Tomcat部署多个Sring Boot项目时Unable To Register MBean Exception的一种解决方法

Tomcat部署多个Sring Boot项目时出现org.springframework.jmx.export.UnableToRegisterMBeanException: Unable to register MBean [HikariDataSource (HikariPool-2)] with key ‘dataSource’ 异常的解决方法
异常如下
org.apache.catalina.core.ContainerBase.addChildInternal ContainerBase.addChild: start:
org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[
Catalina].StandardHost[localhost].StandardContext[/dreamclock]]
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:167)
at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:754)
at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:730)
at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:734)
at org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:1140)
at org.apache.catalina.startup.HostConfigDeployDirectory.run(HostConfig.java:1875)atjava.base/java.util.concurrent.ExecutorsDeployDirectory.run(HostConfig.java:1875) at java.base/java.util.concurrent.ExecutorsDeployDirectory.run(HostConfig.java:1875)atjava.base/java.util.concurrent.ExecutorsRunnableAdapter.call(Executors.java:514)
at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1135)
at java.base/java.util.concurrent.ThreadPoolExecutorKaTeX parse error: Expected 'EOF', got '\MyTomcat' at position 245: …ned in file [H:\̲M̲y̲T̲o̲m̲c̲a̲t̲\tomcat\webapps…doGetBeanKaTeX parse error: Expected 'EOF', got '\MyTomcat' at position 1975: …ned in file [H:\̲M̲y̲T̲o̲m̲c̲a̲t̲\tomcat\webapps…doGetBean0(AbstractBeanFactory.java:320)atorg.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222)atorg.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:318)atorg.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199)atorg.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:277)atorg.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1244)atorg.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1164)atorg.springframework.beans.factory.support.ConstructorResolver.resolveAutowiredArgument(ConstructorResolver.java:857)atorg.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:760)...32moreCausedby:org.springframework.beans.factory.BeanCreationException:Errorcreatingbeanwithname′clockInRecordRepository′:Invocationofinitmethodfailed;nestedexceptionisjava.lang.IllegalArgumentException:Notamanagedtype:classcom.xiaomo.dreamclock.model.clockin.ClockInRecordatorg.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1745)atorg.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:576)atorg.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:498)atorg.springframework.beans.factory.support.AbstractBeanFactory.lambda0(AbstractBeanFactory.java:320) at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222) at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:318) at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199) at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:277) at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1244) at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1164) at org.springframework.beans.factory.support.ConstructorResolver.resolveAutowiredArgument(ConstructorResolver.java:857) at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:760) ... 32 more Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'clockInRecordRepository': Invocation of init method failed; nested exception is java.lang.IllegalArgumentException: Not a managed type: class com.xiaomo.dreamclock.model.clockin.ClockInRecord at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1745) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:576) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:498) at org.springframework.beans.factory.support.AbstractBeanFactory.lambda0(AbstractBeanFactory.java:320)atorg.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222)atorg.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:318)atorg.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199)atorg.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:277)atorg.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1244)atorg.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1164)atorg.springframework.beans.factory.support.ConstructorResolver.resolveAutowiredArgument(ConstructorResolver.java:857)atorg.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:760)...32moreCausedby:org.springframework.beans.factory.BeanCreationException:Errorcreatingbeanwithname′clockInRecordRepository′:Invocationofinitmethodfailed;nestedexceptionisjava.lang.IllegalArgumentException:Notamanagedtype:classcom.xiaomo.dreamclock.model.clockin.ClockInRecordatorg.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1745)atorg.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:576)atorg.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:498)atorg.springframework.beans.factory.support.AbstractBeanFactory.lambdadoGetBean0(AbstractBeanFactory.java:320)atorg.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222)atorg.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:318)atorg.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199)atorg.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:277)atorg.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1244)atorg.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1164)atorg.springframework.beans.factory.support.ConstructorResolver.resolveAutowiredArgument(ConstructorResolver.java:857)atorg.