{"msg":"运行时异常:\n### Error querying database.  Cause: com.mysql.cj.jdbc.exceptions.CommunicationsException: Communications link failure\n\nThe last packet successfully received from the server was 523 milliseconds ago. The last packet sent successfully to the server was 524 milliseconds ago.\n### The error may exist in URL [jar:file:/public/app/xxfw/xxfw/WEB-INF/lib/xxfwqd-system-4.7.3.jar!/mapper/system/SysIpBlackMapper.xml]\n### The error may involve com.ruoyi.system.mapper.SysIpBlackMapper.selectSysIpBlackList-Inline\n### The error occurred while setting parameters\n### SQL: select id, ip from sys_ip_black                WHERE  ip = ?\n### Cause: com.mysql.cj.jdbc.exceptions.CommunicationsException: Communications link failure\n\nThe last packet successfully received from the server was 523 milliseconds ago. The last packet sent successfully to the server was 524 milliseconds ago.\n; Communications link failure\n\nThe last packet successfully received from the server was 523 milliseconds ago. The last packet sent successfully to the server was 524 milliseconds ago.; nested exception is com.mysql.cj.jdbc.exceptions.CommunicationsException: Communications link failure\n\nThe last packet successfully received from the server was 523 milliseconds ago. The last packet sent successfully to the server was 524 milliseconds ago.","code":500}