[Bug 310109] New: akonadictl fsck: Cleaning up missing external file *

[Christian Mollekopf]

https://bugs.kde.org/show_bug.cgi?id=310109

            Bug ID: 310109
          Severity: normal
           Version: unspecified
          Priority: NOR
          Assignee: kdepim-bugs at kde.org
           Summary: akonadictl fsck: Cleaning up missing external file *
    Classification: Unclassified
                OS: Linux
          Reporter: mollekopf at kolabsys.com
          Hardware: Other
            Status: NEW
         Component: server
           Product: Akonadi

I already had a couple of akonadictl fsck runs, which resulted in a bunch of of
missing external parts to be found (mostly on items in (disconnected) imap
resources I think, not sure if solely in such items though).
I have no idea how that can happen and the first guess of a faulty filesystem
seems unlikely that I'm having these problems since months and the system is
otherwise running just fine. I had to shutdown the computer a couple of time
when sleep failed or so, so that could be one reason.

I'm not sure if we can avoid the problem, but we have to be able to deal with
it at least. akonadictl fsck can already detect the missing files, and clear
the payload, so it's downloaded again once the item is requested (we might want
to do that right away as part of the fix).
At least with some views missing parts can block a whole collection from being
viewed, e.g. in akonadiconsole where selecting a folder always results in an
itemfetch of the fullpayload 1:*, meaning the job will fail even if only one
single item has a missing external part and it cannot be downloaded atm.

So there might be several different approaches, such as doing partial fetches
in ItemFetchJob, detecting the problem in the background and fixing it before
somebody notices (e.g. running fsck on startup), or avoid the problem
altogether if thats possible at all.

Reproducible: Sometimes

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