bitronix - Не удалось найти текущую транзакцию JTA

Привет, у меня есть веб-приложение Java, использующее Spring и Hibernate.

У меня есть класс модели под названием Role. Для всех классов моделей есть общий GenericDao.java

public interface GenericDao<T>{
    public void insert(T transientInstance);      
    public T findById(Class<?> clazz, Serializable id); 
}

GenericHibernateDao.java

@Repository
public class GenericHibernateDao<T extends Serializable>
implements GenericDao<T>{

    @Resource
    protected SessionFactory sessionFactory;

    @Override
    public void insert(T transientInstance) {
        sessionFactory.getCurrentSession().persist(transientInstance);
    }
        @SuppressWarnings("unchecked")
    @Override
    public T findById(Class<?> clazz, Serializable id) {
        return (T) sessionFactory.getCurrentSession().get(clazz, id);
        }
}

RoleService.java

public interface RoleService {
    public void insert(Role role);
    public Role findById(Integer id);
}

И имеет свою реализацию RoleServiceImpl.java

@Service
public class RoleServiceImpl implements RoleService {

    @Autowired
    private GenericDao<Role> roleDao;

    @Override
    public void insert(Role role) {
        roleDao.insert(role);
    }

    @Override
    public Role findById(Integer id) {
        return roleDao.findById(Role.class, id);
    }
}

У меня есть контроллер, который вызывает этот метод findbyid и передает значение — RegisterController.java

@Controller
public class UserRegisterController {

    @Autowired
    public RoleService roleService;

    @RequestMapping(value = "/register", method = RequestMethod.POST, consumes= MediaType.APPLICATION_JSON_VALUE)
    @ResponseBody
    public void registerUser(@RequestBody User user)
    {
        Role role=new Role();
        role=roleService.findById(1);
        System.out.println("Saved");
    }
}

Наконец, мой весенний applicationContext.xml

<bean id="dataSource" class="bitronix.tm.resource.jdbc.PoolingDataSource"
        init-method="init" destroy-method="close">
        <property name="className"
            value="com.mysql.jdbc.jdbc2.optional.MysqlXADataSource" />
        <property name="uniqueName" value="ocr/DocumentDatabase" />
        <property name="minPoolSize" value="1" />
        <property name="maxPoolSize" value="5" />
        <property name="automaticEnlistingEnabled" value="true" />
        <property name="allowLocalTransactions" value="true" />
        <property name="useTmJoin" value="true" />
        <property name="shareTransactionConnections" value="true" />
        <property name="driverProperties">
            <props>
                <prop key="url">${jdbc.url}</prop>
                <prop key="user">${jdbc.username}</prop>
                <prop key="password">${jdbc.password}</prop>
            </props>
        </property>
    </bean>
    <bean id="bitronixTransactionManager" factory-method="getTransactionManager"
        class="bitronix.tm.TransactionManagerServices" depends-on="btmConfig, dataSource"
        destroy-method="shutdown" />

    <bean id="transactionManager"
        class="org.springframework.transaction.jta.JtaTransactionManager">
        <property name="transactionManager" ref="bitronixTransactionManager" />
        <property name="userTransaction" ref="bitronixTransactionManager" />
    </bean>
    <tx:annotation-driven transaction-manager="transactionManager" />

    <bean id="sessionFactory"
        class="org.springframework.orm.hibernate4.LocalSessionFactoryBean"
        destroy-method="destroy">
        <property name="dataSource" ref="dataSource" />
        <property name="jtaTransactionManager" ref="transactionManager"/>
        <property name="configLocation" value="classpath:hibernate.cfg.xml" />
        <property name="hibernateProperties">
            <props>
                <prop key="hibernate.dialect">${hibernate.dialect}</prop>
                <prop key="hibernate.query.substitutions">true 'Y', false 'N'</prop>
            </props>
        </property>
    </bean>

Я запускаю это приложение в tomcat. Выдает следующую ошибку.

SEVERE: Servlet.service() for servlet [myappdemo] in context with path [/myappdemo] threw exception [Request processing failed; nested exception is org.hibernate.HibernateException: Unable to locate current JTA transaction] with root cause
org.hibernate.HibernateException: Unable to locate current JTA transaction
    at org.hibernate.context.internal.JTASessionContext.currentSession(JTASessionContext.java:88)
    at org.springframework.orm.hibernate4.SpringSessionContext.currentSession(SpringSessionContext.java:90)
    at org.hibernate.internal.SessionFactoryImpl.getCurrentSession(SessionFactoryImpl.java:980)
    at com.myapp.myappdemo.dao.hibernate.GenericHibernateDao.findById(GenericHibernateDao.java:46)
    at com.myapp.myappdemo.dao.hibernate.GenericHibernateDao.findById(GenericHibernateDao.java:15)
    at com.myapp.myappdemo.service.impl.RoleServiceImpl.findById(RoleServiceImpl.java:38)
    at com.myapp.myappdemo.web.UserRegisterController.registerUser(UserRegisterController.java:36)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:606)
    at org.springframework.web.method.support.InvocableHandlerMethod.invoke(InvocableHandlerMethod.java:219)
    at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:132)
    at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:104)
    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandleMethod(RequestMappingHandlerAdapter.java:745)
    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:686)
    at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:80)
    at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:925)
    at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:856)
    at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:920)
    at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:827)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:647)
    at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:801)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)
    at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:953)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
    at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1023)
    at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589)
    at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:310)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
    at java.lang.Thread.run(Thread.java:744)

Это происходит, когда я звоню в roleService.findById(1);

Почему это происходит? И как я могу решить?

Я использую spring 3.2.1.RELEASE, Hibernate 4.2.0.Final, btm 2.1.3.