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error: packfile while git fsck

DISCUSSION Nicolas Ferre 2 participants 5 messages Jun 15, 2016

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#0 lore raw

Hi all,
(please cc me on response)

I am facing error during git status & git fsck on my tree. This tree is cloned from various linux kernel trees.

Here are a sample of the error I see :

$ git fsck
error: packfile .git/objects/pack/pack-2ab31ad1f8cb69d091a56fe936634e4796606d49.pack does not match index
error: packfile .git/objects/pack/pack-2ab31ad1f8cb69d091a56fe936634e4796606d49.pack cannot be accessed
error: packfile .git/objects/pack/pack-2ab31ad1f8cb69d091a56fe936634e4796606d49.pack does not match index
error: packfile .git/objects/pack/pack-2ab31ad1f8cb69d091a56fe936634e4796606d49.pack cannot be accessed
error: packfile .git/objects/pack/pack-2ab31ad1f8cb69d091a56fe936634e4796606d49.pack does not match index
[..]
error: packfile .git/objects/pack/pack-2ab31ad1f8cb69d091a56fe936634e4796606d49.pack cannot be accessed
dangling blob fe130d58453393f15e0db82bca18f35998689a87
dangling commit 2515ddc6db8eb49a79f0fe5e67ff09ac7c81eab4
error: packfile .git/objects/pack/pack-2ab31ad1f8cb69d091a56fe936634e4796606d49.pack does not match index
error: packfile .git/objects/pack/pack-2ab31ad1f8cb69d091a56fe936634e4796606d49.pack cannot be accessed
error: packfile .git/objects/pack/pack-2ab31ad1f8cb69d091a56fe936634e4796606d49.pack does not match index
error: packfile .git/objects/pack/pack-2ab31ad1f8cb69d091a56fe936634e4796606d49.pack cannot be accessed
error: packfile .git/objects/pack/pack-2ab31ad1f8cb69d091a56fe936634e4796606d49.pack does not match index
error: packfile .git/objects/pack/pack-2ab31ad1f8cb69d091a56fe936634e4796606d49.pack cannot be accessed
dangling commit 6bb7a935489dab20802dde6c2cb7d8582f4849bf
error: packfile .git/objects/pack/pack-2ab31ad1f8cb69d091a56fe936634e4796606d49.pack does not match index
error: packfile .git/objects/pack/pack-2ab31ad1f8cb69d091a56fe936634e4796606d49.pack cannot be accessed
dangling commit 4aba41ea8bdc1b475861f5e5c1649ab20251090c
error: packfile .git/objects/pack/pack-2ab31ad1f8cb69d091a56fe936634e4796606d49.pack does not match index
error: packfile .git/objects/pack/pack-2ab31ad1f8cb69d091a56fe936634e4796606d49.pack cannot be accessed
[..]
$  git verify-pack .git/objects/pack/pack-2ab31ad1f8cb69d091a56fe936634e4796606d49.pack
pack-2ab31ad1f8cb69d091a56fe936634e4796606d49.pack
nferre@bendor:linux-2.6-arm > git verify-pack .git/objects/pack/pack-2ab31ad1f8cb69d091a56fe936634e4796606d49.pack
error: packfile .git/objects/pack/pack-2ab31ad1f8cb69d091a56fe936634e4796606d49.pack does not match index
fatal: packfile .git/objects/pack/pack-2ab31ad1f8cb69d091a56fe936634e4796606d49.pack cannot be accessed

What can I do to recover my git archive ?

Did I do something wrong (merging files while fetching) ?

Is it related to a known issue (I cannot figure out if it is after some googling) ?

Thanks for your help. Regards,

Signature · 1 line
Nicolas Ferre
#1 lore raw
Quoted 8 lines · Nicolas Ferre

Hi all,
(please cc me on response)

I am facing error during git status & git fsck on my tree. This tree is cloned from various linux kernel trees.

Here are a sample of the error I see :

Quoted 7 lines
$ git fsck
error: packfile
.git/objects/pack/pack-2ab31ad1f8cb69d091a56fe936634e4796606d49.pack does not
match index
error: packfile
.git/objects/pack/pack-2ab31ad1f8cb69d091a56fe936634e4796606d49.pack cannot be
accessed

[...]

