Unable to resume encrypted backups

Bug #902985 reported by Ross Gayler on 2011-12-11
This bug affects 5 people
Affects Status Importance Assigned to Milestone
Déjà Dup
Michael Terry
deja-dup (Ubuntu)

Bug Description

I have been unable to resume a partial backup. There are two use cases:
1) While running a backup I press the "Resume later" button.
2) Backup fails due to "connection timed out".

In both cases I can see the files that have been added to the backup directory by the halted backup process. The next time I use DD and press "Backup now" I expect the backup to continue from where it left off (with the possible exception of rolling back any files that were only partly backed up). However, what happens is that DD deletes all the files from the previous session and starts from the beginning again.

(BTW these are encrypted backups. I have not tried it without encryption.)

Reproduce the problem:
Get the starting count of files in the backup directory.
Run backup (In my case, always with encryption, and always over a LAN.)
Stop the backup part way through (either by pressing "Resume later" or breaking the network connection)
Get the count of files in the backup directory (should be more than the starting count)
Run backup again (press "Backup now")
Get the count of files in the backup directory once the backup has started uploading (For me the file count has been taken back to the starting count)

Mathias Bynke (mabynke) on 2012-04-03
Changed in deja-dup:
status: New → Confirmed
tags: added: backup
Michael Terry (mterry) wrote :

Confirmed. Only happens with encryption.

Changed in deja-dup:
assignee: nobody → Michael Terry (mterry)
importance: Undecided → High
summary: - Unable to resume backups
+ Unable to resume encrypted backups
Michael Terry (mterry) on 2012-04-10
Changed in deja-dup:
status: Confirmed → Fix Committed
Launchpad Janitor (janitor) wrote :

This bug was fixed in the package deja-dup - 22.0-0ubuntu2

deja-dup (22.0-0ubuntu2) precise; urgency=low

  * debian/patches/allow-resuming-encrypted-backup.patch:
    - When resuming an encrypted backup, don't delete partial backup,
      causing a lot of work to be redone. LP: #902985
 -- Michael Terry <email address hidden> Tue, 10 Apr 2012 15:42:45 -0400

Changed in deja-dup (Ubuntu):
status: New → Fix Released
Michael Terry (mterry) on 2012-04-16
Changed in deja-dup:
milestone: none → 23.1
Michael Terry (mterry) on 2012-06-05
Changed in deja-dup:
status: Fix Committed → Fix Released
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