所有。我已经遇到了几天的问题，这是详细信息堆栈信息：
org.springframework.dao.RecoverableDataAccessException:
### Error updating database. Cause: com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure
The last packet successfully received from the server was 18,940 milliseconds ago. The last packet sent successfully to the server was 18,918 milliseconds ago.
### The error may involve com.tuan800.searchtask.model.dao.mybatis.RelationDao.updateSuggest-Inline
### The error occurred while setting parameters
### Cause: com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure
The last packet successfully received from the server was 18,940 milliseconds ago. The last packet sent successfully to the server was 18,918 milliseconds ago.
; SQL …