爲什麼在JHipster中創建Spring Bean時出現錯誤？

我剛剛使用yo jhipster在新機器上創建了一個項目，並且在運行npm install，bower install等之後，它提供了一些例外。它似乎無法訪問mysql數據庫，但我還沒有對它進行任何更改，所以沒有理由不應該工作，因爲它應該是開箱即用的。任何人都知道解決這個問題？爲什麼在JHipster中創建Spring Bean時出現錯誤？

錯誤：

[DEBUG] io.github.jhipster.loaded.instrument.JHipsterLoadtimeInstrumentationPlugin - Patch - Clear cache org.springframework.core.LocalVariableTableParameterNameDiscoverer 
[INFO] com.comcast.castit.Application - Starting Application on HQSWL-C006246 with PID 5872 (C:\CastIT\target\classes started by sparri202 in C:\CastIT) 
[DEBUG] com.comcast.castit.Application - Running with Spring Boot v1.1.7.RELEASE, Spring v4.0.7.RELEASE 
[DEBUG] io.github.jhipster.loaded.instrument.JHipsterLoadtimeInstrumentationPlugin - Patch - Rewrite org.springframework.aop.framework.AdvisedSupport.getInterceptorsAndDynamicInterceptionAdvice() method 
[DEBUG] org.jboss.logging - Logging Provider: org.jboss.logging.Slf4jLoggerProvider 
[DEBUG] com.comcast.castit.config.AsyncConfiguration - Creating Async Task Executor 
[DEBUG] io.github.jhipster.loaded.instrument.JHipsterLoadtimeInstrumentationPlugin - Patch - Rewrite org.hibernate.jpa.HibernatePersistenceProvider.createContainerEntityManagerFactory() method 
[DEBUG] io.github.jhipster.loaded.instrument.JHipsterLoadtimeInstrumentationPlugin - Patch - Rewrite org.springframework.security.access.method.DelegatingMethodSecurityMetadataSource.getAttributes() method 
[DEBUG] com.comcast.castit.config.DatabaseConfiguration - Configuring Datasource 
[DEBUG] com.comcast.castit.config.DatabaseConfiguration - Configuring Liquibase 
[DEBUG] io.github.jhipster.loaded.instrument.JHipsterLoadtimeInstrumentationPlugin - Patch - Rewrite liquibase.ext.hibernate.snapshot.TableSnapshotGenerator.snapshotObject() method 
[WARN] org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext - Exception encountered during context initialization - cancelling refresh attempt 
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'com.ryantenney.metrics.spring.config.annotation.DelegatingMetricsConfiguration': BeanPostProcessor before instantiation of bean failed; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.springframework.cache.annotation.ProxyCachingConfiguration': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private java.util.Collection org.springframework.cache.annotation.AbstractCachingConfiguration.cacheManagerBeans; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'cacheConfiguration': Injection of persistence dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'liquibase' defined in class path resource [com/comcast/castit/config/DatabaseConfiguration.class]: Invocation of init method failed; nested exception is liquibase.exception.DatabaseException: java.sql.SQLException: Timeout of 30000ms encountered waiting for connection. 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:471) ~[spring-beans-4.0.7.RELEASE.jar:4.0.7.RELEASE] 
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:302) ~[spring-beans-4.0.7.RELEASE.jar:4.0.7.RELEASE] 
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:228) ~[spring-beans-4.0.7.RELEASE.jar:4.0.7.RELEASE] 
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:298) ~[spring-beans-4.0.7.RELEASE.jar:4.0.7.RELEASE] 
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:193) ~[spring-beans-4.0.7.RELEASE.jar:4.0.7.RELEASE] 
    at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:370) ~[spring-beans-4.0.7.RELEASE.jar:4.0.7.RELEASE] 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1095) ~[spring-beans-4.0.7.RELEASE.jar:4.0.7.RELEASE] 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:990) ~[spring-beans-4.0.7.RELEASE.jar:4.0.7.RELEASE] 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:504) ~[spring-beans-4.0.7.RELEASE.jar:4.0.7.RELEASE] 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:475) ~[spring-beans-4.0.7.RELEASE.jar:4.0.7.RELEASE] 
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:302) ~[spring-beans-4.0.7.RELEASE.jar:4.0.7.RELEASE] 
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:228) ~[spring-beans-4.0.7.RELEASE.jar:4.0.7.RELEASE] 
