java.lang.NoClassDefFoundError: net/milkbowl/vault/economy/Economy

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jsp-api and servlet-api jars must NOT be deployed by your web app. They should be marked as provided but not deployed by your app.

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The server rejects all jars that already belong to the server runtime (such as tomcat-**.jar, servlet**.jar). Consider substituting the CORS filter you're using for this one: https://goo.gl/ctQ7Fs

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You might've forgot to add a dependency or it's written wrong. Also, you might be using incompatible versions of Java and Hibernate. More on this here: https://goo.gl/SjSlRA

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If you're using Hibernate, this indicates you're missing FasterXML Classmate dependency, which you can add to your dependencies. To add it, the groupId is com.fasterxml and artifactId is Classmate.

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Check if you didn't forget to instantiate your topic in the kafka broker.

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NoClassDefFoundError means java has failed to find a class you're trying to instantiate, look if you've added the class you're trying to instantiate to the dependencies.

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This error means there's a class missing in your classpath during runtime. You need to create a jar with all your dependencies and have it in your classpath. Check Maven Assembly Plugin and how to add your dependencies to a jar: https://goo.gl/U2zr8k

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You need to add httpcore to your dependencies. Try adding version 4.3 or further.

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    • java.lang.NoClassDefFoundError: net/milkbowl/vault/economy/Economy at net.citizensnpcs.Economy.init(Economy.java:21) at net.citizensnpcs.Citizens.onEnable(Citizens.java:122) at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:215) at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader.java:337) at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:381) at org.bukkit.craftbukkit.CraftServer.loadPlugin(CraftServer.java:256) at org.bukkit.craftbukkit.CraftServer.enablePlugins(CraftServer.java:238) at net.minecraft.server.MinecraftServer.t(MinecraftServer.java:381) at net.minecraft.server.MinecraftServer.a(MinecraftServer.java:368) at net.minecraft.server.MinecraftServer.init(MinecraftServer.java:197) at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:432) at net.minecraft.server.ThreadServerApplication.run(SourceFile:492) Caused by: java.lang.ClassNotFoundException: net.milkbowl.vault.economy.Economy at java.net.URLClassLoader$1.run(URLClassLoader.java:202) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:190) at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:41) at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:29) at java.lang.ClassLoader.loadClass(ClassLoader.java:306) at java.lang.ClassLoader.loadClass(ClassLoader.java:247) ... 12 more

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