Error when using btrfs subvolume snapshot & send | receive

["René Fricke-Müller" <rene.fricke94@gmail.com>]

Hello,

I have some trouble using btrfs snapshots on Ubuntu 19.10.

I am creating snapshots of my /-subvolume and use send | receive for 
incremental transferring. Sometimes I get errors like "ERROR: cannot 
open /media/Backup/OS/snapshots/snap_2020-05-13_11:39/o13170-19818-0: No 
such file or directory"

When I look deeper with the -v option, it seems like btrfs is creating a 
folder or something, moves it and then tries to rename the original folder.

The error occures on different devices, but only when I make snapshots 
of the root of my os subvolume. The error occures only from time to time 
(perhaps every 5th to 15th snapshot) the only solution to send a new 
snapshot complete and then send incremental snapshots.

I tried different kernels:
Currently I am using 5.3.0-51-generic on one device but also tried 5.5 
and 5.6.11.

I found this topic on github, where some people have the same errors. 
(but I am using an own script, not that program)

https://github.com/digint/btrbk/issues/223 
<https://github.com/digint/btrbk/issues/223>


Can you confirm this error and/or help me?


Kind Regards

René