The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server. （关于jdbc）

The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.

今天操作数据库较大数据库访问量的时候出现问题，大致是数据库连接缓冲池的问题，弄了半天的mysql （ubuntu）。

解决办法：
（1）使用JDBC URL中使用autoReconnect属性，url添加

&autoReconnect=true&failOverReadOnly=false
例如：

String URL = "jdbc:mysql://localhost:3306/mxManage&autoReconnect=true&failOverReadOnly=false";

（2） 修改MySQL的参数. /etc/my.cnf 添加

[mysqld]
wait_timeout=31536000
interactive_timeout=31536000

（3）重启mysql

service mysql restart

原因分析：
（1）大量数据访问情况下，mysql connection连接有可能失效
（2）长时间不妨问，connection会失效

The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server. （关于jdbc）

原文：http://www.cnblogs.com/timelesszhuang/p/4189760.html