[Digikam-devel] [digikam] [Bug 338724] New: Symlink from one collection to another causes high CPU usage, freeze and DB lockup errors

[Adrian Dziubek]

https://bugs.kde.org/show_bug.cgi?id=338724

            Bug ID: 338724
           Summary: Symlink from one collection to another causes high CPU
                    usage, freeze and DB lockup errors
           Product: digikam
           Version: 4.2.0
          Platform: Archlinux Packages
                OS: Linux
            Status: UNCONFIRMED
          Severity: minor
          Priority: NOR
         Component: Database
          Assignee: digikam-devel at kde.org
          Reporter: adrian.dziubek at gmail.com

My local collections include: 
- a path to separate partition with few hundred GB pictures and 
- a path to my desktop folder, where I ocassionaly put some pictures.

Recently I added a symlink on my desktop to quickly get to the folder with data
which is a parent directory of my collection of pictures. When I ran digikam
few days after:
- it took a few minutes to show any pictures,
- switching to other albums freezed the UI for few seconds,
- after switching albums it wasn't showing any thumbnails,
- htop showed two digikam processes eating 100% CPU.
- I killed it and ran it in console and the output showed output showed
multiple lines being logged (about 3 times a second):
checkRetrySQLiteLockError: Detected locked database file. There is an active
transaction. Waited but giving up now.

I killed digikam, I removed the symlink and everything went back to normal.

Reproducible: Always

Steps to Reproduce:
1. add two folders including images to collection,
2. add symlink from one to parent of another.


Actual Results:  
A big freeze.

Expected Results:  
Normal operation: either not following the symilnks or treating them as links
to albums.

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