[Akonadi] [Bug 341884] New: dozens of duplicate mails in ~/.local/share/akonadi/file_db_data

[m.eik michalke]

https://bugs.kde.org/show_bug.cgi?id=341884

            Bug ID: 341884
           Summary: dozens of duplicate mails in
                    ~/.local/share/akonadi/file_db_data
           Product: Akonadi
           Version: 1.13.0
          Platform: Kubuntu Packages
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: NOR
         Component: general
          Assignee: kdepim-bugs at kde.org
          Reporter: m at reaktanz.de

i noticed that in my ~/.local/share/akonadi/file_db_data folder there were more
than 150000 (150k) mails. a lot of them were duplicates of the same mail,
sometimes 70 copies and more: they all had the same base name/number and ended
in _r0 to _r7x, and diff revealed they are all identical copies.

Reproducible: Always

Steps to Reproduce:
it's a standard kubuntu setup of kmail, using the PPA backpurts packages
(4.14.2) with two IMAP resources.

Actual Results:  
~/.local/share/akonadi/file_db_data is crowded with duplicate mail copies.

Expected Results:  
i get it that ~/.local/share/akonadi/file_db_data should just be a cache,
akonadi should not copy the same mail over and over again.

if akonadi is aware of some mail already being present (the appended numbering
demonstrates that), it could simply use the existing copy for whatever it is
doing, or at least clean up afterwards. this is an immense waste of disk space.
whatever the circumstances, this clearly shouldn't happen.

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