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:298) ~[spring-beans-4.0.7.RELEASE.jar:4.0.7.RELEASE] 
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:198) ~[spring-beans-4.0.7.RELEASE.jar:4.0.7.RELEASE] 
    at org.springframework.context.support.PostProcessorRegistrationDelegate.registerBeanPostProcessors(PostProcessorRegistrationDelegate.java:232) ~[spring-context-4.0.7.RELEASE.jar:4.0.7.RELEASE] 
    at org.springframework.context.support.AbstractApplicationContext.registerBeanPostProcessors(AbstractApplicationContext.java:620) ~[spring-context-4.0.7.RELEASE.jar:4.0.7.RELEASE] 
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:467) ~[spring-context-4.0.7.RELEASE.jar:4.0.7.RELEASE] 
    at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh(EmbeddedWebApplicationContext.java:109) [spring-boot-1.1.7.RELEASE.jar:1.1.7.RELEASE] 
    at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:691) [spring-boot-1.1.7.RELEASE.jar:1.1.7.RELEASE] 
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:320) [spring-boot-1.1.7.RELEASE.jar:1.1.7.RELEASE] 
    at com.comcast.castit.Application.main(Application.java:59) [classes/:na] 
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.springframework.cache.annotation.ProxyCachingConfiguration': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private java.util.Collection org.springframework.cache.annotation.AbstractCachingConfiguration.cacheManagerBeans; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'cacheConfiguration': Injection of persistence dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'liquibase' defined in class path resource [com/comcast/castit/config/DatabaseConfiguration.class]: Invocation of init method failed; nested exception is liquibase.exception.DatabaseException: java.sql.SQLException: Timeout of 30000ms encountered waiting for connection. 
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:293) ~[spring-beans-4.0.7.RELEASE.jar:4.0.7.RELEASE] 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1186) ~[spring-beans-4.0.7.RELEASE.jar:4.0.7.RELEASE] 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:537) ~[spring-beans-4.0.7.RELEASE.jar:4.0.7.RELEASE] 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:475) ~[spring-beans-4.0.7.RELEASE.jar:4.0.7.RELEASE] 
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:302) ~[spring-beans-4.0.7.RELEASE.jar:4.0.7.RELEASE] 
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:228) ~[spring-beans-4.0.7.RELEASE.jar:4.0.7.RELEASE] 
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:298) ~[spring-beans-4.0.7.RELEASE.jar:4.0.7.RELEASE] 
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:193) ~[spring-beans-4.0.7.RELEASE.jar:4.0.7.RELEASE] 
    at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:370) ~[spring-beans-4.0.7.RELEASE.jar:4.0.7.RELEASE] 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1095) ~[spring-beans-4.0.7.RELEASE.jar:4.0.7.RELEASE] 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:990) ~[spring-beans-4.0.7.RELEASE.jar:4.0.7.RELEASE] 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:504) ~[spring-beans-4.0.7.RELEASE.jar:4.0.7.RELEASE] 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:475) ~[spring-beans-4.0.7.RELEASE.jar:4.0.7.RELEASE] 
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:302) ~[spring-beans-4.0.7.RELEASE.jar:4.0.7.RELEASE] 
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:228) ~[spring-beans-4.0.7.RELEASE.jar:4.0.7.RELEASE] 
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:298) ~[spring-beans-4.0.7.RELEASE.jar:4.0.7.RELEASE] 
    at org.springframework.aop.framework.autoproxy.AbstractAdvisorAutoProxyCreator.findCandidateAdvisors(AbstractAdvisorAutoProxyCreator.java:101) ~[spring-aop-4.0.7.RELEASE.jar:4.0.7.RELEASE] 
    at org.springframework.aop.aspectj.annotation.AnnotationAwareAspectJAutoProxyCreator.findCandidateAdvisors(AnnotationAwareAspectJAutoProxyCreator.java:85) ~[spring-aop-4.0.7.RELEASE.jar:4.0.7.RELEASE] 
    at org.springframework.aop.aspectj.autoproxy.AspectJAwareAdvisorAutoProxyCreator.shouldSkip(AspectJAwareAdvisorAutoProxyCreator.java:103) ~[spring-aop-4.0.7.RELEASE.jar:4.0.7.RELEASE] 
