Hello,

On 17/06/2019 00:43, backu...@kosowsky.org wrote:
> I'm not even sure how the above even happens given that:
> 1. 20archive.~1~ is nowhere on my existing filesystem (and probably
>    only existed transiently a few months back while I was editing the
>    20archive file since I typically erase the emacs backups right away
>
>    I can verify this by running 'find' or 'ls' as user root.
>    Similarly, for 'locate' and 'lsof'.
>    The file simply doesn't exist!
>
> 2. 20archive.~1~ doesn't appear in any prior backup.
>    So not even sure how backuppc can know about it as it's only
>    existence seems to be in the strange error log.
>
> So how the heck does backuppc find a non-existent file even before
> it goes on to claim that is has "vanished"?
> Where could it possibly be finding this long ago deleted file?

We have exactly this same haunted-Backuppc problem. Following is a copy
of our may 22d message :
---------------
We are seeing weird rsync/file vanished errors. A short example :

This is the rsync child about to exec /usr/bin/rsync_bpc
Xfer PIDs are now 12922,12924
xferPids 12922,12924
[ skipped 18 lines ]
file has vanished: "/root/libpcre2-8.pc"
file has vanished: "/root/libpcre2-32.pc"
file has vanished: "/root/Makefile"
file has vanished: "/root/libpcre2-posix.pc"
file has vanished: "/root/libtool"
file has vanished: "/root/config.log"
file has vanished: "/root/src"
file has vanished: "/root/config.status"
file has vanished: "/root/libpcre2-16.pc"
file has vanished: "/root/pcre2-config"
[ skipped 423 lines ]
file has vanished:
"/usr/portage/app-crypt/heimdal/files/heimdal_build-headers-before-use.patch"
file has vanished:
"/usr/portage/app-crypt/heimdal/files/heimdal_fix-db60.patch"
file has vanished:
"/usr/portage/app-crypt/heimdal/files/heimdal_hcrypto.patch"
rsync_bpc: fstat
"/usr/portage/app-crypt/heimdal/files/heimdal_build-headers-before-use.patch"
failed: No such file or directory (2)
rsync_bpc: fstat
"/usr/portage/app-crypt/heimdal/files/heimdal_fix-db60.patch" failed: No
such file or directory (2)
rsync_bpc: fstat
"/usr/portage/app-crypt/heimdal/files/heimdal_hcrypto.patch" failed: No
such file or directory (2)

Those messages are weird because :

1/ for the "/root/xxx" ones, the designated files *do not exist* in the
directory, before, during or after the backup.

2/ for the "/usr/portage/yyy" messages, the files do exist before,
during and after the backup.
---------------

Same as written by OP : those "missing files" have no existence
whatsoever on the target system *or* do exist without any doubt.

> This is almost spooky...

Any hint ?
Or the next step will be to call an exorcist.

-- 
Pierre-Yves Bonnetain-Nesterenko
B&A Consultants - Sécurité informatique - www.ba-consultants.fr
Tel. : +33 (0) 563 277 241 - Fax : +33 (0) 567 737 829


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