Spring4 @Scheduled @Transaction throws no transaction is in progress at flush for mutliple dataSources

I have resolved this issue by changing transactionManager configuration for the internal dataSource. It looks default transactionManager configured by @EnableTransactionManagement is DataSourceTransactionManager and somehow begin() method on hibernate AbstractTransactionImpl isn't called, if job comes from any scheduler. So I change the DataSourceTransactionManager for internal dataSource to JpaTransactionManager like below. now all transactions for both dataSource go successfully whether the job comes from scheduler or UI. So I think my issue addressed on this post has been fixed

@Configuration
@EnableAutoConfiguration
@EnableScheduling
@EnableAsync
@EnableAspectJAutoProxy
@ComponentScan("com.my.client")
@EnableTransactionManagement
@EnableJpaRepositories(
    entityManagerFactoryRef = "entityManagerFactory",
    transactionManagerRef = "transactionManager",
    basePackages = {"com.my.database.repository"})
public class ServerConfig extends SpringBootServletInitializer implements SchedulingConfigurer, AsyncConfigurer {

    static Logger log = Logger.getLogger(ServerModeConfig.class.getName());

    @Autowired
    JpaVendorAdapter jpaVendorAdapter;

    @Autowired
    DataSource dataSource;

    @Bean(name = "entityManager")
    public EntityManager entityManager() {
        return entityManagerFactory().createEntityManager();
    }

    @Primary
    @Bean(name = "entityManagerFactory")
    EntityManagerFactory entityManagerFactory() {
        LocalContainerEntityManagerFactoryBean emf = new LocalContainerEntityManagerFactoryBean();
        emf.setDataSource(dataSource);
        emf.setJpaVendorAdapter(jpaVendorAdapter);
        emf.setPackagesToScan("com.my.client.database.model");
        emf.setPersistenceUnitName("default");
        emf.afterPropertiesSet();
        return emf.getObject();
    }

    @Bean(name = "transactionManager")
    public PlatformTransactionManager transactionManager() {
        JpaTransactionManager tm = new JpaTransactionManager();
        tm.setEntityManagerFactory(entityManagerFactory());
        return tm;
    }

    @Override
    public void configureTasks(ScheduledTaskRegistrar taskRegistrar) {
        taskRegistrar.setScheduler(taskExecutor());
    }

    /**
     * get executor for scheduling job
     * @return scheduled executor
     */
    @Bean(destroyMethod="shutdown")
    public Executor taskExecutor() {
        return Executors.newScheduledThreadPool(20);
    }

    /**
     * get executor for async job
     * @return executor for asynchronous job but no time limit
     */
    @Override
    public Executor getAsyncExecutor() {
        ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();
        executor.setCorePoolSize(20);
        executor.setMaxPoolSize(100);
        executor.setQueueCapacity(200);
        executor.initialize();
        return executor;
    }

    @Override
    public AsyncUncaughtExceptionHandler getAsyncUncaughtExceptionHandler() {
        return new MyClientAsyncExceptionHandler();
    }

}

I had same probem with a @Transactional @Scheduled method. Making method public solved the problem. I don't no why!