Spring @Transactional - javax.persistence.TransactionRequiredException

In the following schema

Controller -> Service -> DAO I'm trying to make Service operations @Transactional

in my UserService.fooFunction() i call

Entity e = dao.find(key)
e.setProperty(something)
dao.update(e)

in dao.update(e) at the end there is

em.flush() //EntityManager obtained by @PersistenceContext annotation (injected by spring IoC)

Calling flush() throws a persistenceException:

javax.persistence.TransactionRequiredException No externally managed transaction is currently active for this thread
    at org.eclipse.persistence.internal.jpa.transaction.JTATransactionWrapper.throwCheckTransactionFailedException(JTATransactionWrapper.java:86)

I'm running low on ideas what I've done wrong, any help would be appreciated :)

You can find chunks of my configuration below:

 <bean id="entityManagerFactory"  class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
    <property name="dataSource" ref="dataSource"/>
    <property name="persistenceUnitName" value="myPU" />
    <property name="jpaVendorAdapter">
        <bean class="org.springframework.orm.jpa.vendor.EclipseLinkJpaVendorAdapter" id="eclipselinkVendorAdapter">
        ..
        </bean>
    </property>

</bean>

<bean id="transactionManager" class="org.springframework.transaction.jta.JtaTransactionManager">

</bean>
<tx:annotation-driven  transaction-manager="transactionManager"/>

aop part:

    <aop:config>

    <aop:pointcut id="userServiceOperation"
      expression="execution(* org.mypackage.UserServiceImpl.*(..))"/>

    <aop:advisor pointcut-ref="userServiceOperation" advice-开发者_运维知识库ref="txUserServiceAdvice"/>

</aop:config>

<tx:advice id="txUserServiceAdvice">
    <tx:attributes>
        <tx:method name="get*" read-only="true" propagation="REQUIRES_NEW"/>
        <tx:method name="update*" read-only="false" propagation="REQUIRES_NEW"/>
        <tx:method name="*" propagation="REQUIRES_NEW"/>
    </tx:attributes>
</tx:advice>

no transactional annotations are present. When deploying my spring app one can see

[<date>] DEBUG support.DefaultListableBeanFactory: Returning cached instance of singleton bean 'org.springframework.transaction.config.internalTransactionAdvisor'
[<date>] DEBUG interceptor.NameMatchTransactionAttributeSource: Adding transactional method [get*] with attribute [PROPAGATION_REQUIRES_NEW,ISOLATION_DEFAULT,readOnly]
[<date>] DEBUG interceptor.NameMatchTransactionAttributeSource: Adding transactional method [update*] with attribute [PROPAGATION_REQUIRES_NEW,ISOLATION_DEFAULT]
[<date>] DEBUG interceptor.NameMatchTransactionAttributeSource: Adding transactional method [*] with attribute [PROPAGATION_MANDATORY,ISOLATION_DEFAULT]

Key problem was here

tx:annotation-driven only looks for @Transactional on beans in the same application context it is defined in. This means that, if you put in a WebApplicationContext for a DispatcherServlet, it only checks for @Transactional beans in your controllers, and not your services. See Section 15.2, “The DispatcherServlet” for more information.

Putting i the same application context as component-scan for services solved the problem :)

You declared JtaTransactionManager as your transaction manager. Are you sure your program is running in JTA-capable environment, such as a full-blown application server (JBoss, WebSphere, WebLogic, etc)?

If you don't have JTA environment, you need to use JPATransactionManager instead:

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