    at org.springframework.aop.framework.autoproxy.AbstractAutoProxyCreator.postProcessBeforeInstantiation(AbstractAutoProxyCreator.java:289) ~[spring-aop-4.0.7.RELEASE.jar:4.0.7.RELEASE] 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyBeanPostProcessorsBeforeInstantiation(AbstractAutowireCapableBeanFactory.java:959) ~[spring-beans-4.0.7.RELEASE.jar:4.0.7.RELEASE] 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.resolveBeforeInstantiation(AbstractAutowireCapableBeanFactory.java:931) ~[spring-beans-4.0.7.RELEASE.jar:4.0.7.RELEASE] 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:465) ~[spring-beans-4.0.7.RELEASE.jar:4.0.7.RELEASE] 
    ... 20 common frames omitted 
Caused by: org.springframework.beans.factory.BeanCreationException: Could not autowire field: private java.util.Collection org.springframework.cache.annotation.AbstractCachingConfiguration.cacheManagerBeans; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'cacheConfiguration': Injection of persistence dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'liquibase' defined in class path resource [com/comcast/castit/config/DatabaseConfiguration.class]: Invocation of init method failed; nested exception is liquibase.exception.DatabaseException: java.sql.SQLException: Timeout of 30000ms encountered waiting for connection. 
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:509) ~[spring-beans-4.0.7.RELEASE.jar:4.0.7.RELEASE] 
    at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:87) ~[spring-beans-4.0.7.RELEASE.jar:4.0.7.RELEASE] 
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:290) ~[spring-beans-4.0.7.RELEASE.jar:4.0.7.RELEASE] 
    ... 44 common frames omitted 
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'cacheConfiguration': Injection of persistence dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'liquibase' defined in class path resource [com/comcast/castit/config/DatabaseConfiguration.class]: Invocation of init method failed; nested exception is liquibase.exception.DatabaseException: java.sql.SQLException: Timeout of 30000ms encountered waiting for connection. 
    at org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor.postProcessPropertyValues(PersistenceAnnotationBeanPostProcessor.java:356) ~[spring-orm-4.0.7.RELEASE.jar:4.0.7.RELEASE] 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1186) ~[spring-beans-4.0.7.RELEASE.jar:4.0.7.RELEASE] 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:537) ~[spring-beans-4.0.7.RELEASE.jar:4.0.7.RELEASE] 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:475) ~[spring-beans-4.0.7.RELEASE.jar:4.0.7.RELEASE] 
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:302) ~[spring-beans-4.0.7.RELEASE.jar:4.0.7.RELEASE] 
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:228) ~[spring-beans-4.0.7.RELEASE.jar:4.0.7.RELEASE] 
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:298) ~[spring-beans-4.0.7.RELEASE.jar:4.0.7.RELEASE] 
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:193) ~[spring-beans-4.0.7.RELEASE.jar:4.0.7.RELEASE] 
    at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:370) ~[spring-beans-4.0.7.RELEASE.jar:4.0.7.RELEASE] 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1095) ~[spring-beans-4.0.7.RELEASE.jar:4.0.7.RELEASE] 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:990) ~[spring-beans-4.0.7.RELEASE.jar:4.0.7.RELEASE] 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:504) ~[spring-beans-4.0.7.RELEASE.jar:4.0.7.RELEASE] 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:475) ~[spring-beans-4.0.7.RELEASE.jar:4.0.7.RELEASE] 
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:302) ~[spring-beans-4.0.7.RELEASE.jar:4.0.7.RELEASE] 
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:228) ~[spring-beans-4.0.7.RELEASE.jar:4.0.7.RELEASE] 
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:298) ~[spring-beans-4.0.7.RELEASE.jar:4.0.7.RELEASE] 
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:193) ~[spring-beans-4.0.7.RELEASE.jar:4.0.7.RELEASE] 
