java – 关闭Spring引导应用程序时无法注销数据源JMX MBean

我有一个简单的 Spring Boot应用程序使用org.apache.commons.dbcp2.BasicDataSource作为dataSource bean.

数据源通过Spring引导自动显示为MBean.

豆声明：

@Bean
public DataSource dataSource() {
    BasicDataSource dataSource = new BasicDataSource();
    dataSource.setUrl(dbUrl);
    dataSource.setDriverClassName(jdbcDriver);
    dataSource.setUsername(dbUserName);
    dataSource.setPassword(dbPassword);
    return dataSource;
}

一切都很好.但是,我在关闭应用程序时看到错误.此错误仅在运行可执行jar时发生.当使用Gradle Spring插件(gradle bootRun)时,没有显示.

javax.management.InstanceNotFoundException: org.apache.commons.dbcp2:name=dataSource,type=BasicDataSource
    at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.getMBean(DefaultMBeanServerInterceptor.java:1095)
    at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.exclusiveUnregisterMBean(DefaultMBeanServerInterceptor.java:427)
    at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.unregisterMBean(DefaultMBeanServerInterceptor.java:415)
    at com.sun.jmx.mbeanserver.JmxMBeanServer.unregisterMBean(JmxMBeanServer.java:546)
    at org.apache.commons.dbcp2.BasicDataSource.close(BasicDataSource.java:1822)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:483)
    at org.springframework.beans.factory.support.disposableBeanAdapter.invokeCustomDestroyMethod(disposableBeanAdapter.java:350)
    at org.springframework.beans.factory.support.disposableBeanAdapter.destroy(disposableBeanAdapter.java:273)
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroyBean(DefaultSingletonBeanRegistry.java:540)
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroySingleton(DefaultSingletonBeanRegistry.java:516)
    at org.springframework.beans.factory.support.DefaultListablebeanfactory.destroySingleton(DefaultListablebeanfactory.java:827)
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroySingletons(DefaultSingletonBeanRegistry.java:485)
    at org.springframework.context.support.AbstractApplicationContext.destroyBeans(AbstractApplicationContext.java:921)
    at org.springframework.context.support.AbstractApplicationContext.doClose(AbstractApplicationContext.java:895)
    at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.doClose(EmbeddedWebApplicationContext.java:152)
    at org.springframework.context.support.AbstractApplicationContext$1.run(AbstractApplicationContext.java:809)

我想知道,
1.这个bean如何暴露为JMX MBean？
2.如何正确注销这个MBean？

解决方法

Spring试图关闭BasicDataSource两次：

> BasicDataSource在应用程序关闭时自动关闭
> Spring使用默认的destroy方法来关闭DataSource,但是它已经关闭了

为避免这种情况,请使用：

@Bean(destroyMethod = "")
public DataSource dataSource()

在您的Java配置中