What git version?

Quoted 1 line

Did I do something wrong (merging files while fetching) ?

Unlikely.

Nicolas

#2 lore raw

Nicolas Pitre :

Quoted 17 lines · Nicolas Ferre
Quoted 9 lines

Hi all,
(please cc me on response)

I am facing error during git status & git fsck on my tree. This tree is cloned from various linux kernel trees.

Here are a sample of the error I see :

Quoted 7 lines
$ git fsck
error: packfile
.git/objects/pack/pack-2ab31ad1f8cb69d091a56fe936634e4796606d49.pack does not
match index
error: packfile
.git/objects/pack/pack-2ab31ad1f8cb69d091a56fe936634e4796606d49.pack cannot be
accessed
Quoted 3 lines

[...]

What git version?

$ git --version
git version 1.5.3.7

Kind regards,

Signature · 1 line
Nicolas Ferre
#3 lore raw
Quoted 20 lines · Nicolas Ferre

Nicolas Pitre :

Quoted 19 lines · Nicolas Ferre
Quoted 18 lines

Hi all,
(please cc me on response)

I am facing error during git status & git fsck on my tree. This tree is cloned from various linux kernel trees.

Here are a sample of the error I see :

$ git fsck
error: packfile
.git/objects/pack/pack-2ab31ad1f8cb69d091a56fe936634e4796606d49.pack does
not
match index
error: packfile
.git/objects/pack/pack-2ab31ad1f8cb69d091a56fe936634e4796606d49.pack
cannot be
accessed
Quoted 6 lines
Quoted 3 lines

[...]

What git version?

$ git --version
git version 1.5.3.7

OK. Since this is not bleeding edge, it is pretty unlikely that the corruption is due to git itself. Furthermore, the git packs are always read only once they've been created, meaning that if they weren't corrupted at some point then something outside of git caused the corruption. You really should consider the possible causes for that (dying disk, pilot error, etc).

As to recovery... That really depends if you have personal work committed to your repository. If not then the easiest solution is
simply to recreate it by refetching from upstream. If you have
personal work in there then you could try to fetch your work branch into the newly created repository. The latest git version could help with the extraction of non-corrupted objects out of a bad pack, but if the objects you are interested in are themselves corrupted then your only hope is to have a copy of those objects somewhere else.

Nicolas

#4 lore raw

Nicolas Pitre :

Quoted 24 lines · Nicolas Ferre
Quoted 23 lines

Nicolas Pitre :

Quoted 21 lines · Nicolas Ferre
Quoted 18 lines

Hi all,
(please cc me on response)

I am facing error during git status & git fsck on my tree. This tree is cloned from various linux kernel trees.

Here are a sample of the error I see :

$ git fsck
error: packfile
.git/objects/pack/pack-2ab31ad1f8cb69d091a56fe936634e4796606d49.pack does
not
match index
error: packfile
.git/objects/pack/pack-2ab31ad1f8cb69d091a56fe936634e4796606d49.pack
cannot be
accessed

[...]

Quoted 7 lines
Quoted 3 lines
Quoted 1 line

What git version?

$ git --version
git version 1.5.3.7

OK. Since this is not bleeding edge, it is pretty unlikely that the corruption is due to git itself. Furthermore, the git packs are always read only once they've been created, meaning that if they weren't corrupted at some point then something outside of git caused the corruption. You really should consider the possible causes for that (dying disk, pilot error, etc).

As to recovery... That really depends if you have personal work committed to your repository. If not then the easiest solution is simply to recreate it by refetching from upstream. If you have personal work in there then you could try to fetch your work branch into the newly created repository. The latest git version could help with the extraction of non-corrupted objects out of a bad pack, but if the objects you are interested in are themselves corrupted then your only hope is to have a copy of those objects somewhere else.

Nicolas,

Thanks for your help. I will consider migrating to a brand new git tree with my work imported in (it seems that my local work is not affected).

Just to know, as the object I try to access is not present, is there a way to rebuild the index to match this mater of fact ?

Regards,

Signature · 1 line
Nicolas Ferre