[Samba] Samba drops connection on "large" files 2GB+

[Jeremy Allison]

On Wed, Mar 08, 2023 at 08:54:24AM +0100, Leon Benthaus via samba wrote:
>Dear all,
>
>I still have CentOS7 running with the latest Samba Version available 
>for it (samba-4.10.16-20.el7)
>I'm experiencing a really strange issue. When I copy a file larger 
>than 2GB I  always get a network
>drop. It just stops at around 1,74gb. The logs didn't show something 
>in default logging level and
>are overwhelming at 5. An interesting detail is: If I pause the copy 
>process every other second
>I can get the whole file copied. If I let it run at full speed it is 
>not working. Any idea? I already
>played around with socket options and stuff. No change. The shares is 
>located on a xfs formatted drive.

Might be:

https://bugzilla.samba.org/show_bug.cgi?id=15261

Contains a patch you might try.