bug: ListenBrainz source has constant socket & connection errors

[macstainless]

Please check existing knowledge before opening an issue

• I have checked the FAQ and documentation
• I have searched through existing issues and discussions.

Describe the Bug

I am running into TLS connection and polling errors daily with multi-scrobbler and ListenBrainz as a source. The logs are below and it seems this causes polling to permanently stop unless I manually restart polling. It's intermittent because some connections to LB work sometimes too. Relevant logs are below and I've made no changes to my ListenBrainz config for at least six months. Hope this is something simple. Thank you.

What configuration types are you using for multi-scrobbler? Check all that apply.

• Environmental Variables (ENV)
• Individual Config Files
• All-In-One Config File

Platform

Docker

Versions

multi-scrobbler 0.11.1 in Docker

Logs

[2026-01-29 09:59:31.847 -0500] DEBUG  : [App] [Sources] [Listenbrainz - ListenBrainz Source] Last activity was at 09:59:31-05:00 | Next check in 15.00s | No new tracks discovered
[2026-01-29 09:59:31.844 -0500] ERROR  : [App] [Sources] [Listenbrainz - ListenBrainz Source] [API - ListenBrainz - ListenBrainz Source] Error encountered while getting User listens | Error =>  Client network socket disconnected before secure TLS connection was established
[2026-01-29 09:59:18.982 -0500] DEBUG  : [App] [Sources] [Listenbrainz - ListenBrainz Source] Last activity was at 09:59:15-05:00 (00:03 ago) | Next check in 15.00s | No new tracks discovered
[2026-01-29 09:59:18.957 -0500] DEBUG  : [App] [Sources] [Plex - Plex (Source)] Last activity was at 2026-01-28T03:06:23-05:00 (06:52:55 ago) | Next check in (5 + 25) | No new tracks discovered
[2026-01-29 09:59:15.062 -0500] DEBUG  : [App] [Sources] [Listenbrainz - ListenBrainz Source] [Player music.apple.com-SmashTunes-5.9-SingleUser] Started new Player listen range.
[2026-01-29 09:59:14.595 -0500] INFO   : [App] [Sources] [Listenbrainz - ListenBrainz Source] Polling started
[2026-01-29 09:59:04.085 -0500] DEBUG  : [App] [Sources] [Listenbrainz - ListenBrainz Source] [Player music.apple.com-SmashTunes-5.9-SingleUser] Generating play object with playDateCompleted
[2026-01-29 09:59:04.084 -0500] DEBUG  : [App] [Sources] [Listenbrainz - ListenBrainz Source] [Player music.apple.com-SmashTunes-5.9-SingleUser] Ended current Player listen range.
[2026-01-29 09:59:04.083 -0500] DEBUG  : [App] [Sources] [Listenbrainz - ListenBrainz Source] [Player music.apple.com-SmashTunes-5.9-SingleUser] Stale after no Play updates for 00:19 (staleAfter 15s)
[2026-01-29 09:58:59.521 -0500] INFO   : [App] [Sources] [Listenbrainz - ListenBrainz Source] Poll retries (2) less than max poll retries (5), restarting polling after 15 second delay...
[2026-01-29 09:58:59.517 -0500] ERROR  : [App] [Sources] [Listenbrainz - ListenBrainz Source] Error occurred while polling
Error: Error occurred while polling
    at ListenbrainzSource.doPolling (CWD/src/backend/sources/AbstractSource.ts:536:31)
    at process.processTicksAndRejections (node:internal/process/task_queues:95:5)
    at async ListenbrainzSource.startPolling (CWD/src/backend/sources/AbstractSource.ts:385:27)
    at async ListenbrainzSource.poll (CWD/src/backend/sources/AbstractSource.ts:353:9)
caused by: Error: Error occurred while refreshing recently played
    at ListenbrainzSource.doPolling (CWD/src/backend/sources/AbstractSource.ts:454:27)
    at process.processTicksAndRejections (node:internal/process/task_queues:95:5)
    at async ListenbrainzSource.startPolling (CWD/src/backend/sources/AbstractSource.ts:385:27)
    at async ListenbrainzSource.poll (CWD/src/backend/sources/AbstractSource.ts:353:9)
caused by: Error: Client network socket disconnected before secure TLS connection was established
    at TLSSocket.onConnectEnd (node:_tls_wrap:1730:19)
    at TLSSocket.emit (node:events:530:35)
    at endReadableNT (node:internal/streams/readable:1698:12)
    at process.processTicksAndRejections (node:internal/process/task_queues:82:21)

Additional Context

No response

[FoxxMD]

some connections to LB work sometimes too.

