[korganizer] [Bug 411525] New: Editing existing events in KOrganizer suddenly stopped working, restarting Akonadi helped

[Rickard Westman]

https://bugs.kde.org/show_bug.cgi?id=411525

            Bug ID: 411525
           Summary: Editing existing events in KOrganizer suddenly stopped
                    working, restarting Akonadi helped
           Product: korganizer
           Version: 5.7.3
          Platform: Kubuntu Packages
                OS: Linux
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: incidence editors
          Assignee: kdepim-bugs at kde.org
          Reporter: rwestman at bredband.net
  Target Milestone: ---

SUMMARY

I opened KOrganizer to edit an event that I'd dealt with, and thus didn't need
to be reminded of any more.  At the time, it had an active reminder that was
suspended for 30 minutes, and a number of scheduled reminders for the next few
days.  When I double-clicked on the event, the event editor didn't open as it
normally does.  Double-clicking on other events did not open the event editor
either, and neither did selecting events and choosing "Edit" in the Action
menu.  The mouse-over information for the event displayed OK, so it's not that
the event information could be accessed at all.  

Looking at the .xsession-errors log, I could see the following error message
occuring every time I attempted to open the editor:

  org.kde.pim.incidenceeditor: free slot calculation: invalid range. 
  range(  0 ) / mSlotResolutionSeconds( 900 ) =  0


As a workaround, I first tried restarting KOrganizer by selecting "Quit" in its
main meny, and launching it again.  The problem persisted.  I recalled that
another spurious KOrganizer malfunction corrected itself when I restarted
Akonadi, so I tried that ("akonadictl stop", waiting for a few seconds, then
"akonadictl start").  This did the trick, and I no longer see the problem.  I
noticed that the error message quoted above still showed up every time I opened
the editor for an event, so maybe it's unrelated to the actual problem.  


STEPS TO REPRODUCE

I tried to reproduce the problem, but couldn't.  I've only seen it once, but
I've seen several other spurious KOrganizer problems that resolve when Akonadi
is restarted.  Perhaps every other week or so in a long-running session.  

Despite being irreproducible, I thought I'd report it, since a non-technical
user would not think of restarting Akonadi, resulting in a quite serious
persisting problem.  If nothing can be done to fix the bug, then at least the
problem and a workaround can be found in this report.


OBSERVED RESULT

Event editor didn't open.


EXPECTED RESULT

Event editor to open.


SOFTWARE/OS VERSIONS

Linux/KDE Plasma: Kubuntu 18.04
KDE Plasma Version: 5.12.8
KDE Frameworks Version: 5.44.0
Qt Version: 5.9.5


ADDITIONAL INFORMATION

Reported this is a KOrganizer / incidence editor bug, since that's where I
experienced the problem as an end-user.  I don't know whether the fact that
restarting Akonadi helped means that the problem is more likely to be there, or
in some other general infrastructure.  Please edit if you know better.

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