ClassCastException in JpaHibernateConnectionProvider with spring 5.3

[7erg]

Exception:
java.lang.ClassCastException: class com.sun.proxy.$Proxy113 cannot be cast to class org.hibernate.internal.SessionImpl (com.sun.proxy.$Proxy113 and org.hibernate.internal.SessionImpl are in unnamed module of loader 'app')
at org.javers.spring.jpa.JpaHibernateConnectionProvider.getConnection(JpaHibernateConnectionProvider.java:22)

Here
(SessionImpl)entityManager.unwrap(Session.class);

entityManager.unwrap(Session.class) now returns Proxy instead of SessionImpl instance, because of changes in HibernateJpaVendorAdapter: entityManagerInterface changed from HibernateEntityManager (deprecated) to Session.

Probable fix: (SessionImpl)entityManager.unwrap(SessionImpl.class);

[temofey1989]

+1

[qanik1307]

Probably related: java.lang.ClassCastException: class com.sun.proxy.$Proxy185 cannot be cast to class org.hibernate.engine.spi.SessionFactoryImplementor (com.sun.proxy.$Proxy185 and org.hibernate.engine.spi.SessionFactoryImplementor are in unnamed module of loader 'app')
at org.javers.spring.boot.sql.JaversSqlAutoConfiguration.javersSqlDialectName(JaversSqlAutoConfiguration.java:55)

[temofey1989]

Unfortunately javersSqlDialectName bean has no @ConditionalOnMissingBean annotation. So, it hard to override this bean.

Also, the same problem with casting in the JpaHibernateConnectionProvider.

I'm using:

• Spring Boot 2.4.0
• Javers 5.13.2
• Hibernate 5.4.23.Final

The workaround for me is:

• exclude Javers autoconfiguration

  @SpringBootApplication(
      exclude = [JaversSqlAutoConfiguration::class]
  )
  

• define a custom configuration with overrides:

  @Configuration
  class Config : JaversSqlAutoConfiguration() {
  
      @PersistenceContext
      lateinit var entityManager: EntityManager
  
      @Autowired
      lateinit var entityManagerFactory: EntityManagerFactory
  
      @Bean
      override fun javersSqlDialectName(): DialectName {
          val implementor = entityManagerFactory.unwrap(SessionFactoryImplementor::class.java)
          return DialectMapper().map(implementor.jdbcServices.dialect)
      }
  
      @Bean
      override fun jpaConnectionProvider(): ConnectionProvider {
          return ConnectionProvider {
              val session = (entityManager.unwrap(Session::class.java) as EntityManagerProxy).targetEntityManager as SessionImpl
              session.connection()
          }
      }
  }
  

I hope this would be useful for someone... 😃

[bartoszwalacik]

Which version of Hibernate do you use?

[7erg]

Which version of Hibernate do you use?

5.4.23.Final

[bartoszwalacik]

#1035

[bartoszwalacik]

fixed in 5.14.0