Question

我尝试将项目从GlassFish迁移到Weblogic 12c。

我使用Hibernate 4.2.17并且出现以下错误当我的代码被调用以在Container中创建EntityManager时。

Caused By: java.lang.NullPointerException
    at org.hibernate.engine.transaction.internal.jta.CMTTransactionFactory.isJoinableJtaTransaction(CMTTransactionFactory.java:63)
    at org.hibernate.engine.transaction.internal.jta.CMTTransactionFactory.isJoinableJtaTransaction(CMTTransactionFactory.java:39)
    at org.hibernate.engine.transaction.internal.TransactionCoordinatorImpl.isTransactionJoinable(TransactionCoordinatorImpl.java:311)
    at org.hibernate.ejb.AbstractEntityManagerImpl.joinTransaction(AbstractEntityManagerImpl.java:1215)
    at org.hibernate.ejb.AbstractEntityManagerImpl.postInit(AbstractEntityManagerImpl.java:178)
    at org.hibernate.ejb.EntityManagerImpl.<init>(EntityManagerImpl.java:89)
    at org.hibernate.ejb.EntityManagerFactoryImpl.createEntityManager(EntityManagerFactoryImpl.java:193)
    at org.hibernate.ejb.EntityManagerFactoryImpl.createEntityManager(EntityManagerFactoryImpl.java:188)
    at weblogic.persistence.PersistenceContextWrapper.<init>(PersistenceContextWrapper.java:26)
    at weblogic.persistence.TransactionalEntityManagerProxyImpl.newPersistenceContext(TransactionalEntityManagerProxyImpl.java:152)
    at weblogic.persistence.TransactionalEntityManagerProxyImpl.getPersistenceContext(TransactionalEntityManagerProxyImpl.java:128)
    at weblogic.persistence.BasePersistenceContextProxyImpl.invoke(BasePersistenceContextProxyImpl.java:94)
    at weblogic.persistence.TransactionalEntityManagerProxyImpl.invoke(TransactionalEntityManagerProxyImpl.java:164)
    at weblogic.persistence.BasePersistenceContextProxyImpl.invoke(BasePersistenceContextProxyImpl.java:86)
    at com.sun.proxy.$Proxy346.createNamedQuery(Unknown Source)
    at rpm.jpa.crudservice.RpmJPAServiceImpl.findByNamedQuerySingle(RpmJPAServiceImpl.java:302)

persistence.xml：

<persistence-unit name="My_JPA_UNIT" transaction-type="JTA">
    <provider>org.hibernate.ejb.HibernatePersistence</provider>
    <jta-data-source>MyDS</jta-data-source>

    <class>....</class>
    <class>....</class>

    <properties>
        <property name="hibernate.generate_statistics" value="false" />
        <property name="hibernate.show_sql" value="true" />
        <property name="hibernate.level" value="ALL" />
        <property name="hibernate.logging.level" value="ALL" />
        <property name="hibernate.dialect" value="org.hibernate.dialect.SQLServer2008Dialect" />

        <property name="hibernate.transaction.jta.platform" value="org.hibernate.engine.transaction.jta.platform.internal.WebLogicJtaPlatform" />   

    </properties>
</persistence-unit>

我的代码：

    @Stateless
    @Local(RpmJPAService.class)
    @TransactionAttribute(TransactionAttributeType.MANDATORY)
    public class RpmJPAServiceImpl implements RpmJPAService
    {    
        @PersistenceContext(unitName = "My_JPA_UNIT")
        EntityManager em;

        @SuppressWarnings("unchecked")
        @Override
        public <T>T findByNamedQuerySingle(final String queryName, final Object... parameters) throws PsAccessException
        {
            logQueryNameAndParameters(queryName, parameters);
            try
            {

    (line 302)  final Query q = setQueryParameters(em.createNamedQuery(queryName), parameters);

                return (T) q.getSingleResult();
            }
            catch(final NoResultException nre)
            {
                return null;
            }
            catch(final PersistenceException pe)
            {
                throw handleQuerySingleException(pe);
            }
        }
    }

是否有人遇到此错误？

Answer 1

通过在Hibernate 4.2.17中调试，我发现无法正确加载WeblogicJtaPlatform，这与Weblogic中Hibernate 4.2.17的ClassLoader有关。（还有hibernate.transaction.jta.platform实现类的包名称不同）

我将我的应用程序升级到Hibernate 4.3.10，并在persistence.xml中进行了一些更改，例如

   <provider>org.hibernate.jpa.HibernatePersistenceProvider</provider>

   <property name="hibernate.transaction.jta.platform" value="Weblogic" />

现在解决了WebLogicJtaPlatform的问题。

Weblogic 12c与Hibernate 4.2.17 JTA错误

1 个答案: