解決MySql - Communications link failure The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server. 的問題

 Communications link failure解決方法，我借鑒的別人的，延長MySQL的連接時間

#查詢連接的時間

show global variables like 'wait_timeout';

#修改連接的時間
set global wait_timeout=604800;