Could not initialize class org.springframework.orm.jpa.vendor.SpringHibernateJpaPersistenceProvider - spring

Question

I'm trying to learn Spring Data JPA and I'm getting the following exception:
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactory' defined in org.mql.gestionstages.config.PersistanceJPAConfig: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean]: Factory method 'entityManagerFactory' threw exception; nested exception is java.lang.NoClassDefFoundError: Could not initialize class org.springframework.orm.jpa.vendor.SpringHibernateJpaPersistenceProvider
I have the following configuration class for JPA :
#Configuration
#EnableTransactionManagement
public class PersistanceJPAConfig {
#Bean
public LocalContainerEntityManagerFactoryBean entityManagerFactory() {
LocalContainerEntityManagerFactoryBean em
= new LocalContainerEntityManagerFactoryBean();
em.setDataSource(dataSource());
em.setPackagesToScan(new String[] { "mypackage.models" });
**JpaVendorAdapter vendorAdapter = new HibernateJpaVendorAdapter();**
em.setJpaVendorAdapter(vendorAdapter);
em.setJpaProperties(additionalProperties());
return em;
}
#Bean
public DriverManagerDataSource dataSource(){
DriverManagerDataSource dataSource = new DriverManagerDataSource();
dataSource.setDriverClassName("com.mysql.cj.jdbc.Driver");
dataSource.setUrl("jdbc:mysql://localhost:3306/gestion_stages");
dataSource.setUsername("root");
dataSource.setPassword("");
return dataSource;
}
#Bean
public PlatformTransactionManager transactionManager(EntityManagerFactory emf) {
JpaTransactionManager transactionManager = new JpaTransactionManager();
transactionManager.setEntityManagerFactory(emf);
return transactionManager;
}
#Bean
public PersistenceExceptionTranslationPostProcessor exceptionTranslation(){
return new PersistenceExceptionTranslationPostProcessor();
}
Properties additionalProperties() {
Properties properties = new Properties();
properties.setProperty("hibernate.hbm2ddl.auto", "create-drop");
properties.setProperty("hibernate.dialect", "org.hibernate.dialect.MySQL57Dialect");
return properties;
}
}
The exception is thrown in this line:
JpaVendorAdapter vendorAdapter = new HibernateJpaVendorAdapter();
These are all the jars I have in my /WEB-INF/lib folder:
aspectjweaver-1.9.5.jar
hibernate-core-5.2.17.Final.jar
hibernate-entitymanager-5.2.17.Final.jar
hibernate-jpa-2.1-api-1.0.2.Final.jar
hibernate-jpamodelgen-5.2.17.Final.jar
javax.servlet.jsp.jstl-1.2.2.jar
javax.servlet.jsp.jstl-api-1.2.2.jar
mysql-connector-java-8.0.13.jar
org.eclipse.persistence.jpa-2.6.8.jar
spring-aop-5.2.2.RELEASE.jar
spring-aspects-5.2.2.RELEASE.jar
spring-beans-5.2.2.RELEASE.jar
spring-context-5.2.2.RELEASE.jar
spring-core-5.2.2.RELEASE.jar
spring-data-commons-2.2.2.RELEASE.jar
spring-data-jpa-2.2.2.RELEASE.jar
spring-expression-5.2.2.RELEASE.jar
spring-jcl-5.2.2.RELEASE.jar
spring-jdbc-5.2.2.RELEASE.jar
spring-orm-5.2.2.RELEASE.jar
spring-tx-5.2.2.RELEASE.jar
spring-web-5.2.2.RELEASE.jar
spring-webmvc-5.2.2.RELEASE.jar

Answer 1

The root exception is NoClassDefFoundError: Could not initialize class org.springframework.orm.jpa.vendor.SpringHibernateJpaPersistenceProvider which basically means you are missing a jar.
To gather all the required jars for an application is a PITA, I therefore strongly suggest to switch to a dependency management solution like Maven where you declare a dependency to Spring Data JPA and it gathers all the transient dependencies for you.