[digikam] [Bug 337692] New: Template editor with author/rights is extremly slow

[Christian-2]

https://bugs.kde.org/show_bug.cgi?id=337692

            Bug ID: 337692
           Summary: Template editor with author/rights is extremly slow
           Product: digikam
           Version: 4.1.0
          Platform: openSUSE RPMs
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: NOR
         Component: Metadata
          Assignee: [hidden email]
          Reporter: [hidden email]

OS/Release Details:
-------------------
Digikam/Kipi Plugins Release 4.1.0-11.1 (libkexiv2-11 4.11.5-298.11)
with and without MySQl DB (mariadb 5.5.33-2.2, libmysqlclient18 5.5.33-2.2
OpenSuse 13.2 from BuildService KDE:Extra, Windows 8.1 from Installer

Symptoms:
---------------
DigiKam (3 PCs with OpenSuse) freezes when I try to edit an author/rights
template - or gets extremly slow. The template editor is also slow under
Windows with a smaller image database.

Note: The database contains millions of images and a complex tag hierarchy.
No image was selected.

Background:
When I select the option "Write Metadata templates to images" digiKam freezes
for 20 minutes. After that any attempt to edit author/rights templates will
cause the GUI to freeze (I restarted many times). I waited 6 hours but it did
not terminate.

No idea what blocks the editor. I was not able to test if the templates are
applied to images, because I do not want to write outdated template contents.
There is just a single template around that was added a couple of years ago.

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[Christian-2]

https://bugs.kde.org/show_bug.cgi?id=337692

--- Comment #1 from Christian <[hidden email]> ---
Created attachment 87895
  --> https://bugs.kde.org/attachment.cgi?id=87895&action=edit
bt before digikam settings dialog hangs

The backtrace documents my attempt to do a clean install on my distro: after
setting up db connection the dialog to choose a folder for the base collection
hangs. In this example the plasma-desktop crashed after the freeze of the file
dialog, so digikam was able to continue and I tried to set the collection path
again which caused another freeze.

Also the db-dialog hangs, the dialog to define author templates - like all
other dialogs of the digikam settings.

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[Christian-2]

https://bugs.kde.org/show_bug.cgi?id=337692

--- Comment #2 from Christian <[hidden email]> ---
Note - this bug is similar to the issue in Bug 337443 - digikam hangs when
opening the preferences window on the collection management ta
Reported:     2014-07-14 15:40 UTC by Mathias Homann

(In reply to Mathias Homann from comment #0)
> I can't add a collection to digikam, it freezes up when i try to open the
> preferences window.

I suffer from the same symptom using OpenSuse 13.1 with digikam build
14.1.0-1.11. Sometimes I can open further dialogs if I act quickly, but there
is no way e.g. to select the folder of the root collection or to edit the
author template in the settings menu after a couple of seconds.

See attachment with backtrace - this example shows what happens before and
after the freeze of a digikam setting dialog window (in this case: the file
dialog to select collections).

The freeze is not related to a particular window, it also freezes when I try to
change db settings, color profile settings and the like. The KDE desktop is not
blocked, but all digikam windows.

Some additional infos:
- I use nvidia native driver on all workstations
- large filesystems (> 4 TB) with many folders
- on this pc there are two high resolution monitors (2x 2016x1200)

I should contact the package provider. Do not think this package is ready for
production.

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[Christian-2]

https://bugs.kde.org/show_bug.cgi?id=337692

--- Comment #3 from Christian <[hidden email]> ---
The bug is related to specific KDE Settings, large Fonts, or KDE Service
Settings. It is obviously not an migration issue (3.5 - 4.1) or database
issuse.

Proof:
In a virtual machine with a vanilla installation of openSuse 13.1 with a new
user digikam 4.1.0 (build 11.1 and 11.8) and KDE 4.13.3 the settings windows
can be opened, and none of the dialogs (database, collection ...) freezes.

I will try to change KDE Settings similar to the one used on my workstation
where this bug is a severe blocker at time of the installation, but also later
on, as all settings have to be configured in the kede rc file without gui.

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[Christian-2]

https://bugs.kde.org/show_bug.cgi?id=337692

Christian <[hidden email]> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|---                         |MOVED
             Status|UNCONFIRMED                 |RESOLVED

--- Comment #4 from Christian <[hidden email]> ---
This bug was closed because it is not focused on the real cause of the problem:

The digikam 4.x settings window (and collection setup at installation) freezes
once a mysql connection was setup successfully with latest mariadb and mysql
libs at least in OpenSuse 12.3 and 13.1.

This bug is moved to a new one.

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