org.springframework.dao.RecoverableDataAccessException: ### Error querying database. Cause: com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure The last packet successfully received from the server was 1,142 milliseconds ago. The last packet sent successfully to the server was 1,141 milliseconds ago. ### The error may exist in org/tuliu/land/php/mapper/TuliuLandsTradersMapper.xml ### The error may involve org.tuliu.land.php.mapper.TuliuLandsTradersMapper.selectByPrimaryKey-Inline ### The error occurred while setting parameters ### SQL: select id, trader_name, trader_phone, gender, status, create_time, update_time, identity_tag, logo_url, wechart_url, contact_config,contact_nickname,work_wx_id,work_wx_group,source,csid from tuliu_lands_traders where id = ? ### Cause: com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure The last packet successfully received from the server was 1,142 milliseconds ago. The last packet sent successfully to the server was 1,141 milliseconds ago. ; SQL []; Communications link failure The last packet successfully received from the server was 1,142 milliseconds ago. The last packet sent successfully to the server was 1,141 milliseconds ago.; nested exception is com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure The last packet successfully received from the server was 1,142 milliseconds ago. The last packet sent successfully to the server was 1,141 milliseconds ago.