Re: [squid-users] File corruption with reverse proxy

From: Andy Osborne <>
Date: Tue, 28 Aug 2012 19:22:20 +0100

On 28/08/12 17:51, Marcus Kool wrote:
> On 08/28/2012 10:21 AM, Andy Osborne wrote:
>> Hi All,
>> [snip]
>> The corruption doesn't always occur but when it does it looks
>> like a few contiguous bytes getting one or two bits flipped.
> It is extremely unlikely that a few bits get flipped by
> Squid, the netowrk layer or any other component except
> non-ECC memory.
> Does the server that runs Squid have ECC or non-ECC memory?
> Marcus

I'm pretty sure it's not a server hardware problem (It's EEC).
It's only affecting a very small proportion of users and there's
a clear split between those who see the problem most/all of
the time and those that never do. RAM errors aren't that
selective. RAM errors also tend to make a server unstable
which isn't the case.

I still think it's probably a Windows bug, but I can't explain
why when we find a client with the problem, it only shows
up when going via Squid and not if they pull the same content
directly from an origin server.

Received on Tue Aug 28 2012 - 18:22:23 MDT

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