【异常原因】：max_allowed_packet设置太小可能报如下两种异常：
异常一：ERROR 2006 (HY000) at line 192: MySQL server has gone away.
异常二：ERROR 1153 (08S01) at line 150: Got a packet bigger than ‘max_allowed_packet’ bytes.
【解决方法】：
[root@JD ~]# vi /etc/my.cnf
添加如下配置：
[mysqld]
max_allowed_packet=32M
重启服务即可：
[root@JD ~]# service mysqld restart
Stopping mysqld: [ OK ]
Starting mysqld: [ OK ]
[root@JD ~]#
