Spring Data lazyload does not LazyInitializationException - spring

Question

#Component
#Transactional
public class TestClass extends AbstractClass
{
#Autowire
ClassARepo classARepo;
#Override
public void test() {
ClassA classA = classARepo.findOne(1);
List<ClassB> list = classA.getClassBs();
list.size();
}
}
ClassB is mapped as onetomany and lazily loaded.
In the above code
classARepo.findOne(1);
Executes correctly. but
List<ClassB> list = classA.getClassBs();
list.size();
Fails with LazyInitializationException.
public interface ClassARepo extends CrudRepository<ClassA, Integer> {
}
Instance for TestA is created like the one below
#PersistJobDataAfterExecution
#DisallowConcurrentExecution
#Transactional
#Component
public class TestClassJOB extends AbstractJob
{
#Autowired
TestClass indexer;
}
Context:
<!-- JPA mapping configuration -->
<bean id="persistenceXmlLocation" class="java.lang.String">
<constructor-arg value="classpath:/persistence.xml"></constructor-arg>
</bean>
<!-- entity manager -->
<bean id="entityManagerFactory" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean"
p:dataSource-ref="dataSource" p:persistenceUnitName="jpaData"
p:persistenceXmlLocation-ref="persistenceXmlLocation">
<property name="packagesToScan" value="com..persist.entity" />
<property name="jpaVendorAdapter">
<bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter" />
</property>
</bean>
<!-- transaction manager -->
<bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager"
p:entityManagerFactory-ref="entityManagerFactory" lazy-init="true" p:dataSource-ref="dataSource" />
<!-- JPA repositories -->
<jpa:repositories base-package="com..persist.repo"
entity-manager-factory-ref="entityManagerFactory" transaction-manager-ref="transactionManager" />
I tried many resources and could not solve the issue. The following error message is displayed "could not initialize proxy - no Session".
What could be the cause of the issue?
When the session is available while classARepo.findOne(1) is called, why is not available during lazy fetch(list.size())?

Answer 1

The issue was the instance for TestClassJOB was created by Quartz. So the transnational proxy was not applied to the class which was the reason for the issue.
I fixed the issue by declaring a transaction template
#Autowired
TransactionTemplate transactionTemplate;
and then wrapping the code within
transactionTemplate.execute(new TransactionCallbackWithoutResult()
{
#Override
protected void doInTransactionWithoutResult(TransactionStatus status)
{
<code here>
}
}