Question

我们正在为我们的应用程序使用Spring Boot。在启动应用程序之后，在运行时我们将新的Bean添加（加载）到现有的Applicationcontext。

AnnotationConfigApplicationContext appContext = new AnnotationConfigApplicationContext();
appContext.register(NewBean.class);
appContext.refresh();

添加bean之后我们正在刷新applicationContext

在刷新期间，MBean正在尝试重新注册某些端点，并且我们收到以下错误（获取所有这些端点的错误 - requestMappingEndpoint，environmentEndpoint，healthEndpoint，beansEndpoint，infoEndpoint，metricsEndpoint，traceEndpoint，dumpEndpoint， autoConfigurationAuditEndpoint，shutdownEndpoint，configurationPropertiesReportEndpoint）

Caused by: javax.management.InstanceAlreadyExistsException: org.springframework.boot:type=Endpoint,name=configurationPropertiesReportEndpoint
        at com.sun.jmx.mbeanserver.Repository.addMBean(Unknown Source)
        at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.registerWithRepository(Unknown Source)
        at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.registerDynamicMBean(Unknown Source)
        at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.registerObject(Unknown Source)
        at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.registerMBean(Unknown Source)
        at com.sun.jmx.mbeanserver.JmxMBeanServer.registerMBean(Unknown Source)
        at org.springframework.jmx.support.MBeanRegistrationSupport.doRegister(MBeanRegistrationSupport.java:195)
        at org.springframework.jmx.export.MBeanExporter.registerBeanInstance(MBeanExporter.java:662)
        at org.springframework.jmx.export.MBeanExporter.registerBeanNameOrInstance(MBeanExporter.java:605)

有人可以告诉我们如何跳过这个例外吗？

我也试过以下

@EnableIntegrationMBeanExport(registration = RegistrationPolicy.REPLACE_EXISTING)

但获得以下异常

Caused by: org.springframework.jmx.export.UnableToRegisterMBeanException: Unable to register MBean [org.springframework.integration.monitor.IntegrationMBeanExporter@16c5464] with key 'integrationMbeanExporter'; nested exception is javax.management.InstanceAlreadyExistsException: org.springframework.integration.monitor:name=integrationMbeanExporter,type=IntegrationMBeanExporter
    at org.springframework.jmx.export.MBeanExporter.registerBeanNameOrInstance(MBeanExporter.java:609)
    at org.springframework.jmx.export.MBeanExporter.registerBeans(MBeanExporter.java:534)
    at org.springframework.jmx.export.MBeanExporter.afterPropertiesSet(MBeanExporter.java:416)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1612)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1549)
    ... 22 more
Caused by: javax.management.InstanceAlreadyExistsException: org.springframework.integration.monitor:name=integrationMbeanExporter,type=IntegrationMBeanExporter
    at com.sun.jmx.mbeanserver.Repository.addMBean(Repository.java:437)
    at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.registerWithRepository(DefaultMBeanServerInterceptor.java:1898)
    at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.registerDynamicMBean(DefaultMBeanServerInterceptor.java:966)
    at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.registerObject(DefaultMBeanServerInterceptor.java:900)
    at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.registerMBean(DefaultMBeanServerInterceptor.java:324)
    at com.sun.jmx.mbeanserver.JmxMBeanServer.registerMBean(JmxMBeanServer.java:522)
    at org.springframework.jmx.support.MBeanRegistrationSupport.doRegister(MBeanRegistrationSupport.java:195)
    at org.springframework.jmx.export.MBeanExporter.registerBeanInstance(MBeanExporter.java:662)
    at org.springframework.jmx.export.MBeanExporter.registerBeanNameOrInstance(MBeanExporter.java:599)
    ... 26 more

Answer 1

在现有 ApplicationContext上调用刷新之前，您应首先销毁它，否则Bean会继续运行。

AnnotationConfigApplicationContext appContext = new AnnotationConfigApplicationContext();
appContext.register(NewBean.class);
appContext.refresh();

您在此处展示的是您正在构建新上下文而不是重用现有上下文。 register方法也适用于@Configuration类而不是任意bean。如果您想添加这些，只需使用ApplicationContext上的其中一种方法，例如registerSingleton。但一般来说，在运行时添加bean应该是件坏事（imho）。

Answer 2

某些applicationContext可以刷新次数，但不能刷新AnnotationConfigApplicationContext。当你构造运行了刷新方法的AnnotationConfigApplicationContext时，会报告异常，你可以先破坏它，然后刷新

在Spring Boot应用程序中刷新Spring ApplicationContext时获取异常

2 个答案: