druid校验连接超过15分钟?报错

@yzChen233 你好，想跟你请教个问题：

老师您好：

        在用druid（1.1.5版本）作为impala的连接池过程中，发现连接长时间不用，等再次获取连接时校验连接是否有效花费了15分钟。

我的配置如下，testWhileIdle配置是true。看了druid的源码，发现报错的地方就是校验连接是否有效，我怀疑是connection已经断开，connection创建statement的时候耗时，请问老师是否有什么解决方案，希望得到您的回答，谢谢！

spring.datasource.initialSize=1
spring.datasource.minIdle=3
spring.datasource.maxActive=20
spring.datasource.maxWait=60000
spring.datasource.timeBetweenEvictionRunsMillis=60000
spring.datasource.minEvictableIdleTimeMillis=30000
spring.datasource.validationQuery=select 'x'
spring.datasource.testWhileIdle=true
spring.datasource.testOnBorrow=false
spring.datasource.testOnReturn=false
spring.datasource.poolPreparedStatements=true
spring.datasource.maxPoolPreparedStatementPerConnectionSize=20
spring.datasource.filters=stat,wall,slf4j
spring.datasource.connectionProperties=druid.stat.mergeSql=true;druid.stat.slowSqlMillis=5000

错误日志如下：

java.sql.SQLNonTransientConnectionException: [Simba][JDBC](10060) Connection has been closed.
        at com.cloudera.exceptions.ExceptionConverter.toSQLException(Unknown Source)
        at com.cloudera.jdbc.common.SConnection.closeConnection(Unknown Source)
        at com.cloudera.jdbc.common.SConnection.abortInternal(Unknown Source)
        at com.cloudera.jdbc.common.SConnection.close(Unknown Source)
        at com.alibaba.druid.util.JdbcUtils.close(JdbcUtils.java:73)
        at com.alibaba.druid.pool.DruidDataSource.discardConnection(DruidDataSource.java:1322)
        at com.alibaba.druid.pool.DruidDataSource.getConnectionDirect(DruidDataSource.java:1287)
        at com.alibaba.druid.pool.DruidDataSource.getConnection(DruidDataSource.java:1221)
        at com.alibaba.druid.pool.DruidDataSource.getConnection(DruidDataSource.java:1211)
        at com.alibaba.druid.pool.DruidDataSource.getConnection(DruidDataSource.java:105)
        at sun.reflect.GeneratedMethodAccessor132.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:497)
        at com.sinolife.sf.trace.JdbcTracePlugin.openConnection(JdbcTracePlugin.java:174)
        at com.sinolife.sf.framework.dbcontext.DbSessionContextPlugin$1.invoke(DbSessionContextPlugin.java:279)
        at com.sun.proxy.$Proxy141.getConnection(Unknown Source)
        at org.springframework.jdbc.datasource.DataSourceUtils.fetchConnection(DataSourceUtils.java:151)
        at org.springframework.jdbc.datasource.DataSourceUtils.doGetConnection(DataSourceUtils.java:115)
        at org.springframework.jdbc.datasource.DataSourceUtils.getConnection(DataSourceUtils.java:78)
        at org.springframework.jdbc.core.JdbcTemplate.execute(JdbcTemplate.java:371)
        at org.springframework.jdbc.core.JdbcTemplate.execute(JdbcTemplate.java:415)
        at com.fd.offline.impala.service.Impl.ImpalaDBServiceImpl.refresh(ImpalaDBServiceImpl.java:49)
        at com.fd.offline.service.impl.ImpalaServiceImpl.refresh(ImpalaServiceImpl.java:164)
        at com.fd.offline.controller.ImpalaController.refresh(ImpalaController.java:82)
        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:497)
        at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:343)
        at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:197)
        at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:749)
        at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:163)
        at org.springframework.aop.framework.adapter.MethodBeforeAdviceInterceptor.invoke(MethodBeforeAdviceInterceptor.java:52)
        at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:185)
        at org.springframework.aop.aspectj.MethodInvocationProceedingJoinPoint.proceed(MethodInvocationProceedingJoinPoint.java:88)
        at com.fd.common.aspect.WebLogAspect.doAround(WebLogAspect.java:59)
        at sun.reflect.GeneratedMethodAccessor320.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:497)
        at org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethodWithGivenArgs(AbstractAspectJAdvice.java:644)
        at org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethod(AbstractAspectJAdvice.java:633)
        at org.springframework.aop.aspectj.AspectJAroundAdvice.invoke(AspectJAroundAdvice.java:70)
        at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:185)
        at org.springframework.aop.framework.adapter.AfterReturningAdviceInterceptor.invoke(AfterReturningAdviceInterceptor.java:52)
        at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:185)
        at com.sinolife.sf.framework.controller.ControllerBrowserNoCacheMethodInterceptor.invoke(ControllerBrowserNoCacheMethodInterceptor.java:19)
        at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:185)
        at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:92)
        at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:185)