在一定时间内不访问项目，再次访问就会出现一下异常，等待一会儿重新发送请求即可正常访问。本人猜测是数据源连接问题，长时间不访问数据源连接失效了，然后第一次访问就会出现这个问题，然后等待数据源重新连接成功，就可以访问了。这是我猜测的原因，也不敢确定是不是这个原因。

有知道怎么解决的没？

2019-12-11 16:56:37  [ http-nio-8080-exec-1:417362 ] - [ DEBUG ]  close statement error

java.sql.SQLRecoverableException: 关闭的连接

at oracle.jdbc.driver.PhysicalConnection.needLine(PhysicalConnection.java:5416)

at oracle.jdbc.driver.OracleStatement.closeOrCache(OracleStatement.java:1585)

at oracle.jdbc.driver.OracleStatement.close(OracleStatement.java:1570)

at oracle.jdbc.driver.OracleStatementWrapper.close(OracleStatementWrapper.java:94)

at com.alibaba.druid.util.JdbcUtils.close(JdbcUtils.java:96)

at com.alibaba.druid.pool.vendor.OracleValidConnectionChecker.isValidConnection(OracleValidConnectionChecker.java:88)

at com.alibaba.druid.pool.DruidAbstractDataSource.testConnectionInternal(DruidAbstractDataSource.java:1335)

at com.alibaba.druid.pool.DruidDataSource.getConnectionDirect(DruidDataSource.java:1099)

at com.alibaba.druid.pool.DruidDataSource.getConnection(DruidDataSource.java:1066)

at com.alibaba.druid.pool.DruidDataSource.getConnection(DruidDataSource.java:1056)

at com.alibaba.druid.pool.DruidDataSource.getConnection(DruidDataSource.java:104)

at com.jfinal.plugin.activerecord.Config.getConnection(Config.java:203)

at com.jfinal.plugin.activerecord.Model.find(Model.java:687)

at com.jfinal.plugin.activerecord.Model.find(Model.java:703)

at com.zrhis.system.model.XtglSectionHospital.queryOneSection(XtglSectionHospital.java:104)

at com.zrhis.systrm.service.RegistryListService.queryOneSection(RegistryListService.java:84)

at com.zrhis.system.controller.RegistryListController.statisticsManager(RegistryListController.java:87)

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

at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)

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

at java.lang.reflect.Method.invoke(Method.java:498)

at com.jfinal.aop.Invocation.invoke(Invocation.java:83)

at com.zrhis.system.interceptor.LoginInterceptor.intercept(LoginInterceptor.java:24)

at com.jfinal.aop.Invocation.invoke(Invocation.java:77)

at com.jfinal.core.ActionHandler.handle(ActionHandler.java:82)

at com.jfinal.core.JFinalFilter.doFilter(JFinalFilter.java:89)

at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192)

at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165)

at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:198)

at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)

at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:474)

at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140)

at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)

at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:624)

at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87)

at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:349)

at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:783)

at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)

at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:789)

at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1437)

at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)

at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)

at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)

at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)

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

2019-12-11 16:56:37  [ http-nio-8080-exec-1:417368 ] - [ DEBUG ]  skip not validate connection.

这是配置的DruidPlugin，其他相关属性并没有设置。