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webui Search causes application freeze (5.2.0alpha1) #17273
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starred/qBittorrent#17273
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Originally created by @bparkin1283 on GitHub (Nov 4, 2025).
qBittorrent & operating system versions
5.2.0alpha1 Docker aarch64 GNU/Linux
What is the problem?
cpu pegs at 100%, webui becomes unresponsive when trying to access Search in webui
Steps to reproduce
start qbittorrent-nox
login to webui
click Search tab
cpu pegs at 100%, webui becomes unresponsive.
Additional context
added torrents via magnet and .torrent and it seems to work. nothing shows in the logs corresepnding to navigiating to Search, even after adding FileLogger\Level=4 to qBittorrent.conf
[Application]
FileLogger\Age=1
FileLogger\AgeType=1
FileLogger\Backup=true
FileLogger\DeleteOld=true
FileLogger\Enabled=true
FileLogger\MaxSizeBytes=66560
FileLogger\Path=/config/qBittorrent/data/logs
FileLogger\Level=4
Log(s) & preferences file(s)
(N) 2025-11-04T22:14:43 - qBittorrent v5.2.0alpha1 started. Process ID: 7
(N) 2025-11-04T22:14:43 - Using config directory: /config/qBittorrent/config
(N) 2025-11-04T22:14:43 - Trying to listen on the following list of IP addresses: "0.0.0.0:6881,[::]:6881"
(I) 2025-11-04T22:14:43 - Peer ID: "-qB5200-"
(I) 2025-11-04T22:14:43 - HTTP User-Agent: "qBittorrent/5.2.0alpha1"
(I) 2025-11-04T22:14:43 - Distributed Hash Table (DHT) support: ON
(I) 2025-11-04T22:14:43 - Local Peer Discovery support: ON
(I) 2025-11-04T22:14:43 - Peer Exchange (PeX) support: ON
(I) 2025-11-04T22:14:43 - Anonymous mode: OFF
(I) 2025-11-04T22:14:43 - Encryption support: ON
(I) 2025-11-04T22:14:43 - Successfully listening on IP. IP: "127.0.0.1". Port: "TCP/6881"
(I) 2025-11-04T22:14:43 - Successfully listening on IP. IP: "127.0.0.1". Port: "UDP/6881"
(I) 2025-11-04T22:14:43 - Successfully listening on IP. IP: "172.21.0.2". Port: "TCP/6881"
(I) 2025-11-04T22:14:43 - Successfully listening on IP. IP: "172.21.0.2". Port: "UDP/6881"
(I) 2025-11-04T22:14:43 - Successfully listening on IP. IP: "::1". Port: "TCP/6881"
(I) 2025-11-04T22:14:43 - Successfully listening on IP. IP: "::1". Port: "UDP/6881"
(I) 2025-11-04T22:14:43 - UPnP/NAT-PMP support: ON
(I) 2025-11-04T22:14:44 - IP geolocation database loaded. Type: DBIP-Country-Lite. Build time: Sat Nov 1 02:28:18 2025.
(N) 2025-11-04T22:14:44 - Using built-in WebUI.
(N) 2025-11-04T22:14:44 - WebUI translation for selected locale (en) has been successfully loaded.
(N) 2025-11-04T22:14:44 - WebUI: Now listening on IP: *, port: 8080
(I) 2025-11-04T22:14:44 - Detected external IP. IP:
(N) 2025-11-04T22:19:22 - qBittorrent v5.2.0alpha1 started. Process ID: 8
(N) 2025-11-04T22:19:22 - Using config directory: /config/qBittorrent/config
(N) 2025-11-04T22:19:22 - Trying to listen on the following list of IP addresses: "0.0.0.0:6881,[::]:6881"
(I) 2025-11-04T22:19:23 - Peer ID: "-qB5200-"
(I) 2025-11-04T22:19:23 - HTTP User-Agent: "qBittorrent/5.2.0alpha1"
(I) 2025-11-04T22:19:23 - Distributed Hash Table (DHT) support: ON
(I) 2025-11-04T22:19:23 - Local Peer Discovery support: ON
(I) 2025-11-04T22:19:23 - Peer Exchange (PeX) support: ON
(I) 2025-11-04T22:19:23 - Anonymous mode: OFF
(I) 2025-11-04T22:19:23 - Encryption support: ON
(I) 2025-11-04T22:19:23 - Successfully listening on IP. IP: "127.0.0.1". Port: "TCP/6881"
(I) 2025-11-04T22:19:23 - Successfully listening on IP. IP: "127.0.0.1". Port: "UDP/6881"
(I) 2025-11-04T22:19:23 - Successfully listening on IP. IP: "172.21.0.2". Port: "TCP/6881"
(I) 2025-11-04T22:19:23 - Successfully listening on IP. IP: "172.21.0.2". Port: "UDP/6881"
(I) 2025-11-04T22:19:23 - Successfully listening on IP. IP: "::1". Port: "TCP/6881"
(I) 2025-11-04T22:19:23 - Successfully listening on IP. IP: "::1". Port: "UDP/6881"
(I) 2025-11-04T22:19:23 - UPnP/NAT-PMP support: ON
(I) 2025-11-04T22:19:23 - IP geolocation database loaded. Type: DBIP-Country-Lite. Build time: Sat Nov 1 02:28:18 2025.
(N) 2025-11-04T22:19:23 - Using built-in WebUI.
(N) 2025-11-04T22:19:23 - WebUI translation for selected locale (en) has been successfully loaded.
(N) 2025-11-04T22:19:23 - WebUI: Now listening on IP: *, port: 8080
(I) 2025-11-04T22:19:23 - Detected external IP. IP:
@xavier2k6 commented on GitHub (Nov 8, 2025):
commit???
@bparkin1283 commented on GitHub (Nov 8, 2025):
docker run --rm --entrypoint cat qbittorrent-nox:alpha /sbom.txt
Software Bill of Materials for building qbittorrent-nox
boost 1.86.0
libtorrent-rasterbar git 3ae563b04342a3f7f024a353c2c3335ef613fd22
qBittorrent git
6b3519f4eb@xavier2k6 commented on GitHub (Dec 26, 2025):
@bparkin1283 Have you tried with the latest commit?
CC @Piccirello
@Piccirello commented on GitHub (Dec 26, 2025):
I tested on master and can't reproduce. If this persists on master then posting a profile from your browser devtools would be useful.
@bparkin1283 commented on GitHub (Jan 3, 2026):
Not sure what changed in the environment but my existing 5.2.0alpha1 started working now. Docker issue? Browser Issue? Only thing I noticed is this time (two months later from opening this issue) is that when I went into the Search Plugins... box it was blank. After clicking "Check for updates" this time it didn't freeze and it populated all the plugins. I do not see how it could have been a docker issue or resource issue (if anything I am using more resources compared to two months ago).
Is it possible a default plugin version from Nov was crashing the app?
Most importantly, and the reason I've been tracking these alpha's, .html (eg, limetorrent) seem to work better; but I'm still getting hung up on "Retrieving metadata..." for many items.
@bparkin1283 commented on GitHub (Jan 3, 2026):
good news bad news, i'm getting output in the logs now http.client.InvalidURL: URL can't contain control characters: