Windows 10 random hg verify errors?

[Steve (Gadget) Barnes]

On 18/02/2016 22:48, Matt Mackall wrote:
> On Wed, 2016-02-17 at 15:09 -0600, Eric Pyle wrote:
>> Good news (sort of). I decided to use *msconfig* advanced options to limit
>> my computer to *1 CPU*, and it seems to have made a world of (good)
>> difference. I haven't encountered the random errors again, and I'm able to
>> download big files and do big hg clones which were also an issue. I
>> couldn't even download tortoisehg-3.5.2-x64.msi without getting Network
>> error across different browsers.
>>
>> Basically, when I tried cloning, mozilla-central, per Gregory Szorc's
>> suggestion, I encountered the same network errors that eventually led to me
>> investigating random integrity errors with hg verify issue.
>>
>> One clone failed with integrity check failure:
>>
>> % hg clone --verbose https://hg.mozilla.org/mozilla-central/
>>> "C:\Users\pylee\Documents\ubsicap\repos\mozilla-central"
>>> applying clone bundle from
>>> https://hg.cdn.mozilla.net/mozilla-central/6ea654cad929c9bedd8a4161a182b6189
>>> fbeae6a.gzip.hg
>>> adding changesets
>>> transaction abort!
>>> rollback completed
>>> abort: *integrity check failed* on 00changelog.i:b8802b591ce2!
>>> [command returned code 255 Wed Feb 17 13:24:19 2016]
> 
> Symptomatic of hardware failure. You're probably not seeing this sort of thing
> with other software because other software doesn't end-to-end cryptographically
> checksum all the data in works on, so one bit errors don't cause it to explode.
> 
>> Most of the time I would get this DECRYPTION_FAILED_OR_BAD_RECORD_MAC error:
>>
>> % hg clone --verbose https://hg.mozilla.org/mozilla-central/
>>> "C:\Users\pylee\Documents\ubsicap\repos\mozilla-central"
>>> applying clone bundle from
>>> https://hg.cdn.mozilla.net/mozilla-central/6ea654cad929c9bedd8a4161a182b6189
>>> fbeae6a.gzip.hg
>>> adding changesets
>>> adding manifests
>>> transaction abort!
>>> rollback completed
>>> abort: error: DECRYPTION_FAILED_OR_BAD_RECORD_MAC
>>> [command returned code 255 Wed Feb 17 13:34:02 2016]
> 
> Same.
> 
> Looking at the specs for your machine, I note two things:
> 
> - non-ECC RAM
> - 4-core chip
> 
> I'd usually blame this on bad RAM as modern CPUs tend to have ECC on their
> internal caches. But it's totally possible you have a core-specific failure or a
> northbridge problem of some sort. 
> 
> -- 
> Mathematics is the supreme nostalgia of our time.
> 
I would also suggest taking a copy of the repository from your hard
drive onto a removable drive and running a verify on another machine on
that copy so as to rule out possible hard disk errors.

-- 
Steve (Gadget) Barnes
Any opinions in this message are my personal opinions and do not reflect
those of my employer.