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.findAutowireCandidates(DefaultListableBeanFactory.java:1021) ~[spring-beans-4.0.7.RELEASE.jar:4.0.7.RELEASE] 
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:916) ~[spring-beans-4.0.7.RELEASE.jar:4.0.7.RELEASE] 
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:862) ~[spring-beans-4.0.7.RELEASE.jar:4.0.7.RELEASE] 
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:481) ~[spring-beans-4.0.7.RELEASE.jar:4.0.7.RELEASE] 
    ... 46 common frames omitted 
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'liquibase' defined in class path resource [com/comcast/castit/config/DatabaseConfiguration.class]: Invocation of init method failed; nested exception is liquibase.exception.DatabaseException: java.sql.SQLException: Timeout of 30000ms encountered waiting for connection. 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1554) ~[spring-beans-4.0.7.RELEASE.jar:4.0.7.RELEASE] 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:539) ~[spring-beans-4.0.7.RELEASE.jar:4.0.7.RELEASE] 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:475) ~[spring-beans-4.0.7.RELEASE.jar:4.0.7.RELEASE] 
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:302) ~[spring-beans-4.0.7.RELEASE.jar:4.0.7.RELEASE] 
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:228) ~[spring-beans-4.0.7.RELEASE.jar:4.0.7.RELEASE] 
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:298) ~[spring-beans-4.0.7.RELEASE.jar:4.0.7.RELEASE] 
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:193) ~[spring-beans-4.0.7.RELEASE.jar:4.0.7.RELEASE] 
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:292) ~[spring-beans-4.0.7.RELEASE.jar:4.0.7.RELEASE] 
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:193) ~[spring-beans-4.0.7.RELEASE.jar:4.0.7.RELEASE] 
    at org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor.findDefaultEntityManagerFactory(PersistenceAnnotationBeanPostProcessor.java:549) ~[spring-orm-4.0.7.RELEASE.jar:4.0.7.RELEASE] 
    at org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor.findEntityManagerFactory(PersistenceAnnotationBeanPostProcessor.java:515) ~[spring-orm-4.0.7.RELEASE.jar:4.0.7.RELEASE] 
    at org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor$PersistenceElement.resolveEntityManager(PersistenceAnnotationBeanPostProcessor.java:682) ~[spring-orm-4.0.7.RELEASE.jar:4.0.7.RELEASE] 
    at org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor$PersistenceElement.getResourceToInject(PersistenceAnnotationBeanPostProcessor.java:655) ~[spring-orm-4.0.7.RELEASE.jar:4.0.7.RELEASE] 
    at org.springframework.beans.factory.annotation.InjectionMetadata$InjectedElement.inject(InjectionMetadata.java:155) ~[spring-beans-4.0.7.RELEASE.jar:4.0.7.RELEASE] 
    at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:87) ~[spring-beans-4.0.7.RELEASE.jar:4.0.7.RELEASE] 
    at org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor.postProcessPropertyValues(PersistenceAnnotationBeanPostProcessor.java:353) ~[spring-orm-4.0.7.RELEASE.jar:4.0.7.RELEASE] 
    ... 66 common frames omitted 
Caused by: liquibase.exception.DatabaseException: java.sql.SQLException: Timeout of 30000ms encountered waiting for connection. 
    at liquibase.integration.spring.SpringLiquibase.afterPropertiesSet(SpringLiquibase.java:301) ~[liquibase-core-3.1.1.jar:na] 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1613) ~[spring-beans-4.0.7.RELEASE.jar:4.0.7.RELEASE] 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1550) ~[spring-beans-4.0.7.RELEASE.jar:4.0.7.RELEASE] 
    ... 81 common frames omitted 
Caused by: java.sql.SQLException: Timeout of 30000ms encountered waiting for connection. 
    at com.zaxxer.hikari.pool.HikariPool.getConnection(HikariPool.java:192) ~[HikariCP-1.4.0.jar:na] 
    at com.zaxxer.hikari.HikariDataSource.getConnection(HikariDataSource.java:91) ~[HikariCP-1.4.0.jar:na] 
    at liquibase.integration.spring.SpringLiquibase.afterPropertiesSet(SpringLiquibase.java:296) ~[liquibase-core-3.1.1.jar:na] 
    ... 83 common frames omitted 
Caused by: com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure 

