RE: RE: [External Mail]Re: Git fork process infinitely and never stop

[程洋 <chengyang@xiaomi.com>]

Any feedback on this?

-----Original Message-----
From: 程洋
Sent: Friday, July 8, 2022 1:54 AM
To: 'lilinchao@oschina.cn' <lilinchao@oschina.cn>; 'Bagas Sanjaya' <bagasdotme@gmail.com>; 'git' <git@vger.kernel.org>
Cc: 何浩 <hehao@xiaomi.com>; Xin7 Ma 马鑫 <maxin7@xiaomi.com>; 凡军辉 <fanjunhui@xiaomi.com>; 石奉兵 <shifengbing@xiaomi.com>
Subject: RE: RE: [External Mail]Re: Git fork process infinitely and never stop

To be a supplement.
If I delete .git/objects/info/commit-graph,  everything works well As well as fetch with `-c core.commitGraph=false`

-----Original Message-----
From: 程洋
Sent: Thursday, July 7, 2022 10:20 PM
To: 'lilinchao@oschina.cn' <lilinchao@oschina.cn>; 'Bagas Sanjaya' <bagasdotme@gmail.com>; 'git' <git@vger.kernel.org>
Cc: 何浩 <hehao@xiaomi.com>; Xin7 Ma 马鑫 <maxin7@xiaomi.com>; 凡军辉 <fanjunhui@xiaomi.com>; 石奉兵 <shifengbing@xiaomi.com>
Subject: RE: RE: [External Mail]Re: Git fork process infinitely and never stop

I found another thing.

1. if I execute `git fetch --filter=blob:none --quiet --progress miui --prune --tags +refs/heads/*:refs/remotes/miui/* +refs/heads/miui13-s-thor-vendor-stable:refs/remotes/miui/miui13-s-thor-vendor-stable`  on version 2.25.1. It just throw error rather than infinite loop, like this youtube video "https://www.youtube.com/watch?v=qvYTvVRE0FU&feature=youtu.be"

2. I found if I delete .git/objects, everything goes fine. And there are only 20 files inside it. So I delete them one by one to see which cause the problem. It's `.git/objects/info/commit-graph`. So I upload the file as attachment


Tree before I do second experiment
.
├── 20
│   └── 740928c988ed93daf943869621290d68f62b47
├── 25
│   └── cbb5f02bbcde2effebba84bbc866a29e68afdf
├── 36
│   └── 3aa2d25b71c5aff9d0d8ad8207bc27b4492e8b
├── 5b
│   └── 7b5cb8dd63be48e1466c9d957420a9765a805e
├── 65
│   └── e272c21f28fa8e28dd904f3576f5f23cdb8214
├── 8b
│   └── 148aa56b7c559e217bd31a16e886b16e21cde1
├── 97
│   └── faebca644ae8bfebcbdc8a1dd8e179e9b657de
├── a3
│   └── 852cda2af632dcc7dfbe466d6d8608c2e06520
├── a4
│   └── aa8ae78300217b0da0ab7c4b8ea22b5b74b958
├── a9
│   ├── 04e09d1ee0e0b89acd5196326399d89de70742
│   └── 7d1ffa5c4dad081469b356d0571d0b6166d00e
├── b3
│   └── 2b750166e2d54b8bd3ac62d7aeaf732e14f20d
├── b8
│   └── 957799c3a460ba2e0d26ce0081a4d092dcfb17
├── c5
│   └── be026b3b87a1ae4321700ee45ffcb5eee3ca48
├── d1
│   └── e65d268d5a2230d1d869d55497e0c1eb59b9a5
├── dd
│   └── 483c3c475117275bbf7768a940962842bd5aeb
├── e2
│   └── 6899458dc6cf2c3749c0732ac5b04ccd4c7765
├── e3
│   └── 06b12e22c7914ff80374b7857ee67864a61ba5
├── e7
│   └── a0cc17f9939b80b135c0ec389cbcc98aea70c7
├── eb
│   └── 9169a0d2124594e92720fc6ac1ce3fb29c7d87
├── ed
│   └── 6a815060f960032ecaf70fefdbdae4ac466314
├── f8
│   └── 4401972a0a7020aef85b83561d70af41962a6f
├── info
│   ├── commit-graph
│   └── packs
└── pack
    ├── pack-029d08823bd8a8eab510ad6ac75c823cfd3ed31e.idx
    ├── pack-029d08823bd8a8eab510ad6ac75c823cfd3ed31e.pack
    ├── pack-029d08823bd8a8eab510ad6ac75c823cfd3ed31e.promisor
    ├── pack-c931093ae6c9df5d36b773f94efc38d9d4b39108.idx
    ├── pack-c931093ae6c9df5d36b773f94efc38d9d4b39108.pack
    ├── pack-c931093ae6c9df5d36b773f94efc38d9d4b39108.promisor
    ├── tmp_idx_RRo8oo
    └── tmp_pack_1hgueq



-----------------------------------------------------------------------------------Original Message---------------------------------------------------------------------------------------------------------------------------------------
From: 程洋
Sent: Wednesday, July 6, 2022 10:03 PM
To: lilinchao@oschina.cn; Bagas Sanjaya <bagasdotme@gmail.com>; git <git@vger.kernel.org>
Cc: 何浩 <hehao@xiaomi.com>; Xin7 Ma 马鑫 <maxin7@xiaomi.com>
Subject: 回复: RE: [External Mail]Re: Git fork process infinitely and never stop

To lilinchao:
>So the repo "git/gerrit" is hosted in your local? and how you "copy" it to your own PC?
1. git/gerrit is hosted on remote server
               2. I just scp the whole repository of the user who reproduce the problem to our own PC. And then we can reproduce it on our own PC.

To Johannes:
> Hooks may also play a role.
We do have some hooks. But I don't think they're related. Because even I delete those hooks, the problem stands still

To Ævar Arnfjörð:
>I assume you can't share the repo, but perhaps try if you can reproduce it with a "git fast-export --anonymize" version of it, and if so whether you'd be willing to share that. It will publish the "shape of the history" of the repo, but not any meaningful data (all commits, trees, blobs etc. are replaced).
`git fast-export --anonymize` just output is empty. If I try `git fast-export --anonymize --all`, it seems to fetch first, which goes into the infinite loop again

>The YouTube video shows that you're using various options to git-fetch,
>including filters, refspecs etc. Does a plain "git fetch" reproduce
>this, and if not what's the option (try adding them one at a time &
>experiment) that needs to be added to trigger this?

`git fetch` also has this problem.

I somewhat suspect some --filter funny business, but that's just a hunch...
It seems to happen after I told my team to use "partial-clone" AND "git v2.36.1".  I'm not sure which one is the cause or both of them cause this.
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