discarr/docs/reference/troubleshooting.md
pyr0ball dc768a8dbb docs: add MkDocs site
14-page documentation site covering installation, quick start,
full config reference, Sonarr/Radarr/qBittorrent/Tdarr integrations,
ffmpeg/HandBrake transcoder setup, SSH transcode workers, disc format
reference, and troubleshooting.

Stack: mkdocs-material 9.x (MIT), pinned <10 to avoid 2.0 licence wall.
2026-05-27 09:45:29 -07:00

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Troubleshooting

Discarr won't start

Check Node.js version:

node --version  # must be 18+

Check for port conflict:

ss -tlnp | grep 8603
# Change port with: PORT=8604 node server.js

Check logs (if running as a service):

journalctl -u discarr -f

Scan returns no titles

ffprobe not found:

which ffprobe  # must be in PATH
ffprobe -version

Disc structure not recognised:

  • Ensure the path points to the directory containing VIDEO_TS or BDMV, not inside it
  • For ISOs, pass the full path including the .iso extension
  • Check read permissions: ls -la /path/to/disc

Encrypted DVD:

dpkg -l libdvd-pkg 2>/dev/null || rpm -q libdvdcss 2>/dev/null
# Reinstall if missing — see Installation guide

Encode fails immediately

ffmpeg not found:

which ffmpeg && ffmpeg -version

HandBrake preset not found:

HandBrakeCLI --preset-list | grep "H.265"

Check HANDBRAKE_PRESET matches exactly (case-sensitive).

Disk space:

df -h /tmp ~/.local/share/discarr
# Full HEVC encodes need 50100 GB of temp space for large discs

Sonarr/Radarr not importing after encode

Check hook scripts are executable:

ls -la /opt/discarr/scripts/
chmod +x /opt/discarr/scripts/*.sh

Test the hook manually:

DISCARR_URL=http://127.0.0.1:8603 /opt/discarr/scripts/sonarr-notify.sh

Check API key:

curl -s "http://your-sonarr-host:8989/sonarr/api/v3/system/status" \
  -H "X-Api-Key: your-api-key" | python3 -m json.tool | head -5

Check Sonarr logs:

Sonarr: System → Logs — look for connection errors from the Custom Script hook.


SSH transcode not working

Test SSH connection:

ssh -i ~/.ssh/id_ed25519 user@remote-host echo "OK"

Check ffmpeg on remote:

ssh user@remote-host which ffmpeg

Check disk space on remote:

ssh user@remote-host df -h /media

Jobs stuck in queue after restart

The queue file persists across restarts at ~/.local/share/discarr/pending-queue.json.

To clear a stuck job:

# Edit the queue file and remove the stuck entry
$EDITOR ~/.local/share/discarr/pending-queue.json
systemctl restart discarr

Or clear the whole queue:

echo '[]' > ~/.local/share/discarr/pending-queue.json
systemctl restart discarr