关闭Spring Boot应用程序时无法注销DataSource JMX MBean

Question

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

Spring引导自动将数据源公开为MBean.

bean声明:

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

一切正常.但是,我在关闭应用程序时看到错误.只有在运行可执行jar时才会出现此错误.使用Gradle Spring插件(gradle bootRun)时,不会显示.

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如何作为JMX MBean公开？2.如何正确注销这个MBean？

Answer 1

Spring试图关闭BasicDataSource两次:

1. 应用程序关闭时,BasicDataSource自动关闭
2. Spring使用默认的destroy方法来关闭DataSource,但它已经关闭了

为避免这种情况,请使用:

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

在Java配置中