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:760)...46moreCausedby:java.lang.IllegalArgumentException:Notamanagedtype:classcom.xiaomo.dreamclock.model.clockin.ClockInRecordatorg.hibernate.metamodel.internal.MetamodelImpl.managedType(MetamodelImpl.java:552)atorg.springframework.data.jpa.repository.support.JpaMetamodelEntityInformation.<init>(JpaMetamodelEntityInformation.java:74)atorg.springframework.data.jpa.repository.support.JpaEntityInformationSupport.getEntityInformation(JpaEntityInformationSupport.java:66)atorg.springframework.data.jpa.repository.support.JpaRepositoryFactory.getEntityInformation(JpaRepositoryFactory.java:188)atorg.springframework.data.jpa.repository.support.JpaRepositoryFactory.getTargetRepository(JpaRepositoryFactory.java:139)atorg.springframework.data.jpa.repository.support.JpaRepositoryFactory.getTargetRepository(JpaRepositoryFactory.java:123)atorg.springframework.data.jpa.repository.support.JpaRepositoryFactory.getTargetRepository(JpaRepositoryFactory.java:64)atorg.springframework.data.repository.core.support.RepositoryFactorySupport.getRepository(RepositoryFactorySupport.java:305)atorg.springframework.data.repository.core.support.RepositoryFactoryBeanSupport.lambda0(AbstractBeanFactory.java:320) at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222) at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:318) at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199) at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:277) at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1244) at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1164) at org.springframework.beans.factory.support.ConstructorResolver.resolveAutowiredArgument(ConstructorResolver.java:857) at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:760) ... 46 more Caused by: java.lang.IllegalArgumentException: Not a managed type: class com.xiaomo.dreamclock.model.clockin.ClockInRecord at org.hibernate.metamodel.internal.MetamodelImpl.managedType(MetamodelImpl.java:552) at org.springframework.data.jpa.repository.support.JpaMetamodelEntityInformation.<init>(JpaMetamodelEntityInformation.java:74) at org.springframework.data.jpa.repository.support.JpaEntityInformationSupport.getEntityInformation(JpaEntityInformationSupport.java:66) at org.springframework.data.jpa.repository.support.JpaRepositoryFactory.getEntityInformation(JpaRepositoryFactory.java:188) at org.springframework.data.jpa.repository.support.JpaRepositoryFactory.getTargetRepository(JpaRepositoryFactory.java:139) at org.springframework.data.jpa.repository.support.JpaRepositoryFactory.getTargetRepository(JpaRepositoryFactory.java:123) at org.springframework.data.jpa.repository.support.JpaRepositoryFactory.getTargetRepository(JpaRepositoryFactory.java:64) at org.springframework.data.repository.core.support.RepositoryFactorySupport.getRepository(RepositoryFactorySupport.java:305) at org.springframework.data.repository.core.support.RepositoryFactoryBeanSupport.lambda0(AbstractBeanFactory.java:320)atorg.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222)atorg.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:318)atorg.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199)atorg.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:277)atorg.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1244)atorg.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1164)atorg.springframework.beans.factory.support.ConstructorResolver.resolveAutowiredArgument(ConstructorResolver.java:857)atorg.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:760)...46moreCausedby:java.lang.IllegalArgumentException:Notamanagedtype:classcom.xiaomo.dreamclock.model.clockin.ClockInRecordatorg.hibernate.metamodel.internal.MetamodelImpl.managedType(MetamodelImpl.java:552)atorg.springframework.data.jpa.repository.support.JpaMetamodelEntityInformation.<init>(JpaMetamodelEntityInformation.java:74)atorg.springframework.data.jpa.repository.support.JpaEntityInformationSupport.getEntityInformation(JpaEntityInformationSupport.java:66)atorg.springframework.data.jpa.repository.support.JpaRepositoryFactory.getEntityInformation(JpaRepositoryFactory.java:188)atorg.springframework.data.jpa.repository.support.JpaRepositoryFactory.getTargetRepository(JpaRepositoryFactory.java:139)atorg.springframework.data.jpa.repository.support.JpaRepositoryFactory.getTargetRepository(JpaRepositoryFactory.java:123)atorg.springframework.data.jpa.repository.support.JpaRepositoryFactory.getTargetRepository(JpaRepositoryFactory.java:64)atorg.springframework.data.repository.core.support.RepositoryFactorySupport.getRepository(RepositoryFactorySupport.java:305)atorg.springframework.data.repository.core.support.RepositoryFactoryBeanSupport.lambdaafterPropertiesSet$5(RepositoryFactoryBeanSupport.java:297)
at org.springframework.data.util.Lazy.getNullable(Lazy.java:211)
at org.springframework.data.util.Lazy.get(Lazy.java:94)
at org.springframework.data.repository.core.support.RepositoryFactoryBeanSupport.afterPropertiesSet(RepositoryFactoryBeanSupport.java:300)
at org.springframework.data.jpa.repository.support.JpaRepositoryFactoryBean.afterPropertiesSet(JpaRepositoryFactoryBean.java:119)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1804)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1741)
… 57 more

