{"msg":"\n### Error querying database.  Cause: com.mysql.cj.jdbc.exceptions.CommunicationsException: Communications link failure\n\nThe last packet successfully received from the server was 6,686 milliseconds ago. The last packet sent successfully to the server was 6,692 milliseconds ago.\n### The error may exist in com/bendibao/gotour/dao/dazhe/DazheCitySmallMapper.java (best guess)\n### The error may involve defaultParameterMap\n### The error occurred while setting parameters\n### SQL: SELECT  id,cityname,citycode,isopen,pid,pname,jd,wd,isarea,iscapital,sname,isforeign  FROM dazhe_city_small     WHERE (citycode = ?)\n### Cause: com.mysql.cj.jdbc.exceptions.CommunicationsException: Communications link failure\n\nThe last packet successfully received from the server was 6,686 milliseconds ago. The last packet sent successfully to the server was 6,692 milliseconds ago.\n; Communications link failure\n\nThe last packet successfully received from the server was 6,686 milliseconds ago. The last packet sent successfully to the server was 6,692 milliseconds ago.; nested exception is com.mysql.cj.jdbc.exceptions.CommunicationsException: Communications link failure\n\nThe last packet successfully received from the server was 6,686 milliseconds ago. The last packet sent successfully to the server was 6,692 milliseconds ago.","code":500000}