[Digikam-devel] Strange crashes

[Gilles Caulier]

Well, the question is why it's work with dolphin and konqueror and not
in digiKam, as Andi said in a private mail. Code relevant is here :

1/ Dolphin and konqueror use it from a kioslave :

http://lxr.kde.org/source/KDE/kdebase/runtime/kioslave/thumbnail/thumbnail.cpp#739

2/ digiKam from a separated thread:

http://lxr.kde.org/source/extragear/graphics/digikam/libs/threadimageio/thumbnailcreator.cpp#268

Possible issue : ::rename is not re-entrant and crash digiKam (multi-threading)

Question : if i remember, Gwenview use also multithreading to render
thumbs. Look like there is an option in setup to clean up
~/.thumbnails dir when program session is down. Andi, can you test
with Gwenview on your computer ?

Gilles

2009/5/21 Matthias Welwarsky <matze at welwarsky.de>:
> On Thursday 21 May 2009 18:40:29 Marcel Wiesweg wrote:
>> > Have you deleted / renamed your ~/.thumbnails folder?
>> > Already generated thumbnails from the past (before the KDE::rename
>> > patches) are working perfectly fine here, too.
>> >
>> > What happens when you rename the thumbnails folder so that all thumbs are
>> > really generated new?
>> >
>> > I always get
>> > digikam(7372)/digikam (core) Digikam::ThumbnailCreator::load: Cannot
>> > rename thumb file (
>> > "/tmp/kde-andi/415adced8a4644d971d5c6706c2abc90-digikam- wS7372.png" )
>> > digikam(7372)/digikam (core) Digikam::ThumbnailCreator::load: to (
>> > "/home/andi/.thumbnails/large/415adced8a4644d971d5c6706c2abc90.png" )...
>> >
>> > My /tmp is on my root partition (ext4), /home is reiserfs.
>> > I also changed /tmp to be the tmpfs (so that it is a ramdisk actually),
>> > but still the same error.
>>
>> I can confirm this. New thumbnails are not stored. The error messages as
>> above appear. /tmp is on a different partition than /home, both ext4.
>
> Ah. So the rename is not working across file systems :-) Maybe because it uses
> rename(2)? Take a look at the man page.
>
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