[Akonadi] [Bug 406958] New: Unreferenced files in file_db_data

[Martin Steigerwald]

https://bugs.kde.org/show_bug.cgi?id=406958

            Bug ID: 406958
           Summary: Unreferenced files in file_db_data
           Product: Akonadi
           Version: 5.9.2
          Platform: Other
                OS: Linux
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: Maildir Resource
          Assignee: kdepim-bugs at kde.org
          Reporter: Martin at Lichtvoll.de
  Target Milestone: ---

I use Akonadi version 5.9.3 (18.04), not selectable in bug tracker under
"Version"

SUMMARY
I switched to PostgreSQL recently, with a completely clear
~/.local/share/akonadi (well except "db_data" directory switch I created before
starting Akonadi for the first time after changing database backend).

Just a few weeks later I have:

Found 8951 external files.
Found 2069 external parts.
Found unreferenced external file:
/home/martin/.local/share/akonadi/file_db_data/27/231727_r1
Found unreferenced external file:
/home/martin/.local/share/akonadi/file_db_data/37/85637_r2
Found unreferenced external file:
/home/martin/.local/share/akonadi/file_db_data/69/230869_r1
[… >6000 of those lines ]
Found unreferenced external file:
/home/martin/.local/share/akonadi/file_db_data/76/229676_r1
Found unreferenced external file:
/home/martin/.local/share/akonadi/file_db_data/15/85215_r2
Found unreferenced external file:
/home/martin/.local/share/akonadi/file_db_data/75/172275_r2
Found unreferenced external file:
/home/martin/.local/share/akonadi/file_db_data/36/232836_r1
Moved 6882 unreferenced files to lost+found.

This is with Maildir filed by POP3 resources.

STEPS TO REPRODUCE
I have no idea.

Probably just use Akonadi for a while.

Maybe related to this is:

Out of frustration with Akonadi not responding to KMail requests while doing
some background processing I did 'akonadictl stop' and after a minute or so as
there was still a PostgreSQL process around… friendly stopped it with a
SIGTERM.

This may have contributed to the situation.



OBSERVED RESULT
Unreferenced external files.

EXPECTED RESULT
No unreferences external files during normal operation.

I thought one of the main causes for those have been fixed, but it is still or
again happening.

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: 5.9.3
(available in About System)
KDE Plasma Version: 5.14.5
KDE Frameworks Version: 5.54.0
Qt Version: 5.11.3

ADDITIONAL INFORMATION
Bug #282160 is related, but kind of outdated, still referencing Baloo.

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