RSS Downloader sometimes download the same torrents twice

fireattack commented 1 year ago

qBittorrent & operating system versions

qBittorrent: 4.5.0 x64 Operating system: Windows 10 22H2 (10.0.19045) Qt: 5.15.7 libtorrent-rasterbar: 1.2.18

What is the problem?

Sometimes, QB will try to re-download torrents from RSS downloader that I have downloaded before.

The timeline is like this:

RSS feed updated. A new article found, and it's added to task.
the task is finished.
I deleted the task.
I restarted QB, and it shows it find "ZERO" new article (expected), but somehow, it re-downloads the task that I have already downloaded and removed.

Below is a real-world example I copied from log.

(N) 2023-01-21T23:32:30 - RSS feed at '{RSS URL}' updated. Added 1 new articles.
(N) 2023-01-21T23:32:30 - Added new torrent. Torrent: "{YYY}.mp4"
...
(N) 2023-01-22T00:04:21 - Torrent download finished. Torrent: "{YYY}.mp4"
...
(N) 2023-01-22T01:06:08 - Removed torrent. Torrent: "{YYY}.mp4"
...
(N) 2023-01-22T21:45:07 - RSS feed at '{RSS URL}' updated. Added 0 new articles.
(N) 2023-01-22T21:45:08 - Added new torrent. Torrent: "{YYY}.mp4"

Steps to reproduce

Not reliably reproducible, but see above.

Additional context

I only started to encounter this bug recently, for what it's worth.

Log(s) & preferences file(s)

qBittorrent.ini.txt

developer-wlj commented 1 year ago

I'm in a similar situation to you

qBittorrent & operating system versions

qBittorrent: 4.3.9 x64
Operating system: Ubuntu 20.04

The timeline is like this:

RSS feed updated. A new article found, and it's added to task.
the task is finished.
auto deleted the task
several days later
qb find "ONE" new article(can be sure that the source site is not publishing a new rss)
re-downloads the task

Personal guesswork, used to flag that the completed download of the profile is corrupted, resulting in repeated downloads

fireattack commented 7 months ago

This issue occurs when you subscribe to two RSS feeds with overlapping content.

For example, if you add a category from an RSS source along with an uploader from the same source, there are instances where both feeds may include the same torrent.

The process unfolds as follows:

When the RSS downloader identifies a new torrent available in both subscriptions, it proceeds to download it from one while ignoring the other to avoid creating a duplicate task. However, qBitTorrent still somehow marks the ignored duplicate as "not attempted."

Consequently, if you download a torrent and later delete it, then restart qBitTorrent, it mistakenly believes the torrent (specifically the ignored duplicate) was never downloaded and attempts to download it again.

This behavior is a regression that started around version 4.5.0 or the corresponding version of libtorrent. This issue was not present in previous versions.

qbittorrent / qBittorrent