Sync crashes app at last steps

Support
1

Issue description:

I noticed that for 3 days now the lms provider in Symfonium no longer lists syncs as successful (however it also does not specify that they failed). To clarify: It lists the last sync from 19/07/2025 as successful but makes no mention of the syncs that have happened since.
Strangely, the tracks I added do show up in Symfonium which is why I did not notice it until yesterday.

I watched the last sync happen. After all Artists, Albums and Tracks were counted, the sync did not progress to the “collecting metadata” stage. I started debug logging after it hung for a few seconds. Then the app crashed/closed itself. I restarted it and stopped debug logging.

I suspected that there’s something wrong with my db in Symfonium, so I ran: “Cleanup internal state”.
However this also closed/crashed the app after a few seconds. I enabled debug logging, started “Cleanup internal state”, let Symfonium crash, restarted the app and stopped the logging.

Logs:

Upload description: 655321 sync crash & 655321 cleanup internal state crash

Additional information:

 
I’m currently on a test lms container because I helped @itm to improve the scan speed of lms:
epoupon/lms:6704762c

But I doubt that’s the reason since “Cleanup internal state” also crashes Symfonium.
 

Reproduction steps:

 
Sync crash:

  1. Start a sync to lms
  2. Wait till the artists, albums and tracks are counted
  3. Wait till Symfonium crashes

Cleanup internal state crash:

  1. Start cleanup internal state
  2. Wait till Symfonium crashes
     

Media provider:

Subsonic

Screenshots:

     

2

Check that you have enough space free on the device where the database is present.

Your phone can’t compact the DB and crash.

3

Is that a special path on the device? My phone seems to have ample free storage.

free storage
free storage1264×773 63.2 KB

4

Then remove the provider. Do the cleanup and see if it works ?

5

No idea what was wrong but after removing the provider, re-adding it and waiting 6 hours for the initial sync to finish it works again. How odd.

6

With LMS there’s no difference in syncs between the first and the others, so it should not have taken 6 hours. There’s something strange here.

Does the cleanup state works ?

7

That has always been the case for me with “Fetch additional metadata” enabled for the provider. First sync takes forever at the “gathering metadata” stage (5-6ish hours) and consecutive syncs take 20-30min.

It doesn’t crash the app, so I guess? I don’t think it reports finishing the task, does it?