服务器未知运行时异常: 
### Error querying database.  Cause: com.mysql.cj.jdbc.exceptions.CommunicationsException: Communications link failure

The last packet successfully received from the server was 59,999 milliseconds ago.  The last packet sent successfully to the server was 60,033 milliseconds ago.
### The error may exist in com/casic/missiles/mapper/equipment/BizEquipmentMaintainMapper.java (best guess)
### The error may involve defaultParameterMap
### The error occurred while setting parameters
### SQL: SELECT COUNT(*) AS total FROM biz_equipment_maintain WHERE (maintain_type = ? AND log_no LIKE ? AND create_user_name LIKE ? AND check_result = ?)
### Cause: com.mysql.cj.jdbc.exceptions.CommunicationsException: Communications link failure

The last packet successfully received from the server was 59,999 milliseconds ago.  The last packet sent successfully to the server was 60,033 milliseconds ago.
; Communications link failure

The last packet successfully received from the server was 59,999 milliseconds ago.  The last packet sent successfully to the server was 60,033 milliseconds ago.; nested exception is com.mysql.cj.jdbc.exceptions.CommunicationsException: Communications link failure

The last packet successfully received from the server was 59,999 milliseconds ago.  The last packet sent successfully to the server was 60,033 milliseconds ago.