@Transactional rollback is not working in spring boot application?

I am having a requirement where i need to insert some employee data into db2 database and below is the code for that :

@Log4j2
@Service
@Transactional
public class EmployeeServiceImpl extends EmployeeService{

@Autowired
private EmployeeDataRepository employeeDataRepository;

@Override
@Transactional(rollbackOn = {DataAccessException.class})
public void insertEmployeeData(List<Employee> employeeList){
 try{
     employeeDataRepository.insertEmployeeData(employeeList);
    }catch(DataAccessException ex){
      log.error("Exception whie inserting data in db {}",ex.getMessage());
    }
}

@Log4j2
@Repository
public class EmployeeDataRepositoryImpl implements EmployeeDataRepository{

@Autowired
private DataSource dataSource;

@Value("${db.schema}")
private String schema;

@Override
public void insertEmployeeData(List<Employee> employeeList){
   this.jdbcInsert = new SimpleJdbcInsert(dataSource).withTableName("Employee");
   for(Employee emp : employeeList){
    Map<String,Object> parameters = new HashMap<String,Object>();
      parameters.put("name", emp.name);
      parameters.put("age", emp.age);
      parameters.put("dateOfJoining", emp.dateOfJoining);
      parameters.put("address", emp.address);
      parameters.put("salary", emp.salary);
      jdbcInsert.execute(parameters);
      log.info("Created Record Name = " + name + " Age = " + age + " dateOfJoining = "+dateOfJoining);
      }
      return;
}

} 

using spring datasource properties datasource is configured and injected into EmployeeDataRepositoryImpl class. I am using SimpleJdbcInsert to insert data into db2 table. For transnational handling i am using @Transactional(rollbackOn = {DataAccessException.class}) on method. When the data is inserted one by one then if something goes wrong at db level then it should rollback but eventually its not happening. Also i tried putting annotation at class level but there is no luck. Please let me know if i am missing anything ?

You are having a couple of things mixed up here.

1. Spring rolls your transaction back, if a (Runtime)exception bubbles through your @Transactional method.
2. You are catching the DataAccessException exception, hence preventing the rollback.
3. There is also no need to specify the exception in rollbackOn.

Your code should read like this, this is enough.

@Transactional
public void insertEmployeeData(List<Employee> employeeList){
  employeeDataRepository.insertEmployeeData(employeeList);
}