Thank you.
I found it.
Jan 23, 2021 22:27:42.848 [0x7fd104855700] DEBUG - Skipping over directory 'Library/Application Support/Plex Media Server/Plug-in Support/Caches/com.plexapp.agents.localmedia/HTTP.system/db', as nothing has changed; removing 0 media items from map.
Jan 23, 2021 22:27:42.848 [0x7fd104855700] DEBUG - Activity: updated activity 0f243a8a-2474-4a6c-b916-11d3a8c43859 - completed 94.4% - Scanning Music
Jan 23, 2021 22:27:42.848 [0x7fd104855700] DEBUG - Scanner: Processing directory /volume1/Plex/Library/Application Support/Plex Media Server/Plug-in Support/Caches/com.plexapp.agents.localmedia/HTTP.system/ea (parent: yes)
Jan 23, 2021 22:27:42.848 [0x7fd104855700] DEBUG - Skipping over directory 'Library/Application Support/Plex Media Server/Plug-in Support/Caches/com.plexapp.agents.localmedia/HTTP.system/ea', as nothing has changed; removing 0 media items from map.
Jan 23, 2021 22:27:42.848 [0x7fd104855700] DEBUG - Activity: updated activity 0f243a8a-2474-4a6c-b916-11d3a8c43859 - completed 94.4% - Scanning Music
- You placed media in the Plex share. — ignoring the warnings.
- You then incorrectly told PMS what to scan (probably
/volume1/Plex/Library? - You’ve created an infinite loop (which happens in every case)
The solution here.
- Stop Plex
- Uninstall the package
- Move your media out of the Plex share into new shared folders of your making.
- Delete the Plex share
- Reinstall the package.
Please read through this Guide on how to setup PMS on Synology.