navidrome/core
Deluan Quintão 27f0210392
fix(scrobbler): tolerate out-of-order playback reports (#5793)
* fix(scrobbler): tolerate out-of-order playback reports

Clients may fire reportPlayback requests concurrently (Feishin sends
'starting' and 'playing' in parallel, and the previous track's 'stopped'
races the next track's start), so reports can be processed out of order.
Two cases corrupted the now-playing session: a late 'starting' for the
track already playing downgraded the session state, freezing position
estimation at 0:00 until the next report; and a late 'stopped' for the
previous track removed the new track's session and dispatched a playback
report mislabeled with the new track's metadata, causing presence-style
plugins (e.g. Discord Rich Presence) to clear or show stale state.

ReportPlayback now ignores a 'starting' report when the session already
has the same track in playing state, and ignores a 'stopped' report for
a track other than the current session's - skipping both the session
removal and the plugin dispatch, while still counting the play and
dispatching external scrobbles for the stopped track.

Reported in https://github.com/jeffvli/feishin/issues/2131

* fix(scrobbler): serialize session writes to close starting/playing race

The out-of-order 'starting' guard checked the session cache before the
media-file load, leaving a window where a concurrent 'playing' report on a
fresh session could write between the check and the write, and still be
overwritten back to 'starting'. Session check-then-write sections are now
serialized by a mutex, with the guard re-checked after the load. Also
tightens the guard comment to say 'playing session', matching the condition.

Found by Codex review on #5793.

* fix(scrobbler): fully exit ReportPlayback when ignoring out-of-order reports

The out-of-order guards used 'break', which only exits the switch, so the
post-switch NowPlaying block still ran for an ignored 'starting' report and
enqueued a NowPlaying dispatch with the stale report's position - potentially
overwriting a pending correct-position entry, since the queue is keyed by
client. Return nil instead, so ignored reports have no side effects.

Found by Gemini review on #5793.
2026-07-16 20:47:47 -04:00
..
agents feat(listenbrainz): match collaboration top-songs via all credited artist MBIDs (#5670) 2026-06-26 17:06:14 -04:00
artwork perf(artwork): faster image resize + update gen2brain/webp to v0.6.0 (#5652) 2026-06-22 16:33:01 -04:00
auth refactor: more warnings clean up 2026-05-20 17:43:12 -03:00
external feat(listenbrainz): match collaboration top-songs via all credited artist MBIDs (#5670) 2026-06-26 17:06:14 -04:00
ffmpeg fix(transcoding): preserve source metadata when transcoding downloads (#5628) 2026-06-18 09:58:43 -04:00
lyrics fix(scanner): stop logging expected lyrics sniff misses as warnings (#5702) 2026-07-02 09:46:57 -04:00
matcher feat(listenbrainz): match collaboration top-songs via all credited artist MBIDs (#5670) 2026-06-26 17:06:14 -04:00
metrics perf(db): keep query planner statistics trustworthy with full ANALYZE (#5740) 2026-07-13 12:04:29 -04:00
playback refactor: more warnings clean up 2026-05-20 17:43:12 -03:00
playlists fix(jellyfin): close the unbounded playlist and search paths left by #5783 (#5784) 2026-07-15 18:09:59 -04:00
publicurl fix(shares): honor path component of ShareURL config 2026-04-05 12:12:15 -04:00
scrobbler fix(scrobbler): tolerate out-of-order playback reports (#5793) 2026-07-16 20:47:47 -04:00
sonic feat(jellyfin): AudioMuse-AI compatible sonic endpoints (#5782) 2026-07-15 20:44:56 -04:00
storage fix(scanner): resolve file symlinks with the production local storage FS (#5755) 2026-07-10 10:52:05 -04:00
stream fix(subsonic): omit bit depth for lossy targets in transcode decision (#5768) 2026-07-12 13:27:01 -04:00
archiver.go fix(transcoding): cap concurrent transcodes to prevent ffmpeg DoS (#5522) 2026-05-24 00:24:30 -03:00
archiver_test.go fix(transcoding): cap concurrent transcodes to prevent ffmpeg DoS (#5522) 2026-05-24 00:24:30 -03:00
common.go feat(bfr): Big Refactor: new scanner, lots of new fields and tags, improvements and DB schema changes (#2709) 2025-02-19 20:35:17 -05:00
common_test.go ci: run Go tests on Windows (#5380) 2026-04-19 13:16:47 -04:00
core_suite_test.go Rename log.LevelCritical to log.LevelFatal 2022-12-21 14:53:36 -05:00
image_upload.go feat(jellyfin): experimental Jellyfin Music API support (#5730) 2026-07-14 11:46:37 -04:00
image_upload_test.go feat(jellyfin): experimental Jellyfin Music API support (#5730) 2026-07-14 11:46:37 -04:00
inspect.go refactor: multiple syntax updates for Go 1.26 2026-05-19 18:02:36 -03:00
library.go perf(subsonic): speed up artist search3 deep-offset pagination (#5620) 2026-06-16 21:47:15 -04:00
library_test.go feat: add go-taglib pure Go metadata extractor (#4902) 2026-01-18 14:42:53 -05:00
maintenance.go refactor: run Go modernize (#5002) 2026-02-08 09:57:30 -05:00
maintenance_test.go feat(scanner): implement selective folder scanning and file system watcher improvements (#4674) 2025-11-14 22:15:43 -05:00
players.go feat(server): group Subsonic config options together 2025-03-05 12:29:30 -08:00
players_test.go Use userId in player, other fixes (#3182) 2024-08-03 13:37:21 -04:00
share.go chore: go fix 2026-05-28 22:13:05 -03:00
share_test.go refactor: extract TruncateRunes function for safe string truncation with suffix 2025-11-06 14:27:38 -05:00
user.go refactor: run Go modernize (#5002) 2026-02-08 09:57:30 -05:00
user_test.go feat(plugins): New Plugin System with multi-language PDK support (#4833) 2026-01-14 19:22:48 -05:00
wire_providers.go refactor: extract song-to-library matcher to core/matcher package (#5348) 2026-04-12 16:47:22 -04:00