Hello everybody!
I have some _very interesting_ news regarding this issue!
Here is the deal:
1. I was able to *reproduce the error on a machine of a coworker!*
2. I was able to rule out
- HDD: It's reproducible from /dev/shm
- Memory: Memory tests works fine
now the interesting part:
3. Occurs on Linux kernels 3.7.10, 3.8.x, 3.9.11, 3.10.5
_but not on:_ 3.6.11, 3.5.7 and 2.6.32
Both machines showing this problem are »Dell Latitude E6330« with an
»i5-3340M @ 2.70GHz« CPU. Mine running stock kernels, coworker using
plain Ubuntu 13.04.
Furthermore I need to stress, that we never had any issues with our
devices during daily _at all_.
So what to do best now?
- Ben
Am 08.08.2013 19:38, schrieb Junio C Hamano:
>>>> Can you try to reproduce with a version older than v1.8.3?
>>>> E.g. v1.8.2.3.
>>>
>>> It seems to run 'much better'
>>> v1.8.2.3 : 3/10 runs do fail
>>> fb56570 : 9/10 runs do fail
[..]
>>> They always fail on a big blob (39MB) as I wrote in my first e-mail:
>>>
>>> ben@n179 /tmp/project.git $ ~/projects/git.git/git-show
>>> 49cdd0b21a351f3366008615d2cf8d03ca943978 | wc -c
>>> error: sha1 mismatch 49cdd0b21a351f3366008615d2cf8d03ca943978
>>> fatal: bad object 49cdd0b21a351f3366008615d2cf8d03ca943978
>>> 0
>>> ben@n179 /tmp/project.git $ ~/projects/git.git/git-show
>>> 49cdd0b21a351f3366008615d2cf8d03ca943978 | wc -c
>>> 39517156
>
> Hmm, from this, and a later one ...
>
> ... I am reading that (1) the packfile and repository is basically
> OK, (2) reading that object sometimes fails, and (3) the symptom is
> not limited to fsck but anything that reads the object with
> parse_object(). And that symptom exists only on that single machine
> (I am assuming that the repository was bit-for-bit copied, not
> "cloned", for the purpose of testing it on the other machine). That
> makes me suspect something outside the control of Git (e.g. faulty
> memory or disk controller cable).
>
> Are there other big blobs in the repository, and would "show | wc" fail
> if you attempt to read it on that machine?
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