[Duplicity-talk] "tarfile.ReadError: unexpected end of data" when restoring

[Jerry Raj]

Hello,
I have some files backed up on a B2 bucket. The backup was done in
2016 and I don't recall seeing any errors when running the backup. A
bunch of incrementals were also run after that. Now, while trying to
restore from the backup, it writes a bunch of files and then prints
this error:

Writing folder jun 04/19.jpg of type reg
Releasing lockfile b'/root/.cache/duplicity/oldpics/lockfile'
Removing still remembered temporary file
/tmp/duplicity-g54acfp_-tempdir/mkstemp-0q8ek77p-1
Removing still remembered temporary file
/tmp/duplicity-g54acfp_-tempdir/mktemp-c6rtyy0l-15
Removing still remembered temporary file
/tmp/duplicity-g54acfp_-tempdir/mktemp-wvy4ygnk-16
Releasing lockfile b'/root/.cache/duplicity/oldpics/lockfile'
Traceback (innermost last):
  File "/usr/bin/duplicity", line 106, in <module>
    with_tempdir(main)
  File "/usr/bin/duplicity", line 92, in with_tempdir
    fn()
  File "/usr/lib/python3/dist-packages/duplicity/dup_main.py", line
1538, in main
    do_backup(action)
  File "/usr/lib/python3/dist-packages/duplicity/dup_main.py", line
1618, in do_backup
    restore(col_stats)
  File "/usr/lib/python3/dist-packages/duplicity/dup_main.py", line
723, in restore
    if not patchdir.Write_ROPaths(globals.local_path,
  File "/usr/lib/python3/dist-packages/duplicity/patchdir.py", line
578, in Write_ROPaths
    for ropath in rop_iter:
  File "/usr/lib/python3/dist-packages/duplicity/patchdir.py", line
541, in integrate_patch_iters
    for patch_seq in collated:
  File "/usr/lib/python3/dist-packages/duplicity/patchdir.py", line
407, in yield_tuples
    setrorps(overflow, elems)
  File "/usr/lib/python3/dist-packages/duplicity/patchdir.py", line
396, in setrorps
    elems[i] = next(iter_list[i])
  File "/usr/lib/python3/dist-packages/duplicity/patchdir.py", line
135, in difftar2path_iter
    multivol_fileobj.close()  # aborting in middle of multivol
  File "/usr/lib/python3/dist-packages/duplicity/patchdir.py", line
264, in close
    if not self.addtobuffer():
  File "/usr/lib/python3/dist-packages/duplicity/patchdir.py", line
248, in addtobuffer
    self.buffer += fp.read()
  File "/usr/lib/python3.8/tarfile.py", line 684, in read
    raise ReadError("unexpected end of data")
 tarfile.ReadError: unexpected end of data

It then just hangs there and does not proceed, I have to ctrl-C to
exit. Is there some way I can recover at least some of the remaining
files? "duplicity list-current-files" returns over 700 files, but only
240 are written before it errors out.

FWIW, running restore with -vd provides this summary:

Collection Status
-----------------
Connecting with backend: BackendWrapper
Archive dir: /root/.cache/duplicity/oldpics

Found 0 secondary backup chains.

Found primary backup chain with matching signature chain:
-------------------------
Chain start time: Sat Oct 15 13:36:44 2016
Chain end time: Wed Mar 29 22:10:38 2017
Number of contained backup sets: 13
Total number of contained volumes: 21
 Type of backup set:                            Time:      Num volumes:
                Full         Sat Oct 15 13:36:44 2016                 5
         Incremental         Sun Jan  8 08:48:27 2017                 5
         Incremental         Sun Jan  8 09:19:42 2017                 1
         Incremental         Mon Jan  9 07:03:47 2017                 1
         Incremental         Mon Jan 16 19:34:53 2017                 1
         Incremental         Thu Jan 19 21:21:56 2017                 1
         Incremental         Tue Feb  7 05:33:27 2017                 1
         Incremental         Tue Feb  7 05:39:58 2017                 1
         Incremental         Tue Feb  7 05:59:27 2017                 1
         Incremental         Sat Feb 11 04:57:12 2017                 1
         Incremental         Wed Mar 29 17:41:50 2017                 1
         Incremental         Wed Mar 29 17:55:07 2017                 1
         Incremental         Wed Mar 29 22:10:38 2017                 1
-------------------------
No orphaned or incomplete backup sets found.

Any help is appreciated!

Thanks
-Jerry