参考文章：https://stackoverflow.com/questions/7942154/mysql-error-2006-mysql-server-has-gone-away
cat /etc/my.cnf
sudo vim /etc/my.cnf
max_allowed_packet=500M
wait_timeout = 28800
# 8 hours
interactive_timeout = 28800
重启
sudo service mysqld restart
参考文章：https://stackoverflow.com/questions/7942154/mysql-error-2006-mysql-server-has-gone-away
cat /etc/my.cnf
sudo vim /etc/my.cnf
max_allowed_packet=500M
wait_timeout = 28800
# 8 hours
interactive_timeout = 28800
重启
sudo service mysqld restart