Download/network error

[josevazf]

Hey! First of all thanks for the effort assembling this :)
I have managed to get everything working: I can see my Spotify playlists on Traktor but when I try to load any song to a deck I just get the "Download/network error" on the respective deck and "File cannot be played: File may be missing, corrupt or unsupported" on the bottom status bar.
I also get this on the server, as an example:

366937 [eventLoopGroupProxy-4-12] INFO io.ktor.server.Application  - 500 Internal Server Error: GET - /v4/catalog/tracks/139902513733736437/download/ in 23ms
366938 [eventLoopGroupProxy-4-1] INFO io.ktor.server.Application  - 404 Not Found: GET - /v4/catalog/tracks/ in 0ms
366939 [eventLoopGroupProxy-3-7] DEBUG io.netty.handler.ssl.SslHandler  - [id: 0x99ddc3bc, L:/127.0.0.1:8443 - R:/127.0.0.1:60281] Swallowing a harmless 'con
nection reset by peer / broken pipe' error that occurred while writing close_notify in response to the peer's close_notify
java.net.SocketException: Connection reset
        at java.base/sun.nio.ch.SocketChannelImpl.throwConnectionReset(SocketChannelImpl.java:399)
        at java.base/sun.nio.ch.SocketChannelImpl.implRead(SocketChannelImpl.java:431)
        at java.base/sun.nio.ch.SocketChannelImpl.read(SocketChannelImpl.java:489)
        at io.netty.buffer.PooledByteBuf.setBytes(PooledByteBuf.java:255)
        at io.netty.buffer.AbstractByteBuf.writeBytes(AbstractByteBuf.java:1132)
        at io.netty.channel.socket.nio.NioSocketChannel.doReadBytes(NioSocketChannel.java:356)
        at io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:151)
        at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:796)
        at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:732)
        at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:658)
        at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:562)
        at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:998)
        at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
        at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
        at java.base/java.lang.Thread.run(Thread.java:1474)
373143 [session-scheduler-495222063] WARN xyz.gianlu.librespot.core.Session  - Socket timed out. Reconnecting...
373191 [session-scheduler-495222063] INFO xyz.gianlu.librespot.core.ApResolver  - Loaded aps into pool: {accesspoint=[ap-gew1.spotify.com:4070, ap-gew1.spoti
fy.com:443, ap-gew1.spotify.com:80, ap-guc3.spotify.com:4070, ap-gue1.spotify.com:443, ap-gew4.spotify.com:80], dealer=[gew1-dealer.spotify.com:443, guc3-dea
ler.spotify.com:443, gue1-dealer.spotify.com:443, gew4-dealer.spotify.com:443], spclient=[gew1-spclient.spotify.com:443, guc3-spclient.spotify.com:443, gue1-
spclient.spotify.com:443, gew4-spclient.spotify.com:443]}
373842 [session-scheduler-495222063] INFO xyz.gianlu.librespot.core.Session  - Connected successfully!
374127 [session-packet-receiver] INFO xyz.gianlu.librespot.core.Session  - Skipping SecretBlock
374127 [session-packet-receiver] INFO xyz.gianlu.librespot.core.Session  - Received LicenseVersion: 0
374127 [session-packet-receiver] INFO xyz.gianlu.librespot.core.Session  - Received CountryCode: PT
374127 [session-scheduler-495222063] INFO xyz.gianlu.librespot.core.Session  - Re-authenticated as 1070072!
374130 [session-packet-receiver] INFO xyz.gianlu.librespot.core.Session  - Skipping UnknownData_AllZeros
374131 [session-packet-receiver] INFO xyz.gianlu.librespot.core.Session  - Skipping LegacyWelcome
374236 [session-packet-receiver] DEBUG xyz.gianlu.librespot.mercury.MercuryClient  - Couldn't dispatch Mercury event {seq: -6371274054480953344, uri: hm://pu
sher/v1/connections/NjZiZGFlMDg2ZTYzMWY0NmIzM2I0MGUxZjVjZWJiMzhlMzgzYmU1NStBUCt0Y3A6Ly8wYWIxNDJiNS5pcC5ndWUxLnNwb3RpZnkubmV0OjUwMjUrNzYyODkwQ0RGRUUzRUU4QkZCM
UM3NjYxNDFEMjk0RDYxMkU1MzhBMTI1M0U3RDdFRUU5RkY1OTcyNDcyODQxNg%3D%3D, code: 200, payload: []}
374345 [session-packet-receiver] DEBUG xyz.gianlu.librespot.core.Session  - Received 0x10: DB5ABFDBB09D88C5CF70B688843A76196E15AF0B
374511 [session-packet-receiver] INFO xyz.gianlu.librespot.core.Session  - Skipping unknown command {cmd: 0x75, payload: 000001}

Do you have any idea what could be happening?

[josevazf]

Ok, managed to get it working!
Excluded protobuf-javalite from the dependencies.
What was happening:

• librespot-java (Spotify library) needs protobuf-java (full version)
• NewPipeExtractor (YouTube library) was pulling in protobuf-javalite (lite version)
• Both were on the classpath, but the lite version was being loaded first
• The lite version is missing AnyProto.getDescriptor() method that librespot needs

The change in build.gradle.kts:

configurations.all {
    // Exclude protobuf-javalite - it conflicts with protobuf-java needed by librespot
    exclude(group = "com.google.protobuf", module = "protobuf-javalite")
    resolutionStrategy {
        force("com.google.protobuf:protobuf-java:3.25.5")
    }
}

[0xf4b1]

oh yes, I had the same problem in a different project, glad to hear that spotify works for you with that change because I can not test as it stopped working with free accounts

[mat6603]

Environment:

• Traktor Pro 4.4.122
• macOS Tahoe 26.1 (Apple Silicon)
• traktor-streaming-proxy v0.5.2
• Spotify Premium (Family)

Problem:
Spotify streaming fails with "500 Internal Server Error" caused by API rate limit (429).

Log:
SpotifyApi$HttpException: {
"error": {
"status": 429,
"message": "API rate limit exceeded"
}
}
Workaround blocked:
Creating a new Spotify Developer App to get fresh credentials is currently not possible. Spotify shows:

"Note: New integrations are currently on hold while we make updates to improve reliability and performance."

Status:

• Spotify authentication succeeds
• Spotify track listing fails with 429

Is there any other workaround for the rate limit issue, or do we have to wait until Spotify allows new app registrations again?

[juliencousineau]

Same error here after rebuilding with the change inbuild.gradle.kts

GET - /v4/catalog/genres/1/tracks/. Exception class io.github.tiefensuche.spotify.api.SpotifyApi$HttpException: { "error": { "status": 429, "message": "API rate limit exceeded" } } io.github.tiefensuche.spotify.api.SpotifyApi$HttpException: { "error": { "status": 429, "message": "API rate limit exceeded" } }

[mat6603]

Update:
Other users report the same 429 error, even after rebuilding the project. This suggests the built-in Spotify client ID used by the proxy is rate-limited by Spotify.

Since Spotify currently blocks new Developer App registrations, there seems to be no workaround available at this time.

[0xf4b1]

I see this error also in another project that uses librespot-java to play music from Spotify. This issue must most likely be fixed in the librespot-java library itself as there is no need to specify a client ID in this project and I believe also no way to change it from projects that use the library.