spring事务异常

spring配置多个数据源和事务的时候，当一个service去调用另外一个service时，两个servcie的事务必须一样，否则会出现以下异常：

javax.servlet.ServletException: org.springframework.transaction.IllegalTransactionStateException: Pre-bound JDBC Connection found! HibernateTransactionManager does not support running within DataSourceTransactionManager if told to manage the DataSource itself. It is recommended to use a single HibernateTransactionManager for all transactions on a single DataSource, no matter whether Hibernate or JDBC access.