[Gluster-users] Corrupted object's [GFID], despite md5sum matches everywhere

[cYuSeDfZfb cYuSeDfZfb]

Hi,

To test corruption detection and repair, we modified a file inside the
brick directory on server glusterfs1, and scheduled regular scrubs. The
corruption is detected:

Error count: 1

Corrupted object's [GFID]:

9be5eecf-5ad8-4256-8b08-879aecf65881 ==> BRICK: /data/brick1/gv0
 path: /prd/drupal-files-prd/inline-images/small - main building 1_0.jpg

We have self-healing enabled, and used these steps to correct the corrupted
object:

user at glusterfs1:~$ sudo find /data/brick1/gv0/.glusterfs -name
> 9be5eecf-5ad8-4256-8b08-879aecf65881
> /data/brick1/gv0/.glusterfs/9b/e5/9be5eecf-5ad8-4256-8b08-879aecf65881
> /data/brick1/gv0/.glusterfs/quarantine/9be5eecf-5ad8-4256-8b08-879aecf65881
>
> user at glusterfs1:~$ sudo find /data/brick1 -samefile
> /data/brick1/gv0/.glusterfs/9b/e5/9be5eecf-5ad8-4256-8b08-879aecf65881
> /data/brick1/gv0/.glusterfs/9b/e5/9be5eecf-5ad8-4256-8b08-879aecf65881
> /data/brick1/gv0/prd/drupal-files-prd/inline-images/small - main building
> 1_0.jpg
>
> user at glusterfs1:~$ sudo rm
> /data/brick1/gv0/.glusterfs/9b/e5/9be5eecf-5ad8-4256-8b08-879aecf65881
> user at glusterfs1:~$ sudo rm
> "/data/brick1/gv0/prd/drupal-files-prd/inline-images/small - main building
> 1_0.jpg"
>
> user at glusterfs1:~$ stat
> /glusterfs/prd/drupal-files-prd/inline-images/"small - main building
> 1_0.jpg"
>   File: /glusterfs/prd/drupal-files-prd/inline-images/small - main
> building 1_0.jpg
>   Size: 6296651         Blocks: 12299      IO Block: 131072 regular file
> Device: 2dh/45d Inode: 10018406470555949185  Links: 1
> Access: (0664/-rw-rw-r--)  Uid: (42333178/ UNKNOWN)   Gid: (41000002/
> UNKNOWN)
> Access: 2022-11-22 11:58:10.080206283 +0100
> Modify: 2022-05-12 17:00:41.000000000 +0200
> Change: 2022-11-22 12:41:18.095579069 +0100
>  Birth: -
>

Seems to have worked, but now we want to verify / confirm the repair, and
use md5sum to compare the file between our thee glusterfs servers:

user at glusterfs1:~$ sudo find /data/brick1/gv0/.glusterfs -name
> 9be5eecf-5ad8-4256-8b08-879aecf65881
> /data/brick1/gv0/.glusterfs/9b/e5/9be5eecf-5ad8-4256-8b08-879aecf65881
> /data/brick1/gv0/.glusterfs/quarantine/9be5eecf-5ad8-4256-8b08-879aecf65881
>
> user at glusterfs1:~$ sudo md5sum
> /data/brick1/gv0/.glusterfs/9b/e5/9be5eecf-5ad8-4256-8b08-879aecf65881
> d41d8cd98f00b204e9800998ecf8427e
>  /data/brick1/gv0/.glusterfs/9b/e5/9be5eecf-5ad8-4256-8b08-879aecf65881
>
> user at glusterfs1:~$ sudo md5sum
> /data/brick1/gv0/.glusterfs/quarantine/9be5eecf-5ad8-4256-8b08-879aecf65881
> d41d8cd98f00b204e9800998ecf8427e
>  /data/brick1/gv0/.glusterfs/quarantine/9be5eecf-5ad8-4256-8b08-879aecf65881
>

but then on brick2 and brick3:

user at glusterfs2:~$ sudo md5sum
/data/brick1/gv0/.glusterfs/9b/e5/9be5eecf-5ad8-4256-8b08-879aecf65881
d4927e00e0db4498bcbbaedf3b5680ed
 /data/brick1/gv0/.glusterfs/9b/e5/9be5eecf-5ad8-4256-8b08-879aecf65881

user at glusterfs3:~$ sudo md5sum
/data/brick1/gv0/.glusterfs/9b/e5/9be5eecf-5ad8-4256-8b08-879aecf65881
d4927e00e0db4498bcbbaedf3b5680ed
 /data/brick1/gv0/.glusterfs/9b/e5/9be5eecf-5ad8-4256-8b08-879aecf65881

The md5sum does NOT match the repaired server.

What in our logic is wrong, why is this happening?

Some cluster info:

user at glusterfs2:~$ sudo gluster volume get gv0  all | grep self-heal
> cluster.background-self-heal-count       8 (DEFAULT)
> cluster.metadata-self-heal               on
> cluster.data-self-heal                   on
> cluster.entry-self-heal                  on
> cluster.self-heal-daemon                 on (DEFAULT)
> cluster.self-heal-window-size            8 (DEFAULT)
> cluster.data-self-heal-algorithm         (null) (DEFAULT)
> cluster.self-heal-readdir-size           1KB (DEFAULT)
> cluster.disperse-self-heal-daemon        enable (DEFAULT)
> disperse.self-heal-window-size           32 (DEFAULT)
>

glusterfs 10.1 running on ubuntu 22.04.01 x86_64.

Any help would be appreciated!

MJ
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