Cannot invoke "com.xxmicloxx.NoteBlockAPI.NoteBlockAPI.doAsync(java.lang.Runnable)" because "this.plugin" is null

[charlie-moomoo]

Full error:

[21:04:12 ERROR]: [ModernPluginLoadingStrategy] Could not load plugin 'MooSussyPlayMusicInCowSaysGamePluginByCowGL-1.0.jar' in folder 'plugins'
org.bukkit.plugin.InvalidPluginException: java.lang.NullPointerException: Cannot invoke "com.xxmicloxx.NoteBlockAPI.NoteBlockAPI.doAsync(java.lang.Runnable)" because "this.plugin" is null
	at io.papermc.paper.plugin.provider.type.spigot.SpigotPluginProvider.createInstance(SpigotPluginProvider.java:127) ~[purpur-1.20.jar:git-Purpur-1990]
	at io.papermc.paper.plugin.provider.type.spigot.SpigotPluginProvider.createInstance(SpigotPluginProvider.java:35) ~[purpur-1.20.jar:git-Purpur-1990]
	at io.papermc.paper.plugin.entrypoint.strategy.modern.ModernPluginLoadingStrategy.loadProviders(ModernPluginLoadingStrategy.java:116) ~[purpur-1.20.jar:git-Purpur-1990]
	at io.papermc.paper.plugin.storage.SimpleProviderStorage.enter(SimpleProviderStorage.java:39) ~[purpur-1.20.jar:git-Purpur-1990]
	at io.papermc.paper.plugin.entrypoint.LaunchEntryPointHandler.enter(LaunchEntryPointHandler.java:36) ~[purpur-1.20.jar:git-Purpur-1990]
	at org.bukkit.craftbukkit.v1_20_R1.CraftServer.loadPlugins(CraftServer.java:445) ~[purpur-1.20.jar:git-Purpur-1990]
	at net.minecraft.server.dedicated.DedicatedServer.initServer(DedicatedServer.java:307) ~[purpur-1.20.jar:git-Purpur-1990]
	at net.minecraft.server.MinecraftServer.runServer(MinecraftServer.java:1117) ~[purpur-1.20.jar:git-Purpur-1990]
	at net.minecraft.server.MinecraftServer.lambda$spin$0(MinecraftServer.java:323) ~[purpur-1.20.jar:git-Purpur-1990]
	at java.lang.Thread.run(Thread.java:1583) ~[?:?]
Caused by: java.lang.NullPointerException: Cannot invoke "com.xxmicloxx.NoteBlockAPI.NoteBlockAPI.doAsync(java.lang.Runnable)" because "this.plugin" is null
	at com.xxmicloxx.NoteBlockAPI.songplayer.SongPlayer.start(SongPlayer.java:312) ~[NoteBlockAPI-1.6.2-SNAPSHOT.jar:?]
	at com.xxmicloxx.NoteBlockAPI.songplayer.SongPlayer.<init>(SongPlayer.java:98) ~[NoteBlockAPI-1.6.2-SNAPSHOT.jar:?]
	at com.xxmicloxx.NoteBlockAPI.songplayer.SongPlayer.<init>(SongPlayer.java:75) ~[NoteBlockAPI-1.6.2-SNAPSHOT.jar:?]
	at com.xxmicloxx.NoteBlockAPI.songplayer.SongPlayer.<init>(SongPlayer.java:59) ~[NoteBlockAPI-1.6.2-SNAPSHOT.jar:?]
	at com.xxmicloxx.NoteBlockAPI.songplayer.RangeSongPlayer.<init>(RangeSongPlayer.java:22) ~[NoteBlockAPI-1.6.2-SNAPSHOT.jar:?]
	at com.xxmicloxx.NoteBlockAPI.songplayer.PositionSongPlayer.<init>(PositionSongPlayer.java:25) ~[NoteBlockAPI-1.6.2-SNAPSHOT.jar:?]
	at xyz.cowgl.moosussyplaymusicincowsaysgamepluginbycowgl.MooSussyPlayMusicInCowSaysGamePluginByCowGL.<init>(MooSussyPlayMusicInCowSaysGamePluginByCowGL.java:20) ~[MooSussyPlayMusicInCowSaysGamePluginByCowGL-1.0.jar:?]
	at jdk.internal.reflect.DirectConstructorHandleAccessor.newInstance(DirectConstructorHandleAccessor.java:62) ~[?:?]
	at java.lang.reflect.Constructor.newInstanceWithCaller(Constructor.java:502) ~[?:?]
	at java.lang.reflect.ReflectAccess.newInstance(ReflectAccess.java:128) ~[?:?]
	at jdk.internal.reflect.ReflectionFactory.newInstance(ReflectionFactory.java:304) ~[?:?]
	at java.lang.Class.newInstance(Class.java:725) ~[?:?]
	at org.bukkit.plugin.java.PluginClassLoader.<init>(PluginClassLoader.java:88) ~[purpur-api-1.20-R0.1-SNAPSHOT.jar:?]
	at io.papermc.paper.plugin.provider.type.spigot.SpigotPluginProvider.createInstance(SpigotPluginProvider.java:123) ~[purpur-1.20.jar:git-Purpur-1990]
	... 9 more

