trafficserver-users mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Alan Carroll <>
Subject Re: ATS 6.2.1 + cache read
Date Fri, 22 Sep 2017 23:15:32 GMT
I think this is a known issue for a long time. What's happening is the
requests are trying to get the write lock on the object and failing, which
results in giving up and going direct to origin. There might be a collapsed
forwarding plugin which sort of mitigates this. There is on going work on
fixing it but that's not ready for production yet.

On Fri, Sep 22, 2017 at 5:45 PM, Jeremy Payne <> wrote:

> Question.. Is there a known issue with ATS 6.2.1(or any version),
> where if ATS can't read from
> cache fast enough for a given object, ATS simply sends an IMS to the
> origin, instead of waiting for a response from the cache lookup ?
> I am noticing that if multiple requests fall in the same second for a
> given object, that ATS gives up
> trying to read from cache, and simply sends an IMS to the origin.
> Known issue? Or possible PEBCAK error again ?

View raw message