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List:       kde-bugs-dist
Subject:    [kmail2] [Bug 389638] When moving imported maildir folders, before they are completely written to di
From:       quazgar <bugzilla_noreply () kde ! org>
Date:       2018-01-30 17:10:56
Message-ID: bug-389638-17878-5fMp3MGdQb () http ! bugs ! kde ! org/
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https://bugs.kde.org/show_bug.cgi?id=389638

quazgar <quazgar@posteo.de> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
          Component|composer                    |commands and actions
     Ever confirmed|0                           |1
            Summary|When moving several maildir |When moving imported
                   |folders, some arrive empty, |maildir folders, before
                   |losing all the mails.       |they are completely written
                   |                            |to disk, they arrive empty,
                   |                            |losing all the mails.
             Status|UNCONFIRMED                 |CONFIRMED

--- Comment #2 from quazgar <quazgar@posteo.de> ---
OK, I think I can fully reproduce the problem now and have found its reason:

Steps to reproduce
------------------
1) Create a KMail archive, it should contain a folder ("somedir") and some
subfolders and sufficiently many emails (in my case, a total of 700 emails was
enough).
2) Create a target maildir directory, e.g. "target"
3) Import the archive into a folder, e.g. "imported"
4) Shortly after the import has finished, move the imported folders, e.g.
"imported/somedir" to "target".

Expected result
---------------
1) The moved folders should have an identical content compared to the archive's
source.

Actual result
-------------
1) Some, or all, of the emails are missing.

Workaround
----------
1) Wait until the folder structure on the file system exists and has been
populated.  This can be checked e.g. by watching the output of:

find ~/.local/share/akonadi_maildir_resource_0/.imported.directory/ -type f |
wc -l

2) Only when the number looks reasonable and does not change any more, start
moving the folder.


Notes
-----
Since in this case, the bug only happens after importing mails, maybe the
severity can be downgraded, because no data is lost as long as the archive is
still available and the problem has been noticed soon enough.

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