[koca2000]

Hi! It looks like NoteBlockAPI is not initialized or running. That is most commonly caused by shading. Make sure that you are not shading the NoteBlockAPI in your pom or build.gradle file. Also I assume that you added the NoteBlockAPI as depend or softdepend in your plugin.yml.

[charlie-moomoo]

I'm not shading it, and yes, I add the API to depend.

[koca2000]

Would you show me your pom or build.gradle file?

[charlie-moomoo]

Would you show me your pom or build.gradle file?

Sure.

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="https://maven.apache.org/POM/4.0.0"
         xmlns:xsi="https://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="https://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>xyz.cowgl</groupId>
    <artifactId>MooSussyPlayMusicInCowSaysGamePluginByCowGL</artifactId>
    <version>1.0</version>
    <packaging>jar</packaging>

    <name>MooSussyPlayMusicInCowSaysGamePluginByCowGL</name>

    <properties>
        <java.version>1.8</java.version>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    </properties>

    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.8.1</version>
                <configuration>
                    <source>${java.version}</source>
                    <target>${java.version}</target>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-shade-plugin</artifactId>
                <version>3.2.4</version>
                <executions>
                    <execution>
                        <phase>package</phase>
                        <goals>
                            <goal>shade</goal>
                        </goals>
                        <configuration>
                            <createDependencyReducedPom>false</createDependencyReducedPom>
                        </configuration>
                    </execution>
                </executions>
            </plugin>
        </plugins>
        <resources>
            <resource>
                <directory>src/main/resources</directory>
                <filtering>true</filtering>
            </resource>
        </resources>
    </build>

    <repositories>
        <repository>
            <id>spigotmc-repo</id>
            <url>https://hub.spigotmc.org/nexus/content/repositories/snapshots/</url>
        </repository>
        <repository>
            <id>sonatype</id>
            <url>https://oss.sonatype.org/content/groups/public/</url>
        </repository>
        <repository>
            <id>placeholderapi</id>
            <url>https://repo.extendedclip.com/content/repositories/placeholderapi/</url>
        </repository>
        <repository>
            <id>jitpack.io</id>
            <url>https://jitpack.io</url>
        </repository>
    </repositories>

    <dependencies>
        <dependency>
            <groupId>org.spigotmc</groupId>
            <artifactId>spigot-api</artifactId>
            <version>1.20.4-R0.1-SNAPSHOT</version>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>me.clip</groupId>
            <artifactId>placeholderapi</artifactId>
            <version>2.11.5</version>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>com.github.koca2000</groupId>
            <artifactId>NoteBlockAPI</artifactId>
            <version>1.6.2</version>
            <scope>provided</scope>
        </dependency>
    </dependencies>
</project>

[charlie-moomoo]

Any updates on this?

[charlie-moomoo]

I just found where the problem is. It's because I'm not creating the player in onEnable.