The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server. 
    at sun.reflect.GeneratedConstructorAccessor32.newInstance(Unknown Source) ~[na:na] 
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source) ~[na:1.7.0_60] 
    at java.lang.reflect.Constructor.newInstance(Unknown Source) ~[na:1.7.0_60] 
    at org.springsource.loaded.ri.ReflectiveInterceptor.jlrConstructorNewInstance(ReflectiveInterceptor.java:1002) ~[springloaded-1.2.0.RELEASE.jar:1.2.0.RELEASE] 
    at com.mysql.jdbc.Util.handleNewInstance(Util.java:408) ~[mysql-connector-java-5.1.32.jar:na] 
    at com.mysql.jdbc.SQLError.createCommunicationsException(SQLError.java:1137) ~[mysql-connector-java-5.1.32.jar:na] 
    at com.mysql.jdbc.MysqlIO.<init>(MysqlIO.java:355) ~[mysql-connector-java-5.1.32.jar:na] 
    at com.mysql.jdbc.ConnectionImpl.coreConnect(ConnectionImpl.java:2490) ~[mysql-connector-java-5.1.32.jar:na] 
    at com.mysql.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:2527) ~[mysql-connector-java-5.1.32.jar:na] 
    at com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2309) ~[mysql-connector-java-5.1.32.jar:na] 
    at com.mysql.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:834) ~[mysql-connector-java-5.1.32.jar:na] 
    at com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:46) ~[mysql-connector-java-5.1.32.jar:na] 
    at sun.reflect.GeneratedConstructorAccessor28.newInstance(Unknown Source) ~[na:na] 
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source) ~[na:1.7.0_60] 
    at java.lang.reflect.Constructor.newInstance(Unknown Source) ~[na:1.7.0_60] 
    at org.springsource.loaded.ri.ReflectiveInterceptor.jlrConstructorNewInstance(ReflectiveInterceptor.java:1002) ~[springloaded-1.2.0.RELEASE.jar:1.2.0.RELEASE] 
    at com.mysql.jdbc.Util.handleNewInstance(Util.java:408) ~[mysql-connector-java-5.1.32.jar:na] 
    at com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:419) ~[mysql-connector-java-5.1.32.jar:na] 
    at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:344) ~[mysql-connector-java-5.1.32.jar:na] 
    at com.mysql.jdbc.jdbc2.optional.MysqlDataSource.getConnection(MysqlDataSource.java:441) ~[mysql-connector-java-5.1.32.jar:na] 
    at com.mysql.jdbc.jdbc2.optional.MysqlDataSource.getConnection(MysqlDataSource.java:139) ~[mysql-connector-java-5.1.32.jar:na] 
    at com.mysql.jdbc.jdbc2.optional.MysqlDataSource.getConnection(MysqlDataSource.java:109) ~[mysql-connector-java-5.1.32.jar:na] 
    at com.zaxxer.hikari.pool.HikariPool.addConnection(HikariPool.java:378) ~[HikariCP-1.4.0.jar:na] 
    at com.zaxxer.hikari.pool.HikariPool.access$400(HikariPool.java:61) ~[HikariCP-1.4.0.jar:na] 
    at com.zaxxer.hikari.pool.HikariPool$1AddConnection.run(HikariPool.java:302) ~[HikariCP-1.4.0.jar:na] 
... 
    Caused by: java.net.ConnectException: Connection refused: connect 
... 
     at com.mysql.jdbc.StandardSocketFactory.connect(StandardSocketFactory.java:258) ~[mysql-connector-java-5.1.32.jar:na] 
     at com.mysql.jdbc.MysqlIO.<init>(MysqlIO.java:305) ~[mysql-connector-java-5.1.32.jar:na] 
     ... 23 common frames omitted 
    [ERROR] org.springframework.boot.SpringApplication - Application startup failed 
    org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'com.ryantenney.metrics.spring.config.annotation.DelegatingMetricsConfiguration': BeanPostProcessor before instantiation of bean failed; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.springframework.cache.annotation.ProxyCachingConfiguration': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private java.util.Collection org.springframework.cache.annotation.AbstractCachingConfiguration.cacheManagerBeans; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'cacheConfiguration': Injection of persistence dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'liquibase' defined in class path resource [com/comcast/castit/config/DatabaseConfiguration.class]: Invocation of init method failed; nested exception is liquibase.exception.DatabaseException: java.sql.SQLException: Timeout of 30000ms encountered waiting for connection. 
     at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:471) ~[spring-beans-4.0.7.RELEASE.jar:4.0.7.RELEASE] 
     at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:302) ~[spring-beans-4.0.7.RELEASE.jar:4.0.7.RELEASE]...

