最近玩一个spring项目时报了一个很诡异的问题：错误如下：
2017-09-25 15:00:29.254 WARN [main] [|] o.s.beans.factory.support.DefaultListableBeanFactory.getTypeForFactoryBean(): - Bean creation exception on non-lazy FactoryBean type check: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'frsQueueInfoDao' defined in file [......class]: Unsatisfied dependency expressed through bean property 'sqlSessionFactory': Error creating bean with name 'sqlSessionFactory' defined in file [.....\target\classes\beans\beans-datasource.xml]: Cannot resolve reference to bean 'dataSource' while setting bean property 'dataSource'; nested exception is org.springframework.beans.factory.BeanCurrentlyInCreationException: Error creating bean with name 'dataSource': Requested bean is currently in creation: Is there an unresolvable circular reference?; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sqlSessionFactory' defined in file [.......\target\classes\beans\beans-datasource.xml]: Cannot resolve reference to bean 'dataSource' while setting bean property 'dataSource'; nested exception is org.springframework.beans.factory.BeanCurrentlyInCreationException: Error creating bean with name 'dataSource': Requested bean is currently in creation: Is there an unresolvable circular reference?
根据字面意思就是有循环依赖了，sqlSessionFactory 根据配置文件依赖dataSource，但是在创建dataSource时有问题，在dataSource配置的事务是
<bean name="transactionManager"
class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource"></property>
</bean>
<!-- 启用注解式事务 -->
<tx:annotation-driven proxy-target-class="false" transaction-manager="transactionManager" />
问题困扰了很久，包括启动debug，看源码都没有解决问题...........
因为这个配置文件一直都没有动过，肯定是加了什么其他的代码导致的，想想最近加了neo4j驱动的代码，就从注解开始看如下：
@Configuration
@EnableNeo4jRepositories(basePackages = "com.....frs.repositories")
@EnableTransactionManagement
public class GraphDBConfiguration extends Neo4jConfiguration {}
其中一个注解是@EnableTransactionManagement 这个路径是
import org.springframework.transaction.annotation.EnableTransactionManagement;
经查：
@EnableTransactionManagement
@EnableTransactionManagement注解开启注解式事务的支持。
注解@EnableTransactionManagement通知Spring，@Transactional注解的类被事务的切面包围。这样@Transactional就可以使用了。
根据现在neo4j的运用，我们不需要开启事务，所有注销此注解，再运行没有上述问题，
先记录一下上述解决问题及过程。具体原因后续更新