mysqlhibernatefailure
自己做的第一个信息类网站，第一次访问主页时能够正确显示，但过几分钟后刷新该页面是就会报错：错误类型如下：
com.mysql.jdbc.exceptions.jdbc4.communicationsexception: communications link failure
the last packet successfully received from the server was 1,649,969 milliseconds ago. the last packet sent successfully to the server was 2 milliseconds ago
.
sun.reflect.nativeconstructoraccessorimpl.newinstance0(native method)
sun.reflect.nativeconstructoraccessorimpl.newinstance(nativeconstructoraccessorimpl.java:39)
sun.reflect.delegatingconstructoraccessorimpl.newinstance(delegatingconstructoraccessorimpl.java:27)
java.lang.reflect.constructor.newinstance(constructor.java:513)
com.mysql.jdbc.util.handlenewinstance(util.java:409)
com.mysql.jdbc.sqlerror.createcommunicationsexception(sqlerror.java:1127)
com.mysql.jdbc.mysqlio.reuseandreadpacket(mysqlio.java:3715)
在网上查了一些解决方案，比如设置mysql参数“wait_timeout”等等都不奏效。求大神指点。。（ps: 用的是hibernate访问数据库，mysql版本为5.6的）