org.bukkit.plugin.InvalidPluginException

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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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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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    • org.bukkit.plugin.InvalidPluginException: java.lang.NoClassDefFoundError: com/pneumaticraft/commandhandler/Command at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:151) at org.bukkit.plugin.SimplePluginManager.loadPlugin(SimplePluginManager.java:305) at org.bukkit.plugin.SimplePluginManager.loadPlugins(SimplePluginManager.java:230) at org.bukkit.craftbukkit.CraftServer.loadPlugins(CraftServer.java:213) at org.bukkit.craftbukkit.CraftServer.<init>(CraftServer.java:189) at net.minecraft.server.ServerConfigurationManager.<init>(ServerConfigurationManager.java:53) at net.minecraft.server.MinecraftServer.init(MinecraftServer.java:166) at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:432) at net.minecraft.server.ThreadServerApplication.run(SourceFile:492) Caused by: java.lang.NoClassDefFoundError: com/pneumaticraft/commandhandler/Command at java.lang.Class.forName0(Native Method) at java.lang.Class.forName(Class.java:247) at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:140) ... 8 more Caused by: java.lang.ClassNotFoundException: com.pneumaticraft.commandhandler.Command 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) ... 11 more

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