Rsync checksum issue

[Laurent B]

I think I found the problem.

Thanks to a ldd, I checked the libraries rsync is relying on and I found 
out different versions for libxxhash between my two endpoints:

- on the target:

root at nas:~/sauvegardes-manuelles# dpkg -l libxxhash0
Souhait=inconnU/Installé/suppRimé/Purgé/H=à garder
| État=Non/Installé/fichier-Config/dépaqUeté/échec-conFig/H=semi-installé/W=attend-traitement-déclenchements
|/ Err?=(aucune)/besoin Réinstallation (État,Err: majuscule=mauvais)
||/ Nom              Version      Architecture Description
+++-================-============-============-=================================
ii  libxxhash0:amd64 0.7.3-2      amd64        shared library for xxhash

- on the source:

root at laurent-laptop:/home/laurent/perso/Avion# dpkg -l libxxhash0
Souhait=inconnU/Installé/suppRimé/Purgé/H=à garder
| État=Non/Installé/fichier-Config/dépaqUeté/échec-conFig/H=semi-installé/W=attend-traitement-déclenchements
|/ Err?=(aucune)/besoin Réinstallation (État,Err: majuscule=mauvais)
||/ Nom              Version      Architecture Description
+++-================-============-============-=================================
ii  libxxhash0:amd64 0.7.4-1      amd64        shared library for xxhash

I updated this library on both endpoint and everything is working well.

root at nas:~/sauvegardes-manuelles# dpkg -l libxxhash0
Souhait=inconnU/Installé/suppRimé/Purgé/H=à garder
| État=Non/Installé/fichier-Config/dépaqUeté/échec-conFig/H=semi-installé/W=attend-traitement-déclenchements
|/ Err?=(aucune)/besoin Réinstallation (État,Err: majuscule=mauvais)
||/ Nom              Version      Architecture Description
+++-================-============-============-=================================
ii  libxxhash0:amd64 0.8.0-1      amd64        shared library for xxhash


This is weird since a md5 sum is supposed to be a md5 sum...

Thanks for your time,

Laurent

On 16/12/2020 06:19, Kevin Korb via rsync wrote:
> Either that or you have a hardware problem causing the checksum routine
> to return the wrong result.
>
> On 12/15/20 11:47 PM, Dan Stromberg via rsync wrote:
>> On Tue, Dec 15, 2020 at 3:25 AM Laurent B via rsync
>> <rsync at lists.samba.org <mailto:rsync at lists.samba.org>> wrote:
>>
>>      Dear all,
>>
>>      I'm encountering a problem with one of my backup. For some files, the
>>      checksum calculation is failing leading to the following error :
>>
>> It sounds a little like a bug, but perhaps if you share the command
>> you're using for the backup?
>>