Sonic analysis stuck on 6 albums forever + several issues on the log file

[ilbe58]

Hello,

After dedicating a lot of time on the forum and Reddit I cannot find any solution for my issue.

Situation: every day during the maintenance hours my Plex server is continuously performing sonic analysis on 6 albums and get stuck there.

My library is around 2k albums and 27k tracks

What I have tried so far:

• Reboot server application on the NAS
• Reboot NAS
• Deleted the codecs in /PlexMediaServer/AppData/Plex Media Server/Codecs and reboot again (suggested on a post in the forum)
• Not knowing what are the album causing the issue I tried to do the plex dance and remove the latest 60 albums I have added. Closed the app, refreshed the library and added back again. In this case another additional sonic analysis has started and proceeding correctly. As you can see there are two lines, the first one that is the one creating the issue and a second one that is proceeding as expected.
  
  

I have the dig into the log and I found a few errors that might be helpful to be reported here.

1. I have a lot of rows related to this attempt… all the same 3 lines repeating for several requests. I really don’t know what is all about as I don’t have any transoding activity pending

Mar 22, 2025 12:14:09.001 [140078241065784] ERROR - [Req#96c3/Transcode/4f6acbcb-6018-4f67-8c53-9e0d5251dfe8/2ddd535c-ace0-4097-82bf-336a512df493] Error while decoding stream #0:1: I/O error
Mar 22, 2025 12:14:14.000 [140078241065784] ERROR - [Req#96c4/Transcode/4f6acbcb-6018-4f67-8c53-9e0d5251dfe8/2ddd535c-ace0-4097-82bf-336a512df493] [eac3_eae @ 0x7f54b0ec5b40] EAE timeout! EAE not running, or wrong folder? Could not read ‘/var/packages/PlexMediaServer/shares/PlexMediaServer/AppData/tmp/pms-abfe1860-b878-4dfa-8a0a-c8024048d877/EasyAudioEncoder/Convert to WAV (to 8ch or less)/4f6acbcb-6018-4f67-8c53-9e0d5251dfe8_23888-0-60.wav’
Mar 22, 2025 12:14:14.001 [140078241065784] ERROR - [Req#96c5/Transcode/4f6acbcb-6018-4f67-8c53-9e0d5251dfe8/2ddd535c-ace0-4097-82bf-336a512df493] [eac3_eae @ 0x7f54b0ec5b40] error reading output: -5 (I/O error)

2. I have a warning related to codec not being available

Mar 22, 2025 12:09:08.576 [140078230391608] WARN - MDE: unable to find a working transcode profile for video stream

(no change since I deleted the codecs and reboot, still happens). How can I fix that?

3. I got these three error flags related to music analysis but I cannot link trackID to real track names/paths in any way. How can I do that?

Mar 22, 2025 12:04:02.932 [140078234557240] WARN - [MusicAnalysis] Analysis had wrong number of dimensions (1) for track 41784, skipping.
Mar 22, 2025 12:04:04.186 [140078234557240] WARN - [MusicAnalysis] Analysis had wrong number of dimensions (1) for track 37047, skipping.
Mar 22, 2025 12:04:04.991 [140078234557240] WARN - [MusicAnalysis] Analysis had wrong number of dimensions (1) for track 71832, skipping.

4. I got a ton of errors like this

Mar 22, 2025 12:03:59.485 [140078211197752] ERROR - [Req#6360] [Notify] Failed to add watch for “/volume1/Archivio/Video/****/*****” (28: No space left on device)

This error comes up for a very large number of directory/files but I have more than 7TB of free space. Moreover in several given directories it happens that some file is OK and for some other it says 28:No space left on the device. What can be the issue?

I would be open to uninstall and reinstall from scratch but I would like to avoid spending a lot of time in rebuilding my library of videos and music and be in the same place.

Is there a way to uninstall and reinstall while preserving metadata (credits/intros/etc.) and sonic analysis.

Thanks in advance to everyone that will be willing to help.

