Re: bug: "fatal: cannot pread pack file", version 1.7.5.4

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On Mon, Jul 02, 2012 at 12:03:13PM -0700, Lars Winterfeld wrote:

> I have used git for some time and regularly pushed changes to another
> server (as some kind of backup), but today I got this error during
> `git push`:
> 
> Counting objects: 1293, done.
> Compressing objects: 100% (1027/1027), done.
> Writing objects: 100% (1229/1229), 70.83 MiB | 364 KiB/s, done.
> Total 1229 (delta 343), reused 0 (delta 0)
> fatal: cannot pread pack file: No such file or directory
> error: unpack failed: index-pack abnormal exit
> To user@host:~/path/
> ! [remote rejected] master -> master (n/a (unpacker error))
> error: failed to push some refs to 'user@host:~/path/'
> 
> I found similar bug reports suggesting to upgrade too version 1.7.x,
> but I am already using git version 1.7.5.4. Can somebody explain to
> me what this error is about? What can I do to resolve it / is there a
> workaround?

It's very odd for pread to report ENOENT (since it is always operating
on an already-opened file descriptor). Older versions of git would
sometimes sometimes report errno even when we get a return of 0 (when
errno is bogus, and they should say "truncated file" or similar), but
that was long ago fixed in fb74243 (Do not use errno when pread()
returns 0, 2008-10-06). There was also an actual bug fixed by a91d49c
(index-pack: Loop over pread until data loading is complete.,
2007-02-27) that I think could also generate this error.

What OS is the server running? Is it using NFS? Are you sure that the
server version is also v1.7.5.4?

-Peff
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