24-Feb-2019 23:48:09.828 ÑÏÖØ [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployDirectory Error deploying web application directory [H:\MyTomcat\tomcat\webapps\dreamclock]
java.lang.IllegalStateException: ContainerBase.addChild: start: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/dreamclock]]
at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:758)
at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:730)
at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:734)
at org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:1140)
at org.apache.catalina.startup.HostConfigDeployDirectory.run(HostConfig.java:1875)atjava.base/java.util.concurrent.ExecutorsDeployDirectory.run(HostConfig.java:1875) at java.base/java.util.concurrent.ExecutorsDeployDirectory.run(HostConfig.java:1875)atjava.base/java.util.concurrent.ExecutorsRunnableAdapter.call(Executors.java:514)
at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1135)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
at java.base/java.lang.Thread.run(Thread.java:844)

24-Feb-2019 23:48:09.844 ÐÅÏ¢ [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployDirectory Deployment of web application directory [H:\MyTomcat\tomcat\webapps\dreamclock] has finished in [17,080] ms
24-Feb-2019 23:48:10.449 ÐÅÏ¢ [localhost-startStop-1] org.apache.jasper.servlet.TldScanner.scanJars At least one JAR was scanned for TLDs yet contained no TLDs. Enable debug logging for this logger for a complete list of JARs that were scanned but no TLDs were found in them. Skipping unneeded JARs during scanning can improve startup time and JSP compilation time.
24-Feb-2019 23:48:10.512 ÐÅÏ¢ [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployDirectory Deploying web application directory [H:\MyTomcat\tomcat\webapps\pavilion]
24-Feb-2019 23:48:13.968 ÐÅÏ¢ [localhost-startStop-1] org.apache.jasper.servlet.TldScanner.scanJars At least one JAR was scanned for TLDs yet contained no TLDs. Enable debug logging for this logger for a complete list of JARs that were scanned but no TLDs were found in them. Skipping unneeded JARs during scanning can improve startup time and JSP compilation time.
24-Feb-2019 23:48:26.179 ÑÏÖØ [localhost-startStop-1] org.apache.catalina.core.ContainerBase.addChildInternal ContainerBase.addChild: start:
org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/pavilion]]
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:167)
at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:754)
at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:730)
at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:734)
at org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:1140)
at org.apache.catalina.startup.HostConfigDeployDirectory.run(HostConfig.java:1875)atjava.base/java.util.concurrent.ExecutorsDeployDirectory.run(HostConfig.java:1875) at java.base/java.util.concurrent.ExecutorsDeployDirectory.run(HostConfig.java:1875)atjava.base/java.util.concurrent.ExecutorsRunnableAdapter.call(Executors.java:514)
at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1135)
at java.base/java.util.concurrent.ThreadPoolExecutorWorker.run(ThreadPoolExecutor.java:635)atjava.base/java.lang.Thread.run(Thread.java:844)Causedby:org.springframework.jmx.export.UnableToRegisterMBeanException:UnabletoregisterMBean[HikariDataSource(HikariPool−2)]withkey′dataSource′;nestedexceptionisjavax.management.InstanceAlreadyExistsException:com.zaxxer.hikari:name=dataSource,type=HikariDataSourceatorg.springframework.jmx.export.MBeanExporter.registerBeanNameOrInstance(MBeanExporter.java:625)atorg.springframework.jmx.export.MBeanExporter.lambdaWorker.run(ThreadPoolExecutor.java:635) at java.base/java.lang.Thread.run(Thread.java:844) Caused by: org.springframework.jmx.export.UnableToRegisterMBeanException: Unable to register MBean [HikariDataSource (HikariPool-2)] with key 'dataSource'; nested exception is javax.management.InstanceAlreadyExistsException: com.zaxxer.hikari:name=dataSource,type=HikariDataSource at org.springframework.jmx.export.MBeanExporter.registerBeanNameOrInstance(MBeanExporter.java:625) at org.springframework.jmx.export.MBeanExporter.lambdaWorker.run(ThreadPoolExecutor.java:635)atjava.base/java.lang.Thread.run(Thread.java:844)Causedby:org.springframework.jmx.export.UnableToRegisterMBeanException:UnabletoregisterMBean[HikariDataSource(HikariPool−2)]withkey′dataSource′;nestedexceptionisjavax.management.InstanceAlreadyExistsException:com.zaxxer.hikari:name=dataSource,type=HikariDataSourceatorg.springframework.jmx.export.MBeanExporter.registerBeanNameOrInstance(MBeanExporter.java:625)atorg.springframework.jmx.export.MBeanExporter.lambdaregisterBeans$2(MBeanExporter.java:551)
at java.base/java.util.HashMap.forEach(HashMap.java:1341)
at org.springframework.jmx.export.MBeanExporter.registerBeans(MBeanExporter.java:551)
at org.springframework.jmx.export.MBeanExporter.afterSingletonsInstantiated(MBeanExporter.java:434)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:863)
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:863)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:546)
at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:142)
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:775)
at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:397)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:316)
at org.springframework.boot.web.servlet.support.SpringBootServletInitializer.run(SpringBootServletInitializer.java:157)
at org.springframework.boot.web.servlet.support.SpringBootServletInitializer.createRootApplicationContext(SpringBootServletInitializer.java:137)
at org.springframework.boot.web.servlet.support.SpringBootServletInitializer.onStartup(SpringBootServletInitializer.java:91)
at org.springframework.web.SpringServletContainerInitializer.onStartup(SpringServletContainerInitializer.java:171)
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5245)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
… 10 more
Caused by: javax.management.InstanceAlreadyExistsException: com.zaxxer.hikari:name=dataSource,type=HikariDataSource
at java.management/com.sun.jmx.mbeanserver.Repository.addMBean(Repository.java:436)
at java.management/com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.registerWithRepository(DefaultMBeanServerInterceptor.java:1855)
at java.management/com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.registerDynamicMBean(DefaultMBeanServerInterceptor.java:955)
at java.management/com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.registerObject(DefaultMBeanServerInterceptor.java:890)
at java.management/com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.registerMBean(DefaultMBeanServerInterceptor.java:320)
at java.management/com.sun.jmx.mbeanserver.JmxMBeanServer.registerMBean(JmxMBeanServer.java:522)
at org.springframework.jmx.support.MBeanRegistrationSupport.doRegister(MBeanRegistrationSupport.java:137)
at org.springframework.jmx.export.MBeanExporter.registerBeanInstance(MBeanExporter.java:671)
at org.springframework.jmx.export.MBeanExporter.registerBeanNameOrInstance(MBeanExporter.java:615)
… 27 more
环境记录
Spring Boot项目一：

