Spring/Hibernate No session found for current thread (config) - spring

Question

I'm trying to understand the configuration for Spring and Hibernate together. Every time I make calls to the database, I get a no session found for current thread error in my console (doesn't stop the app since I just create a new session if it can't find one). I have a standard STS Maven setup. The below is how I have the configuration currently setup. However, if I take everything in the root-context.xml and put it at the bottom of servlet-context.xml, it works without any errors. So I'm guessing something within servlet-context.xml is "overwriting" something and not taking the #Transactional annotations I have on my service. But how do you config around that?
root-context.xml
<!-- Configure JDBC Connection-->
<bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName" value="org.apache.derby.jdbc.EmbeddedDriver" />
<property name="url" value="jdbc:derby:C:\Users\Steven\Desktop\Programming\db-derby-10.10.1.1-bin\db-derby-10.10.1.1-bin\bin\mydb" />
</bean>
<!-- Configure Hibernate 4 Session Factory -->
<bean id="sessionFactory" class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
<property name="dataSource">
<ref bean="dataSource" />
</property>
<property name="packagesToScan" value="com.css.genapp" />
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">org.hibernate.dialect.DerbyTenSevenDialect</prop>
<prop key="hibernate.show_sql">true</prop>
</props>
</property>
</bean>
<tx:annotation-driven transaction-manager="transactionManager" />
<bean id="transactionManager" class="org.springframework.orm.hibernate4.HibernateTransactionManager">
<property name="sessionFactory" ref="sessionFactory" />
</bean>
servlet-context.xml
<!-- Enables the Spring MVC #Controller programming model -->
<annotation-driven />
<!-- Handles HTTP GET requests for /resources/** by efficiently serving up static resources in the ${webappRoot}/resources directory -->
<resources mapping="/resources/**" location="/resources/" />
<!-- Resolves views selected for rendering by #Controllers to .jsp resources in the /WEB-INF/views directory -->
<beans:bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<beans:property name="prefix" value="/WEB-INF/views/" />
<beans:property name="suffix" value=".jsp" />
</beans:bean>
<beans:bean id="messageSource" class="org.springframework.context.support.ResourceBundleMessageSource">
<beans:property name="basenames">
<beans:list>
<beans:value>format</beans:value>
</beans:list>
</beans:property>
</beans:bean>
<beans:bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver" />
<context:component-scan base-package="com.css.genapp" />

Answer 1

You must define component scan on both servlet-context.xml and root-context.xml
root-context.xml: for service, repository...
servlet-context.xml: for controller and web relate component.
Hope it can help. You can check detail on this sample Spring, JPA and hibernate integration

Answer 2

I think in your Hibernate configuration you configured <prop key="hibernate.current_session_context_class">thread</prop> Like this.
Remove the property because it really breaks proper session/transaction management in spring.

Answer 3

You have to import root-context.xml since only servlet-context.xml will be read by dispatcher servlet. Add the following line in your servlet-context.xml :