Re: fetch and bundle don't work in (semi-)broken repo

From: Jonathan Nieder <jrnieder@gmail.com>
Date: Oct 19, 2010, 18:39 UTC
Message-ID: <20101019183925.GF25139@burratino>
In-Reply-To: <20101019160957.GK11713@pengutronix.de>

Hi,

Uwe Kleine-König wrote:

Show 7 quoted lines

> 	ukl@hostname:~/path1/linux-2.6$ git fetch ~/path2/linux-2.6 sectionmismatches
> 	remote: Counting objects: 118, done.
> 	remote: error: unable to find 40aaeb204dc04d3cf15c060133f65538b43b13b0
> 	remote: Compressing objects: 100% (83/83), done.
> 	remote: fatal: unable to read 40aaeb204dc04d3cf15c060133f65538b43b13b0
> 	error: git upload-pack: git-pack-objects died with error.
> 	fatal: git upload-pack: aborting due to possible repository corruption on the remote side.

Sounds like alternates or workdir allowed gc to be overzealous, indeed.

Could you:

 1. Make a copy of the corrupted repo, just in case.
 2. Explode all backs with "git unpack-objects"
 3. Identify the missing object, as explained in
    Documentation/howto/recover-corrupted-blob-object.txt?

With that information, it would be easier to examine whether and how pack-objects could be smarter about fetching the non-missing objects.

Show 5 quoted lines

> I don't know what 40aaeb204dc04d3cf15c060133f65538b43b13b0 is, but I
> think it's not necessary for the sectionmismatches branch:
> 
> 	ukl@hostname:~/path2/linux-2.6$ git format-patch linus/master..sectionmismatches
> 	0001-wip-enable-DEBUG_SECTION_MISMATCH.patch

[...]

> and linus/master is contained in ~/path1/linux-2.6, too.

Cc-ing Nico, pack-objects wizard.

Thanks for reporting. Jonathan