MySQL数据库连接8小时问题怎么解决?报错

下面是我的报错信息：

com.jfinal.plugin.activerecord.ActiveRecordException: com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure

The last packet successfully received from the server was 10,894 milliseconds ago.  The last packet sent successfully to the server was 2,118 milliseconds ago.

at com.jfinal.plugin.activerecord.Model.find(Model.java:565)

at com.jfinal.plugin.activerecord.Model.findFirst(Model.java:594)

at model.dao.Order.findOrderDetail(Order.java:157)

at controller.mobile.OrderController.findOrderById(OrderController.java:361)

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

at java.lang.reflect.Method.invoke(Method.java:606)

at com.jfinal.aop.Invocation.invoke(Invocation.java:73)

at other.interceptor.GlobalActionInterceptor.intercept(GlobalActionInterceptor.java:19)

at com.jfinal.aop.Invocation.invoke(Invocation.java:67)

at com.jfinal.core.ActionHandler.handle(ActionHandler.java:74)

at com.jfinal.core.JFinalFilter.doFilter(JFinalFilter.java:72)

at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)

at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)

at demo1.Kuayu.doFilter(Kuayu.java:43)

at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)

at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)

at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)

at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)

at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)

at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)

at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)

at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:953)

at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)

at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)

at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1023)

at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589)

at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:310)

at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)

at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)

at java.lang.Thread.run(Thread.java:745)

Caused by: com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure

The last packet successfully received from the server was 10,894 milliseconds ago.  The last packet sent successfully to the server was 2,118 milliseconds ago.

at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)

at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)

at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)

at java.lang.reflect.Constructor.newInstance(Constructor.java:526)

at com.mysql.jdbc.Util.handleNewInstance(Util.java:409)

at com.mysql.jdbc.SQLError.createCommunicationsException(SQLError.java:1127)

at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:3715)

at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:3604)

at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:4155)

at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:2615)

at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2776)

at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2838)

at com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:2082)

at com.mysql.jdbc.PreparedStatement.executeQuery(PreparedStatement.java:2212)

at com.mchange.v2.c3p0.impl.NewProxyPreparedStatement.executeQuery(NewProxyPreparedStatement.java:76)

at com.jfinal.plugin.activerecord.Model.find(Model.java:546)

at com.jfinal.plugin.activerecord.Model.find(Model.java:563)

... 31 more

Caused by: java.net.SocketException: Connection reset

at java.net.SocketInputStream.read(SocketInputStream.java:196)

at java.net.SocketInputStream.read(SocketInputStream.java:122)

at com.mysql.jdbc.util.ReadAheadInputStream.fill(ReadAheadInputStream.java:112)

at com.mysql.jdbc.util.ReadAheadInputStream.readFromUnderlyingStreamIfNecessary(ReadAheadInputStream.java:159)

at com.mysql.jdbc.util.ReadAheadInputStream.read(ReadAheadInputStream.java:187)

at com.mysql.jdbc.MysqlIO.readFully(MysqlIO.java:3158)

at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:3615)

... 41 more