java BeanCreationException:创建名为“springApplicationAdminRegistrar”的bean时出错。InstanceAlreadyExistsException

Question

我有两个spring启动应用程序

应用程序A取决于应用程序B

实际上，每个应用程序都有标记为@SpringBootApplication的主类

application_B成功启动，但application_A未启动：

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'springApplicationAdminRegistrar' defined in class path resource [org/springframework/boot/autoconfigure/admin/SpringApplicationAdminJmxAutoConfiguration.class]: Invocation of init method failed; nested exception is javax.management.InstanceAlreadyExistsException: org.springframework.boot:type=Admin,name=SpringApplication # JMX name of the application admin MBean.
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1628)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:555)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:483)
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306)
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230)
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:761)
    at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:867)
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:543)
    at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:693)
    at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:360)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:303)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1118)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1107)
    at pack.Application.main(Application.java:36)
Caused by: javax.management.InstanceAlreadyExistsException: org.springframework.boot:type=Admin,name=SpringApplication # JMX name of the application admin MBean.
    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.boot.admin.SpringApplicationAdminMXBeanRegistrar.afterPropertiesSet(SpringApplicationAdminMXBeanRegistrar.java:92)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1687)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1624)
    ... 15 common frames omitted

在debug中，我看到spring在启动期间执行了两次org.springframework.boot.autoconfigure.admin.SpringApplicationAdminJmxAutoConfiguration#springApplicationAdminRegistrar，但失败了

我尝试设置属性：

 spring.application.admin.enabled=false

但这对我没有帮助

我怎样才能避免这个例外

附言

我找到了这个https://github.com/spring-projects/spring-boot/issues/6378但是没有解决办法

Answer 1

{}的代码如下：

String jmxName = this.environment.getProperty(JMX_NAME_PROPERTY,
            DEFAULT_JMX_NAME);
    if (this.mbeanExporters != null) { // Make sure to not register that MBean twice
        for (MBeanExporter mbeanExporter : this.mbeanExporters) {
            mbeanExporter.addExcludedBean(jmxName);
        }
    }
    return new SpringApplicationAdminMXBeanRegistrar(jmxName);

我们有这些常数：

/**
 * The property to use to customize the {@code ObjectName} of the application admin
 * mbean.
 */
private static final String JMX_NAME_PROPERTY = "spring.application.admin.jmx-name";

/**
 * The default {@code ObjectName} of the application admin mbean.
 */
private static final String DEFAULT_JMX_NAME = "org.springframework.boot:type=Admin,name=SpringApplication";

这样，您应该考虑使每个应用程序的^ ^ }都是唯一的。我的意思是您需要指定spring.application.admin.jmx-name配置属性