The last packet sent successfully to the server was 0 milliseconds ago. 若依修改，redis中的主机忘记修改

The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.
  at com.mysql.cj.jdbc.exceptions.SQLError.createCommunicationsException(SQLError.java:175)
  at com.mysql.cj.jdbc.exceptions.SQLExceptionsMapping.translateException(SQLExceptionsMapping.java:64)
  at com.mysql.cj.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:825)
  at com.mysql.cj.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:446)
  at com.mysql.cj.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:239)
  at com.mysql.cj.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:188)
  at com.alibaba.druid.filter.FilterChainImpl.connection_connect(FilterChainImpl.java:118)
  at com.alibaba.druid.filter.stat.StatFilter.connection_connect(StatFilter.java:232)
  at com.alibaba.druid.filter.FilterChainImpl.connection_connect(FilterChainImpl.java:112)
  at com.alibaba.druid.pool.DruidAbstractDataSource.createPhysicalConnection(DruidAbstractDataSource.java:1706)
  at com.alibaba.druid.pool.DruidAbstractDataSource.createPhysicalConnection(DruidAbstractDataSource.java:1801)
  at com.alibaba.druid.pool.DruidDataSource.init(DruidDataSource.java:938)
  at com.alibaba.druid.pool.DruidDataSource.getConnection(DruidDataSource.java:1462)
  at com.alibaba.druid.pool.DruidDataSource.getConnection(DruidDataSource.java:1458)
  at com.alibaba.druid.pool.DruidDataSource.getConnection(DruidDataSource.java:83)
  at org.springframework.jdbc.datasource.lookup.AbstractRoutingDataSource.getConnection(AbstractRoutingDataSource.java:194)
  at org.springframework.jdbc.datasource.DataSourceUtils.fetchConnection(DataSourceUtils.java:159)
  at org.springframework.jdbc.datasource.DataSourceUtils.doGetConnection(DataSourceUtils.java:117)
  at org.springframework.jdbc.datasource.DataSourceUtils.getConnection(DataSourceUtils.java:80)
  at org.mybatis.spring.transaction.SpringManagedTransaction.openConnection(SpringManagedTransaction.java:80)
  at org.mybatis.spring.transaction.SpringManagedTransaction.getConnection(SpringManagedTransaction.java:67)
  at org.apache.ibatis.executor.BaseExecutor.getConnection(BaseExecutor.java:345)
  at org.apache.ibatis.executor.SimpleExecutor.prepareStatement(SimpleExecutor.java:89)
  at org.apache.ibatis.executor.SimpleExecutor.doQuery(SimpleExecutor.java:64)
  at org.apache.ibatis.executor.BaseExecutor.queryFromDatabase(BaseExecutor.java:333)
  at org.apache.ibatis.executor.BaseExecutor.query(BaseExecutor.java:158)
  at org.apache.ibatis.executor.CachingExecutor.query(CachingExecutor.java:110)
  at org.apache.ibatis.executor.CachingExecutor.query(CachingExecutor.java:90)
  at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:154)
  at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:147)
  at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:142)
  at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
  at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
  at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
  at java.base/java.lang.reflect.Method.invoke(Method.java:566)
  at org.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:425)
  at com.sun.proxy.$Proxy105.selectList(Unknown Source)
  at org.mybatis.spring.SqlSessionTemplate.selectList(SqlSessionTemplate.java:224)
  at org.apache.ibatis.binding.MapperMethod.executeForMany(MapperMethod.java:147)
  at org.apache.ibatis.binding.MapperMethod.execute(MapperMethod.java:80)
  at org.apache.ibatis.binding.MapperProxy$PlainMethodInvoker.invoke(MapperProxy.java:142)
  at org.apache.ibatis.binding.MapperProxy.invoke(MapperProxy.java:86)
  at com.sun.proxy.$Proxy106.selectConfigList(Unknown Source)
  at com.ruoyi.system.service.impl.SysConfigServiceImpl.loadingConfigCache(SysConfigServiceImpl.java:177)
  at com.ruoyi.system.service.impl.SysConfigServiceImpl.init(SysConfigServiceImpl.java:40)
  at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
  at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
  at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
  at java.base/java.lang.reflect.Method.invoke(Method.java:566)
  at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor$LifecycleElement.invoke(InitDestroyAnnotationBeanPostProcessor.java:389)
  at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor$LifecycleMetadata.invokeInitMethods(InitDestroyAnnotationBeanPostProcessor.java:333)
  at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor.postProcessBeforeInitialization(InitDestroyAnnotationBeanPostProcessor.java:157)
  at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyBeanPostProcessorsBeforeInitialization(AbstractAutowireCapableBeanFactory.java:440)
  at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1796)
  at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:620)
  at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:542)
  at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:335)
  at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234)
  at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:333)
  at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:208)
  at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:276)
  at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1391)
  at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1311)
  at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.resolveFieldValue(AutowiredAnnotationBeanPostProcessor.java:657)
  at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:640)
  at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:119)
  at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessProperties(AutowiredAnnotationBeanPostProcessor.java:399)
  at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1431)
  at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:619)
  at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:542)
  at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:335)
  at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234)
  at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:333)
  at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:208)
  at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:955)
  at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:920)
  at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:583)
  at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:145)
  at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:780)
  at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:453)
  at org.springframework.boot.SpringApplication.run(SpringApplication.java:343)
  at org.springframework.boot.SpringApplication.run(SpringApplication.java:1370)
  at org.springframework.boot.SpringApplication.run(SpringApplication.java:1359)
  at com.ruoyi.RuoYiApplication.main(RuoYiApplication.java:18)
  at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
  at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
  at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
  at java.base/java.lang.reflect.Method.invoke(Method.java:566)
  at org.springframework.boot.devtools.restart.RestartLauncher.run(RestartLauncher.java:49)
Caused by: com.mysql.cj.exceptions.CJCommunicationsException: Communications link failure