還有更精彩的，但我有個字符的數量有限。相關代碼：（應用dev.yml）

server: 
    port: 8080 

spring: 
    profiles: dev 

    datasource: 
     dataSourceClassName: com.mysql.jdbc.jdbc2.optional.MysqlDataSource 
     url: jdbc:mysql://localhost:3306/CastIT 
     databaseName: 
     serverName: 
     username: root 
     password: 
     cachePrepStmts: true 
     prepStmtCacheSize: 250 
     prepStmtCacheSqlLimit: 2048 
     useServerPrepStmts: true 

    jpa: 
     database-platform: org.hibernate.dialect.MySQLInnoDBDialect 
     database: MYSQL 
     openInView: false 
     show_sql: true 
     generate-ddl: false 
     hibernate: 
      ddl-auto: none 
      naming-strategy: org.hibernate.cfg.EJB3NamingStrategy 
     properties: 
      hibernate.cache.use_second_level_cache: true 
      hibernate.cache.use_query_cache: false 
      hibernate.generate_statistics: true 
      hibernate.cache.region.factory_class: org.hibernate.cache.ehcache.SingletonEhCacheRegionFactory 

    mail: 
     baseUrl: http://localhost:8080 

    thymeleaf: 
     mode: XHTML 
     cache: false 
     viewNames: error 

metrics: 
    jmx.enabled: true 
    graphite: 
     enabled: false 
     host: localhost 
     port: 2003 

cache: 
    timeToLiveSeconds: 3600 
    ehcache: 
     maxBytesLocalHeap: 16M 

# You can add as many as folders to watch 
# You just need to add a dash + the directory to watch 
hotReload: 
    enabled: true 
    package: 
     project: com.comcast.castit 
     domain: com.comcast.castit.domain 
     restdto: com.comcast.castit.web.rest.dto 
    liquibase: 
     defaultCatalogName: CastIT 
     defaultSchema: CastIT 
     excludeTables: T_AUTHORITY,T_PERSISTENT_AUDIT_EVENT,T_PERSISTENT_AUDIT_EVENT_DATA,T_PERSISTENT_TOKEN,T_USER,T_USER_AUTHORITY 
    watchdir: 
     - target/classes

來源

2014-10-06 Built In Parris

「由於：java.net.ConnectException：連接被拒絕：連接」您的數據庫用戶名和密碼真的是'root'，''？ – 2014-10-06 21:31:35

由於異常說：

Caused by: java.net.ConnectException: Connection refused: connect

這是因爲你的MySQL連接未打開。也許它沒有運行。也許YAML文件中的參數不正確：你有一個「CastIT」數據庫嗎？用戶可以「root」訪問它，而無需密碼？你可以嘗試連接MySQL工作臺。

來源

2014-10-06 23:14:37

我對JHipster的功能感到困惑，因爲它讓它看起來好像它天生就創建了一個數據庫，當時它只是建立一個放置其中的架構。對於那些有類似誤解的人，可以使用XAMPP來設置數據庫並路由連接。謝謝，朱利安。 – 2014-10-07 14:13:36

如果您使用MysqlDataSource，則您指定的參數可能被忽略。 url通常用於基於驅動程序（驅動程序類）的配置。嘗試設置serverName和databaseName。

來源

2014-10-07 12:28:42 brettw

爲什麼在JHipster中創建Spring Bean時出現錯誤？

回答

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