Is this some other connections in MS? Or other programs that use listenbrainz?

caused by: Error: Client network socket disconnected before secure TLS connection was established

There's not much I can do about this specific error. This is a network issue between MS and listenbrainz. I have connection issues from my instance sometimes as well, but MS usually resolves them eventually.

it seems this causes polling to permanently stop unless I manually restart polling.
Poll retries (2) less than max poll retries (5), restarting polling after 15 second delay...

I see that MS is trying to restart polling but I assume it's failing after 5 retries? It should also be trying to restart the listenbrainz Source every 20 minutes, if it's not already started. Is it not doing this at all? Are there any associated logs that shows errors for this? Look for Heartbeat in your logs.

[4rft5]

I've seemingly been having LB connection/sending issues also, not sure if this is entirely related to OP's issue (apologies if it isn't) but I do have some logs:

[2026-01-31 00:21:47.803 -0700] ERROR  : [App] [Scrobblers] [Listenbrainz - ListenBrainz] Scrobble processing interrupted
[2026-01-31 00:21:47.786 -0700] DEBUG  : [App] [Scrobblers] [Listenbrainz - ListenBrainz] Found 40 recent scrobbles
[2026-01-31 00:21:46.188 -0700] VERBOSE: [App] [Heartbeat] [Sources] Checked 1 sources for start signals.
[2026-01-31 00:21:46.187 -0700] VERBOSE: [App] [Heartbeat] [Sources] Starting check...
[2026-01-31 00:21:46.187 -0700] VERBOSE: [App] [Heartbeat] [Clients] Checked Dead letter queue for 3 clients.
[2026-01-31 00:21:46.185 -0700] DEBUG  : [App] [Scrobblers] [Listenbrainz - ListenBrainz] Refreshing recent scrobbles
[2026-01-31 00:21:46.184 -0700] DEBUG  : [App] [Scrobblers] [Listenbrainz - ListenBrainz] [Upstream Refresh] Should refresh => last refresh (1074s ago) was longer than refreshStaleAfter (60s)
[2026-01-31 00:21:46.184 -0700] INFO   : [App] [Scrobblers] [Listenbrainz - ListenBrainz] Scrobble processing started
[2026-01-31 00:21:46.183 -0700] INFO   : [App] [Scrobblers] [Listenbrainz - ListenBrainz] Should be processing scrobbles! Attempting to restart scrobbling...
    label: "Heartbeat"
[2026-01-31 00:21:46.182 -0700] VERBOSE: [App] [Heartbeat] [Clients] Starting check...
[2026-01-31 00:03:51.933 -0700] WARN   : [App] [Scrobblers] [Listenbrainz - ListenBrainz] Scrobble processing retries (5) equal to max processing retries (5), stopping processing!
[2026-01-31 00:03:51.932 -0700] ERROR  : [App] [Scrobblers] [Listenbrainz - ListenBrainz] Cannot set properties of undefined (setting 'scrobble')
TypeError: Cannot set properties of undefined (setting 'scrobble')
    at ListenbrainzScrobbler.doProcessing (CWD/src/backend/scrobblers/AbstractScrobbleClient.ts:809:60)
    at process.processTicksAndRejections (node:internal/process/task_queues:95:5)
    at async ListenbrainzScrobbler.startScrobbling (CWD/src/backend/scrobblers/AbstractScrobbleClient.ts:735:27)

I'm on the latest release 0.11.2. As of right now, no scrobbles are sent regardless of if I try and force, or just start (currently at Idle). Prior to this issue I had one where it'd backlog hundreds of LB scrobbles (LFM/Maloja worked great) and would need to be constantly started manually to cycle them through and then it'd work on its own, but now none go through at all.

[FoxxMD]

@4rft5 can you try foxxmd/multi-scrobbler:edge? I think the issue is you have scrobbles cached from before the update that don't have some new data structures.

[4rft5]

@4rft5 can you try foxxmd/multi-scrobbler:edge? I think the issue is you have scrobbles cached from before the update that don't have some new data structures.

That very well could have been the case, I'm not sure what changed but at some point overnight something happened and LB seems to have fixed itself lol. Will update if I see the issue again, though.