Emby: “Scan media library” hangs tasks stuck running

[Belenkiy 2]

Hi! I’m running Emby Server on Synology (DSM7.3.2 , package, x86_64). I’m trying to fix a long-standing issue: library scans hang and sometimes artwork doesn’t load / UI feels stalled.

Environment

• Device: Synology NAS (DSM 7.3.2-86009 update 1), volume is Btrfs (/volume1)

• Emby Server: 4.9.3.0, (also tested 10.0.4 and 10.0.5version, issue persists)

• ProgramData: /var/packages/EmbyServer/var → symlink to /volume1/@appdata/EmbyServer

• Libraries:

  TV: /volume1/video/Serials

  Movies: /volume1/video/Movies

Symptoms

• “Scan media library” hangs

• Logs stop showing “next step” as if the previous step was successful but the next one did not start:

• In logs Emby completes some scan steps, then no further “start next step” entries appear for a long time, while server still shows “Scan media library” running.

What I already checked / tried

• File system is fast; find /volume1/video/Serials -type f completes quickly.

• Permissions: ProgramData cache/metadata folders are owned by emby:emby; emby user can write to them (su emby -c touch ... OK).

• Removed local NFO files temporarily and disabled NFO metadata reader to avoid broken/empty NFO overriding online metadata.

• Disabled UPnP mapping in Emby (auto port mapping) to prevent external influence.

Questions

Any recommended diagnostics to identify where the scan is blocked (e.g. enabling debug for TaskManager / library scanner)?

embyserver.txt logs around scan start and the hang point

Thanks!

embyserver.txt