NAS Synology DS 423+
4x18TB HDD Toshiiba Enterprise
Additional SSD cache card
Server Version#:1.41.5.9522-72009522
Player Version#:4.145.1
<If providing server logs please do NOT turn on verbose logging, only debug logging should be enabled>

[therealninjaturtle]

I’m having the same issue; stable-train Docker image on Truenas Scale (1.41.7.9823-59f304c16). I can tell Plex isn’t actually doing anything because it’s sitting at 0% CPU usage. I also found instances of the “Analysis had wrong number of dimensions” message, although I don’t think Sonic Analysis is failing overall because in the logs I can see it building indexes on the library:

Jun 04, 2025 01:59:46.460 [140453325175608] DEBUG - [MusicAnalysis] Building track index with 17669 tracks.
Jun 04, 2025 01:59:46.460 [140453325175608] DEBUG - [MusicAnalysis] Activity: updated activity 163eb2e3-af10-436a-91fb-7d2b484b1074 - completed 40.0% - Sonic Analysis
Jun 04, 2025 01:59:46.476 [140453325175608] DEBUG - [MusicAnalysis] Building tree.
Jun 04, 2025 01:59:50.941 [140453325175608] DEBUG - [MusicAnalysis] Building album index with 1370 albums.
Jun 04, 2025 01:59:50.942 [140453325175608] DEBUG - [MusicAnalysis] Activity: updated activity 163eb2e3-af10-436a-91fb-7d2b484b1074 - completed 60.0% - Sonic Analysis
Jun 04, 2025 01:59:50.944 [140453325175608] DEBUG - [MusicAnalysis] Building tree.
Jun 04, 2025 01:59:51.256 [140453325175608] DEBUG - [MusicAnalysis] Building artist index with 430 artists.
Jun 04, 2025 01:59:51.256 [140453325175608] DEBUG - [MusicAnalysis] Activity: updated activity 163eb2e3-af10-436a-91fb-7d2b484b1074 - completed 80.0% - Sonic Analysis
Jun 04, 2025 01:59:51.258 [140453325175608] DEBUG - [MusicAnalysis] Building tree.
Jun 04, 2025 01:59:51.738 [140453325175608] DEBUG - [MusicAnalysis] Activity: Ended activity 163eb2e3-af10-436a-91fb-7d2b484b1074.
Jun 04, 2025 01:59:51.738 [140453325175608] DEBUG - [MusicAnalysis] Indexes completed.

This issue seems more like Plex thinking a task exists when it doesn’t.

[trumpy81]

@ilbe58

Mar 22, 2025 12:03:59.485 [140078211197752] ERROR - [Req#6360] [Notify] Failed to add watch for “/volume1/Archivio/Video/****/*****” (28: No space left on device)

This tells us that your iNotify table is full. You need to correct that by following this guide:

Synology FAQ - Questions, Answers, and How-To's

FAQ 16: Increase the number of folders Plex can monitor Applicable to all supported versions of DSM. When the Linux ‘inotify’ table fills up, this will cause when Plex to stop automatically detecting new media you add to the server. It will also manifest when there are transcoder problems with Dolby audio codecs. Linux has a default table size which is static. We can increase this at will. On some versions it’s 8192. On newer kernels, the default is 65536 folders. This is easy to incr…

After correcting the iNotify table issue, most of the other issues you noted should resolve themselves.

If you have persistent error messages (WARN - [MusicAnalysis] Analysis had wrong number of dimensions) for certain albums/tracks, then I would suggest that you re-encode/re-download those tracks (using different sources) as there appears to be some missing data from your current files.

[AmazingRando24]

I believe I am having the exact same issue on a QNAP. It caused a ton of seemingly unrelated problems that I could only solve by removing the music library. I am now attempting to add it all back with Sonic Analysis disabled, but would like to find a better solution. Everything ran fine with a fairly massive Music Library up till a few months ago.

Sonic Analysis Loop

Server Version#: 1.41.8.9834 Player Version#: N/A Server seems to be caught in a Sonic Analysis Loop for a few days. This is similar to a post someone had a few years back and it seems some manner of server patch was required? Logs attached. [image] Plex Media Server Logs_2025-05-30_13-26-24.zip (4.6 MB)