not allowed in read-only mode没配置事务，为何报事务方面的错

org.springframework.dao.InvalidDataAccessApiUsageException: Write operations are not allowed in read-only mode (FlushMode.MANUAL): Turn your Session into FlushMode.COMMIT/AUTO or remove 'readOnly' marker from transaction definition.
项目里面根本没配置任何有关事务的东西，为何会报关于事务的错，求解！框架是springmvc4+spring4+hibernate4

operations are not allowed in read-only mode

org.springframework.dao.InvalidDataAccessApiUsageException: Write operations are not allowed in read-only mode (FlushMode.NEVER/MANUAL): Turn your......
答案就在这里：operations are not allowed in read-only mode
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