Exception after DAO-operation using WebSphere-8 / Spring 4 / Hibernate 4.3

StackOverflow https://stackoverflow.com/questions/23385395

Question

My WebSphere 8 driven portlet uses Spring 4 and Hibernate 4.3 over JPA. I have a JTA data source. This is my setup:

persistence.xml

  <?xml version="1.0" encoding="UTF-8"?>
  <persistence xmlns="http://java.sun.com/xml/ns/persistence"
               xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" version="2.0"
               xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_2_0.xsd"
  >
      <persistence-unit name="myUnit" transaction-type="JTA">
          <provider>org.hibernate.jpa.HibernatePersistenceProvider</provider>
          <jta-data-source>jdbc/mydb</jta-data-source>
          <properties>
              <property name="hibernate.transaction.jta.platform" value="org.hibernate.engine.transaction.jta.platform.internal.WebSphereExtendedJtaPlatform" />
              <property name="hibernate.transaction.factory_class" value="org.hibernate.engine.transaction.internal.jta.CMTTransactionFactory" />
              <property name="hibernate.dialect" value="org.hibernate.dialect.DB2Dialect" />
          </properties>
      </persistence-unit>
  </persistence>

my-portlet.xml

<tx:annotation-driven transaction-manager="transactionManager" />
<bean id="transactionManager" class="org.springframework.transaction.jta.WebSphereUowTransactionManager" />
<bean id="entityManagerFactory" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
    <property name="persistenceUnitName" value="myUnit" />
    <property name="jpaVendorAdapter">
        <bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter">
            <property name="databasePlatform" value="org.hibernate.dialect.DB2Dialect" />
            <property name="showSql" value="true" />
        </bean>
    </property>
</bean>

When my DAO-method is called, an exceptions are thrown:

00000090 RegisteredSyn E   WTRN0074E: Exception caught from before_completion synchronization operation: java.lang.IncompatibleClassChangeError
   at com.ibm.ws.uow.ComponentContextSynchronizationWrapper.beforeCompletion(ComponentContextSynchronizationWrapper.java:65)

and

(... servlet and portlet specific exceptions ...)
Caused by: org.springframework.transaction.TransactionSystemException: UOWManager transaction processing failed; nested exception is com.ibm.wsspi.uow.UOWException: javax.transaction.RollbackException
(...)
Caused by: java.lang.IncompatibleClassChangeError

This is my DAO-class:

  @Repository("myDao")
  @SuppressWarnings("unchecked")
  public class HibernateMyEntityDao implements MyEntityDao
  {
     @PersistenceContext(unitName = "myUnit")
     private EntityManager entityManager;

     public Session getSession()
     {
        return entityManager.unwrap(Session.class);
     }

     @Transactional
     public List<MyEntity> findActive()
     {
        Calendar date = Calendar.getInstance();
        Criteria crit = getSession().createCriteria(MyEntity.class);
        crit.setFirstResult(0);
        crit.setFetchSize(10);
        crit.add(Restrictions.le("start", date));
        crit.add(Restrictions.gt("end", date));
        return crit.list();
     }
  }

What am I doing wrong here?

Was it helpful?

Solution

A IncompatibleClassChangeError normally indicates that the dependency versions are incorrect. You can read more about it here and here.

It is probable that the combination of websphere 8, spring 4 and hibernate 4.3 are not compatible with each other. My guess is on hibernate 4.3 and websphere 8 not being compatible. Did you try with slightly older versions of spring and hibernate?

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