Lots of failing songs - "Error from channel for data receiver"

[Malvineous]

Is anyone else experiencing a lot of problems playing files within the last couple of days? I am getting a lot of errors like this:

ERROR librespot_core::channel] channel error: 2 0
WARN  librespot_audio::fetch] Error from channel for data receiver for range 3677412 (+16384).
ERROR librespot_core::channel] channel error: 2 0
WARN  librespot_audio::fetch] Error from channel for data receiver for range 3794352 (+16384).
ERROR librespot_core::channel] channel error: 2 0
WARN  librespot_audio::fetch] Error from channel for data receiver for range 3827120 (+16384).
ERROR librespot_core::channel] channel error: 2 0
WARN  librespot_audio::fetch] Error from channel for data receiver for range 3876272 (+16384).
ERROR librespot_core::channel] channel error: 2 0
WARN  librespot_audio::fetch] Error from channel for data receiver for range 3843504 (+16384).

Sometimes it keeps going and the song plays fine, sometimes it just skips that track, other times it just stops playback completely and I have to find where it's up to and press play on the following track.

Is it just me or is anyone else seeing this as well?

It only seems to affect certain songs, as many of them play fine, but you get one or two that won't play no matter what you do, with the above errors coming up all the time.

[Malvineous]

Seems to be very random - here's a playlist of songs I haven't been able to play in the last day: https://open.spotify.com/playlist/22NyzfaVl8fxWY1c97IlUP

I contacted Spotify support who gave me some test credentials and I see the same issue on the same songs with the test creds.

[devgianlu]

Seems to be very random - here's a playlist of songs I haven't been able to play in the last day: https://open.spotify.com/playlist/22NyzfaVl8fxWY1c97IlUP

They all play fine on librespot-java.

[Malvineous]

How strange. Are you playing the songs all the way through? They will usually start ok but the data stops coming in at some point in the middle of the song. They all play fine right through in the web player though.

I'm also getting other errors if I try to re-play the broken tracks, these come up at the start of the song and prevent any playback at all:

ERROR librespot_core::channel] channel error: 2 0
ERROR librespot_playback::player] Unable to load encrypted file.

However retrying a few times eventually allows playback to start, but it still usually gets cut off at some point in the middle.

[devgianlu]

librespot-java doesn't use channels anymore to retrieve tracks, therefore the issue cannot appear. Maybe Spotify is slowly dismissing this API.

[andrewfedun]

wanted to add that I've been facing the same issue as @Malvineous on most songs throughout the past few days. Is switching over the librespot-java the best fix?

[inickt]

I gave librespot-java a test and while it works I found it to be way slower/buggier for picking songs/skipping/shuffle/etc. I am experiencing both this and #510 which is a bummer. Please let me know if there are any other debugging steps I can help with!

[devgianlu]

I gave librespot-java a test and while it works I found it to be way slower/buggier for picking songs/skipping/shuffle/etc.

Yeah, the new protocol is much more complex and requires a lot of dumping to get it right. The JVM doesn't help either on lower end systems where resources are limited and everything is slowed down. I've just planned a rewrite of some of its parts (for that matters): librespot-org/librespot-java#249

Please let me know if there are any other debugging steps I can help with!

I don't think there's anything more to debug. The channel system exists since librespot was born and it's getting old as I've started implementing CDN on 16/03/2019 and it probably was there even before. My thought is that they are slowly shutting it down.

The CDN loading system is quite simple and it'll take someone who knows Rust no more that 3 days. Sadly, I don't know it, but I can help anybody who wants to implement it.

[andrewfedun]

@inickt I know this is a really dumb question but I was hoping you could help me - what was your installation process for librespot-java? I was struggling to find instructions on the librespot-java page. Thanks!

[devgianlu]

@andrewfedun Have a look here.

[andrewfedun]

@devgianlu Thanks that's super helpful! And thanks for building librespot in general, it's a really great project

[pentlander]

I gave librespot-java a test and while it works I found it to be way slower/buggier for picking songs/skipping/shuffle/etc.

Yeah, the new protocol is much more complex and requires a lot of dumping to get it right. The JVM doesn't help either on lower end systems where resources are limited and everything is slowed down. I've just planned a rewrite of some of its parts (for that matters): librespot-org/librespot-java#249

Please let me know if there are any other debugging steps I can help with!

I don't think there's anything more to debug. The channel system exists since librespot was born and it's getting old as I've started implementing CDN on 16/03/2019 and it probably was there even before. My thought is that they are slowly shutting it down.

The CDN loading system is quite simple and it'll take someone who knows Rust no more that 3 days. Sadly, I don't know it, but I can help anybody who wants to implement it.

Could you point to the code in librespot-java that handles this new protocol? I might be interested in taking a look.