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  1. ,
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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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    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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java.lang.ClassNotFoundException: weka.classifiers.functions.SMO	at java.net.URLClassLoader$1.run(URLClassLoader.java:366)	at java.net.URLClassLoader$1.run(URLClassLoader.java:355)	at java.security.AccessController.doPrivileged(Native Method)	at java.net.URLClassLoader.findClass(URLClassLoader.java:354)	at java.lang.ClassLoader.loadClass(ClassLoader.java:425)	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)	at java.lang.ClassLoader.loadClass(ClassLoader.java:358)	at java.lang.Class.forName0(Native Method)	at java.lang.Class.forName(Class.java:278)	at java.io.ObjectInputStream.resolveClass(ObjectInputStream.java:628)	at java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1620)	at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1521)	at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1779)	at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1353)	at java.io.ObjectInputStream.readObject(ObjectInputStream.java:373)	at undefined.CaraClassifier.(CaraClassifier.java:18)	at undefined.CaraClassifier.main(CaraClassifier.java:52)