Why are my playlists suddenly empty?

[jborris]

Problem Description: Most of my playlists are suddenly empty?
Troubleshooting Steps: I have restarted subsonic, rebooted computer, verified USB drives are connected and functioning, upgraded to 4.8, rescanned drives.
Playback Application and version: Firefox 20.0.1
Subsonic Version: 4.8 (build 3434) – April 17, 2013
Server Version: jetty-6.1.x, java 1.7.0_17, Windows 7 (64.3 MB / 219.9 MB)
Hardware Platform: Windows 7
Java Memory Limit: 512MB
Problem Filename: NA
Output from ffmpeg -i: NA
Last ten log file lines:

[4/18/13 3:04:19 AM EDT] INFO MediaScannerService Scanned media library with 95500 entries.
[4/18/13 3:04:20 AM EDT] INFO MediaScannerService Scanned media library with 95750 entries.
[4/18/13 3:04:20 AM EDT] INFO MediaScannerService Scanned media library with 96000 entries.
[4/18/13 3:04:21 AM EDT] INFO MediaScannerService Scanned media library with 96250 entries.
[4/18/13 3:04:21 AM EDT] INFO MediaScannerService Scanned media library with 96500 entries.
[4/18/13 3:04:22 AM EDT] INFO MediaScannerService Scanned media library with 96750 entries.
[4/18/13 3:04:22 AM EDT] INFO MediaScannerService Scanned media library with 97000 entries.
[4/18/13 3:04:23 AM EDT] INFO MediaScannerService Scanned media library with 97250 entries.
[4/18/13 3:04:23 AM EDT] INFO MediaScannerService Scanned media library with 97500 entries.
[4/18/13 3:04:23 AM EDT] INFO MediaScannerService Scanned media library with 97750 entries.
[4/18/13 3:04:25 AM EDT] INFO MediaScannerService Scanned media library with 98000 entries.
[4/18/13 3:04:25 AM EDT] INFO MediaScannerService Scanned media library with 98250 entries.
[4/18/13 3:04:26 AM EDT] INFO MediaScannerService Scanned media library with 98500 entries.
[4/18/13 3:04:26 AM EDT] INFO MediaScannerService Scanned media library with 98750 entries.
[4/18/13 3:04:27 AM EDT] INFO MediaScannerService Scanned media library with 99000 entries.
[4/18/13 3:04:27 AM EDT] INFO MediaScannerService Scanned media library with 99250 entries.
[4/18/13 3:04:28 AM EDT] INFO MediaScannerService Scanned media library with 99500 entries.
[4/18/13 3:04:28 AM EDT] INFO MediaScannerService Scanned media library with 99750 entries.
[4/18/13 3:04:28 AM EDT] INFO MediaScannerService Scanned media library with 100000 entries.
[4/18/13 3:04:29 AM EDT] INFO MediaScannerService Scanned media library with 100250 entries.
[4/18/13 3:04:29 AM EDT] INFO MediaScannerService Scanned media library with 100500 entries.
[4/18/13 3:04:30 AM EDT] INFO MediaScannerService Scanned media library with 100750 entries.
[4/18/13 3:04:31 AM EDT] INFO MediaScannerService Scanned media library with 101000 entries.
[4/18/13 3:04:32 AM EDT] INFO MediaScannerService Scanned media library with 101250 entries.
[4/18/13 3:04:33 AM EDT] INFO MediaScannerService Scanned media library with 101500 entries.
[4/18/13 3:04:33 AM EDT] INFO MediaScannerService Scanned media library with 101750 entries.
[4/18/13 3:04:34 AM EDT] INFO MediaScannerService Scanned media library with 102000 entries.
[4/18/13 3:04:35 AM EDT] INFO MediaScannerService Scanned media library with 102250 entries.
[4/18/13 3:04:35 AM EDT] INFO MediaScannerService Scanned media library with 102500 entries.
[4/18/13 3:04:36 AM EDT] INFO MediaScannerService Scanned media library with 102750 entries.
[4/18/13 3:04:36 AM EDT] INFO MediaScannerService Scanned media library with 103000 entries.
[4/18/13 3:04:37 AM EDT] INFO MediaScannerService Scanned media library with 103250 entries.
[4/18/13 3:04:38 AM EDT] INFO MediaScannerService Scanned media library with 103491 entries.
[4/18/13 3:04:38 AM EDT] INFO MediaScannerService Marking non-present files.
[4/18/13 3:04:42 AM EDT] INFO MediaScannerService Marking non-present artists.
[4/18/13 3:04:42 AM EDT] INFO MediaScannerService Marking non-present albums.
[4/18/13 3:04:42 AM EDT] INFO MediaScannerService Completed media library scan.
[4/18/13 3:04:43 AM EDT] INFO PlaylistService Starting playlist import.
[4/18/13 3:04:44 AM EDT] INFO PlaylistService Completed playlist import.
[4/18/13 3:04:44 AM EDT] INFO PlaylistService Starting playlist statistics update.
[4/18/13 3:05:08 AM EDT] INFO PlaylistService Completed playlist statistics update.
[4/18/13 3:39:54 AM EDT] INFO NetworkService Successfully forwarding port 81.

[jborris]

I have found one post that talked about playlists being affected by automatic scans that occurred after an external drive was removed or disconnected. It seems to me that may remove song from subsonic database and therefore not available to play, however that should not affect a playlist. The Playlist should load and skip any tracks not found. My playlists are empty.

[daneren2005]

The playlists songs are associated ids. When you remove the drive and reattach it the scanner finds a "new" song with a different id, so the playlist is empty.

[jborris]

Awww man! Okay Thanks for that. I guess that is a good reason to disable automatic nightly scans. So I guess there is no way to recover huh. Do you think a Windows Restore might resolve, returning system to a state before the playlist was lost?