被学校分到做一个知识图谱的项目，在用idea连接时后报了如下的错误 2021-02-26 23:02:38,928 ERROR (DirectJDKLog.java:175)- Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is org.springframework.dao.DataAccessResourceFailureException: Could not create driver instance; nested exception is org.neo4j.ogm.exception.ConnectionException: Could not create driver instance] with root cause org.neo4j.driver.v1.exceptions.ServiceUnavailableException: Connection to the database terminated. This can happen due to network instabilities, or due to restarts of the database 请问大概是什么问题，感谢大佬们帮助。