部署方式：war包；数据库：MySQL；数据访问方式：JPA

Spring Boot项目二：

部署方式：war包；数据库：MySQL；数据访问方式：JPA

问题分析
通过查看log，可以得出是Spring创建 Controller：clockInRecordController时发生了错误，错误原因是通过构造函数传入clockInRecordServiceImp这一Service的实现时出错了；这一Service出错的原因是在构造函数中传入的Repository出错了；Repository出错的原因是调用初始化方法失败；最内层的原因是：ClockInRecord不是一个被管理的类！

Caused by: org.springframework.beans.factory.UnsatisfiedDependencyException:
Error creating bean with name ‘clockInRecordController’ defined in file
[H:\MyTomcat\tomcat\webapps\dreamclock\WEB-
INF\classes\com\xiaomo\dreamclock\controller\clockin
ClockInRecordController.class]: Unsatisfied
dependency expressed through constructor parameter 0; nested exception is
org.springframework.beans.factory.UnsatisfiedDependencyException:
Error creating bean with name ‘clockInRecordServiceImp’ defined in file
[H:\MyTomcat\tomcat\webapps\dreamclock\WEB-
INF\classes\com\xiaomo\dreamclock\service\clockin\imp
ClockInRecordServiceImp.class]: Unsatisfied dependency expressed
through constructor parameter 0; nested exception is
org.springframework.beans.factory.BeanCreationException: Error creating bean with name
‘clockInRecordRepository’: Invocation of init method failed; nested exception is
java.lang.IllegalArgumentException: Not a managed type: class
com.xiaomo.dreamclock.model.clockin.ClockInRecord
到这里，自然要考虑为啥ClockInRecord这一实体类没有被Spring 管理了。而这就误入歧途了！因为这仍然不是根本原因；

当然，针对这一问题，我也是问过度娘的~ 基本的原因无非是Spring Boot扫描包的时候并没有将实体类扫描到，或者是实体类缺少了@Entity注解；针对前一种可能，我在遇到org.hibernate.AnnotationException异常时就进行了扫描相关的配置；至于缺少@Entity注解，更不是问题所在：加没加该注解，自己还不清楚吗？

另外，因为单独部署Pavilion和DreamClock项目时并无问题，所以上面提到的异常链，仍然是不全的。

一度以为是云主机配置太差，内存不够导致一些组件没能正常工作。。。。但是在本地tomcat里部署时也出现了该问题，这就排除了硬件限制；

接着往下看，就发现了问题所在：

Caused by: org.springframework.jmx.export.UnableToRegisterMBeanException: Unable to register MBean [HikariData

应该是dataSource注册失败，导致了这一系列问题；内部原因是因为dataSource已经存在了，或者说已经在注册过了。

问题解决
在StackOverflow上找到了该问题及其回答：unable-to-register-mbean

简单来说，是JMX出现了问题。Spring 默认JMX是开启的，所以解决方法之一就是在application.properties或者application.yml里配置spring.jmx.enabled=false；

办法2：

在application中各自配置

spring.jmx.default-domain=project1

spring.jmx.default-domain=project2

以保证domain是两个不一样的

Tomcat部署多个Sring Boot项目时Unable To Register MBean Exception的一种解决方法相关推荐

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