:50 MDT

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