extended stat: [Errno 7] Argument list too long: '<FD 15>'

[raywood1]

Running sudo borg create --progress --stats --compression lz4 /media/veracrypt2/BorgRepoJan::2022-01-01 /media/veracrypt1/2022-01-01 produces the titular error for three .eml files; thousands of their companions sail on without complaint. Numerous previous runs of the same command, or something similar to it, have produced no such error for these same .emls, nor for any other files. This is the third archive in the repository. I am not yet able to determine whether those or any other files are missing from a restore of this archive.

[infectormp]

Did you run borg from a bash script? Can you provide full script and also full error output from borg.

[raywood1]

This is Borg 1.2. My search doesn't lead to documentation on how to do a full stack trace.

[ThomasWaldmann]

Please give the output of borg -V.

If it is a source file error, it is only output in an abbreviated form without traceback.

[ThomasWaldmann]

If you can reproduce the issue, you can try what option makes the problem go away:

• --noflags
• --noacls
• --noacls and --noxattrs

See the stat_ext_attrs code in archive.py about this. One could remove the line with backup_io('extended stats'): there and outdent the block below it to make it crash with a traceback.

[ThomasWaldmann]

That kind of error msg is rather something i would expect from shell argument expansion, e.g. if you give * and it gets expanded to way too many filenames so the shell command can not handle it any more.

But borg does not use any shell commands nor any expansion there, just fs / xattrs / acls api upon a single file. There could be more or less xattrs and acls though, but still this rather strange and unclear.

[ThomasWaldmann]

I am not familiar with veracrypt and on what levels it operates (especially: if it interferes with fs-level api or if it just works on block level). Depending on that, it might be worth trying if the issue reproduces with same source files, but without using veracrypt.