The last packet sent successfully to the server was 0 milliseconds ago. The
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异常”The last packet sent successfully to the server was 0 milliseconds ago.“的原因
1.是由于数据库回收了连接，而系统的缓冲池不知道，继续使用被回收的连接所致的。
2.服务器断网
解决办法
第一种情况，将mysql回收空闲连接的时间变长，mysql默认回收时间是8小时，可以在mysql目录下的my.ini中增加下面配置，将时间改为1天或者可以通过配置，让缓冲池去测试
连接是否被回收，如果被回收，则不继续使用。
断网不用说了。。。
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