Running daemon with Version 2.0 ends in NullPointerException

[erikp152]

I have tested the refactored Version 2.0 on my RPI. But if i am starting the daemon, it ends in NullpointerExceptions every ms.

28 Apr. 2020 11:59:26,378 - ERROR:rocks.voss.musicsync.Application:main:47: Exception
java.lang.NullPointerException
	at rocks.voss.musicsync.Application.sync(Application.java:61)
	at rocks.voss.musicsync.Application.main(Application.java:42)

Does somebody else have this problem as well? @maximilianvoss any idea?

[maximilianvoss]

How have you started the musicsync? It seems like it did not detect any fitting input plugin.
Please check following file: https://github.com/maximilianvoss/spotify-toniebox-sync/blob/v2.0/package/src/main/resources/musicsync
It puts all generated jars into a classpath to run musicsync. Haven't had time yet to build a single jar with all dependencies included

[paschmal]

I've got the same problem. Running musicsync script from package\target\output doesn't load any plugins:

Usage: spotify-toniebox-sync.jar [--daemon | --input INPUT --output OUTPUT]
--daemon
                Run in daemon mode to sync periodically all lists in the properties file
--input INPUT
                Define an input source for a one-time run
--output OUTPUT
                Define an output destination for a one-time run

Input Plugins:

Output Plugins:

I also tried to debug PluginLoader.java but it cannot find any subTypes in method loadPlugins(...). My environment is Ubuntu 20.04 LTS with openjdk-11. Do you have any idea why it's not working?

[maximilianvoss]

Hi @paschmal,
how do you launch the application? It seems that the plugins are not loaded/in your classpath.
Max

[matthiaslau]

I´ve experienced the same problem that no plugins were loaded. I started the application via the script: ./musicsync --input spotify:playlist:... --output toniebox:...

[paschmal]

I run the same command as @matthiaslau using musicsync script. I also tried to run it directly from vscode with explicit classpath set to the plugin jar files in launch.json, but that's not working either.

[bergerf]

Is there an solution for this? I have the same issue...

[maximilianvoss]

What JDK version do you use? It seems to be an issue with reflections

[bergerf]

[~/src/music-sync/package/target/output]$ java -cp musicsync-application-2.0-SNAPSHOT.jar:musicsync-plugins-input-spotify-2.0-SNAPSHOT.jar:musicsync-plugins-output-filesystem-2.0-SNAPSHOT.jar:musicsync-plugins-output-toniebox-2.0-SNAPSHOT.jar:musicsync-plugins-output-toniebox-2.0-SNAPSHOT.jar rocks.voss.musicsync.Application --input "spotify:playlist:ZZZ" --output "toniebox:XXX:YYY"
Exception in thread "main" java.lang.NullPointerException
at rocks.voss.musicsync.Application.sync(Application.java:61)
at rocks.voss.musicsync.Application.main(Application.java:52)

[~/src/music-sync/package/target/output]$ java -version
openjdk version "11.0.8" 2020-07-14
OpenJDK Runtime Environment (build 11.0.8+10-post-Ubuntu-0ubuntu118.04.1)
OpenJDK 64-Bit Server VM (build 11.0.8+10-post-Ubuntu-0ubuntu118.04.1, mixed mode, sharing)

Its an Ubuntu 18.04 derivative.

[maximilianvoss]

Thanks for confirmation. It seems to be a Java 9+ issue as the module management with Jigsaw has changed which prevents easy reflection. I will have a look to get this resolved.

[moritzj29]

Hi everyone, I tried to set up this project this weekend and ran into this same issue. Thanks for the note, that this is related to the java version. I downgraded to version 8 for testing (https://askubuntu.com/questions/1133216/downgrading-java-11-to-java-8) and got rid of this.

Unfortunately, I'm not able to log into the Toniecloud:

> 13 Sep 2020 12:44:20,901 - ERROR:rocks.voss.musicsync.plugins.output.toniebox.TonieboxOutputPlugin:openConnection:175: IOException while login
com.fasterxml.jackson.databind.exc.UnrecognizedPropertyException: Unrecognized field "errors" (class rocks.voss.toniebox.beans.toniebox.JWTToken), not marked as ignorable (one known property: "jwt"])
at [Source: N/A; line: -1, column: -1] (through reference chain: rocks.voss.toniebox.beans.toniebox.JWTToken["errors"])
at com.fasterxml.jackson.databind.exc.UnrecognizedPropertyException.from(UnrecognizedPropertyException.java:79)
at com.fasterxml.jackson.databind.DeserializationContext.reportUnknownProperty(DeserializationContext.java:555)
at com.fasterxml.jackson.databind.deser.std.StdDeserializer.handleUnknownProperty(StdDeserializer.java:708)
at com.fasterxml.jackson.databind.deser.BeanDeserializerBase.handleUnknownProperty(BeanDeserializerBase.java:1160)
at com.fasterxml.jackson.databind.deser.BeanDeserializer.deserializeFromObject(BeanDeserializer.java:315)
at com.fasterxml.jackson.databind.deser.BeanDeserializer.deserialize(BeanDeserializer.java:121)
at com.fasterxml.jackson.databind.ObjectMapper._readValue(ObjectMapper.java:2860)
at com.fasterxml.jackson.databind.ObjectMapper.readValue(ObjectMapper.java:1569)
at com.fasterxml.jackson.databind.ObjectMapper.treeToValue(ObjectMapper.java:1902)
at rocks.voss.toniebox.beans.Transformer.createBean(Transformer.java:23)
at rocks.voss.toniebox.beans.Transformer.createBean(Transformer.java:16)
at rocks.voss.toniebox.RequestHandler.executeRequest(RequestHandler.java:159)
at rocks.voss.toniebox.RequestHandler.executePostRequest(RequestHandler.java:125)
at rocks.voss.toniebox.RequestHandler.Login(RequestHandler.java:48)
at rocks.voss.toniebox.TonieHandler.login(TonieHandler.java:43)
at rocks.voss.musicsync.plugins.output.toniebox.TonieboxOutputPlugin.openConnection(TonieboxOutputPlugin.java:172)
at rocks.voss.musicsync.plugins.output.toniebox.TonieboxOutputPlugin.establishConnection(TonieboxOutputPlugin.java:126)
at rocks.voss.musicsync.Application.sync(Application.java:62)
at rocks.voss.musicsync.Application.main(Application.java:42)
13 Sep 2020 12:44:21,188 - INFO:rocks.voss.musicsync.plugins.input.spotify.SpotifyRecordingHandler:isFileValid:95: File doesn't exists
13 Sep 2020 12:44:21,188 - INFO:rocks.voss.musicsync.plugins.input.spotify.SpotifyRecordingHandler:downloadFile:37: Downloading: spotify:track:0yD2V18wbhNdFlE4rg3ovd

Spotify seems to work, at least it says that it tries to download. I double checked my toniebox login credentials. But the unknown field "error" suggest that something is wrong. Any ideas whats causing this? I get the same error with v1.3 and v2.0...
EDIT: moving this to a separate issue at toniebox-API

[maximilianvoss]

Code was merged and it should work now on JDK8