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ExceptionInInitializerError in Hibernate

As part of the Hibernate practice, I have faced the Exception in thread "main" java.lang.ExceptionInInitializerError at the time of creating the SessionFactory. Here is the full stacktrace which I have captured from console.

INFO: HHH000424: Disabling contextual LOB creation as createClob() method threw error : java.lang.reflect.InvocationTargetException
SessionFactory creation failed.org.hibernate.boot.registry.classloading.spi.ClassLoadingException: Unable to load class [com.javatbrains.sample.User]
Exception in thread "main" java.lang.ExceptionInInitializerError
       at com.jtb.util.HibernateUtil.buildSessionFactory(HibernateUtil.java:13)
       at com.jtb.util.HibernateUtil.getSessionFactory(HibernateUtil.java:18)
       at com.jtb.test.DeleteUser.main(DeleteUser.java:11)


Caused by: org.hibernate.boot.registry.classloading.spi.ClassLoadingException: Unable to load class [com.javatbrains.sample.User]
       at org.hibernate.boot.registry.classloading.internal.ClassLoaderServiceImpl.classForName(ClassLoaderServiceImpl.java:229)
       at org.hibernate.boot.model.source.internal.annotations.AnnotationMetadataSourceProcessorImpl.<init>(AnnotationMetadataSourceProcessorImpl.java:103)
       at org.hibernate.boot.model.process.spi.MetadataBuildingProcess$1.<init>(MetadataBuildingProcess.java:147)
       at org.hibernate.boot.model.process.spi.MetadataBuildingProcess.complete(MetadataBuildingProcess.java:141)
       at org.hibernate.boot.model.process.spi.MetadataBuildingProcess.build(MetadataBuildingProcess.java:83)
       at org.hibernate.boot.internal.MetadataBuilderImpl.build(MetadataBuilderImpl.java:418)
       at org.hibernate.boot.internal.MetadataBuilderImpl.build(MetadataBuilderImpl.java:87)
       at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:692)
       at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:724)
       at com.jtb.util.HibernateUtil.buildSessionFactory(HibernateUtil.java:10)
       ... 2 more
Caused by: java.lang.ClassNotFoundException: Could not load requested class : com.javatbrains.sample.User
       at org.hibernate.boot.registry.classloading.internal.ClassLoaderServiceImpl$AggregatedClassLoader.findClass(ClassLoaderServiceImpl.java:217)
       at java.lang.ClassLoader.loadClass(Unknown Source)
       at java.lang.ClassLoader.loadClass(Unknown Source)
       at java.lang.Class.forName0(Native Method)
       at java.lang.Class.forName(Unknown Source)
       at org.hibernate.boot.registry.classloading.internal.ClassLoaderServiceImpl.classForName(ClassLoaderServiceImpl.java:226)
       ... 11 more

Solution:
In the above stacktrace two issues got included.
1. INFO HHH000424 ERROR. You just simply ignore this or you add the below property into your hibernate.cfg.xml file.
<property name="hibernate.temp.use_jdbc_metadata_defaults">false</property>

2. System not able to identify the bean class which you have mapped in the hibernate.cfg.xml configuration file. Please pass the bean class with complete path like below.
<mapping class="com.hibernate.aiexample.model.User" />

Since I have placed the wrong package name in mapping tag, I have got this exception.

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Location: Bengaluru, Karnataka, India

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