Question

I am using Spring + JPA + Hibernate + EntityManager to talk to the database. I am getting ‘A JTA EntityManager cannot use getTransaction()‘ error. Please provide your insights and help me resolve the issue.

beans.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans default-autowire="byName"
    ... xmlns definitions...
      xsi:schemaLocation="...">

    <context:component-scan base-package="com.mycompany.myproject" />

    <bean id="entityManagerFactory" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean" />
    <bean class="org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor" />

    <bean id="myDAO" class="com.mycompany.myproject.dao.myDAO" />

    <bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager">
        <property name="entityManagerFactory" ref="entityManagerFactory" />
    </bean>

    <tx:annotation-driven />
</beans>

persistence.xml

<?xml version="1.0" encoding="UTF-8"?>
<persistence ... xmlns definitions xsi:schemaLocation="..." version="1.0">
    <persistence-unit name="TEST_DS">
        <provider>org.hibernate.ejb.HibernatePersistence</provider>
        <jta-data-source>java:/TEST_DS</jta-data-source>
        <class>com.twinspires.exchange.model.Test</class>
        <properties>
            <property name="hibernate.archive.autodetection" value="class, hbm" />
            <property name="hibernate.dialect" value="org.hibernate.dialect.MySQLDialect" />
            <property name="hibernate.hbm2ddl.auto" value="validate" /> <!-- create-drop update -->
            <property name="hibernate.cache.use_query_cache" value="true" />
            <property name="hibernate.show_sql" value="true" />
            <property name="hibernate.cache.provider_class" value="org.hibernate.cache.HashtableCacheProvider" />
              <property name="hibernate.transaction.manager_lookup_class" value="org.hibernate.transaction.JBossTransactionManagerLookup"/>             
        </properties>
    </persistence-unit>
</persistence>

Exception Stack Trace (Excerpt)

15:47:43,340 INFO  [STDOUT] DEBUG: org.springframework.transaction.annotation.AnnotationTransactionAttributeSource - Adding transactional method 'getName' with attribute: PROPAGATION_REQUIRED,ISOLATION_DEFAULT; ''
15:47:43,343 INFO  [STDOUT] DEBUG: org.springframework.beans.factory.support.DefaultListableBeanFactory - Returning cached instance of singleton bean 'transactionManager'
15:47:43,356 INFO  [STDOUT] DEBUG: org.springframework.orm.jpa.JpaTransactionManager - Creating new transaction with name [com.twinspires.exchange.dao.PicDAO.getName]: PROPAGATION_REQUIRED,ISOLATION_DEFAULT; ''
15:47:44,114 INFO  [STDOUT] DEBUG: org.springframework.orm.jpa.JpaTransactionManager - Opened new EntityManager [org.hibernate.ejb.EntityManagerImpl@c629e5] for JPA transaction
15:47:44,124 INFO  [STDOUT] DEBUG: org.springframework.orm.jpa.JpaTransactionManager - Could not rollback EntityManager after failed transaction begin
15:47:44,125 INFO  [STDOUT] java.lang.IllegalStateException: A JTA EntityManager cannot use getTransaction()
15:47:44,125 INFO  [STDOUT]     at org.hibernate.ejb.AbstractEntityManagerImpl.getTransaction(AbstractEntityManagerImpl.java:818)
15:47:44,126 INFO  [STDOUT]     at org.springframework.orm.jpa.JpaTransactionManager.closeEntityManagerAfterFailedBegin(JpaTransactionManager.java:412)
15:47:44,127 INFO  [STDOUT]     at org.springframework.orm.jpa.JpaTransactionManager.doBegin(JpaTransactionManager.java:381)
15:47:44,128 INFO  [STDOUT]     at org.springframework.transaction.support.AbstractPlatformTransactionManager.getTransaction(AbstractPlatformTransactionManager.java:371)
15:47:44,129 INFO  [STDOUT]     at org.springframework.transaction.interceptor.TransactionAspectSupport.createTransactionIfNecessary(TransactionAspectSupport.java:335)
15:47:44,129 INFO  [STDOUT]     at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:105)
15:47:44,130 INFO  [STDOUT]     at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
15:47:44,131 INFO  [STDOUT]     at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:202)
15:47:44,131 INFO  [STDOUT]     at $Proxy175.getName(Unknown Source)

Folowing is my dao class:-

public class MyDao implements IMyDao {
      @PersistenceContext(unitName = "TEST_DS")
      private EntityManager entityManager;

      @Transactional
      public String getName() {            
            final Query query = entityManager.createQuery("from TestTable");
            final Object obj = query.getResultList().get(0);
            return obj == null ? "Empty" : (String) obj;
      }
}

Your help highly appreciated.

Answer 1

Remove the jta-datasource from persitence.xml, configure datasource as a bean j2ee:jdni-lookup and inject it into the LocalContainerEntityManagerFactoryBean

Remove this from persistence.xml

<jta-data-source>java:/TEST_DS</jta-data-source>

Configure the transaction-type to resource local

 <persistence-unit name="TEST_DS" transaction-type="RESOURCE_LOCAL">

Change to your beans.xml

<j2ee:jndi-lookup id="dataSource"  jndi-name="java:/TEST_DS"/>

 <bean id="entityManagerFactory" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
   <property name="dataSource" ref="dataSource"/>
</bean>