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启动springboot项目失败，报如下错误！

at com.aiways.boss.AiwaysBossVoiceServiceApplication.main(AiwaysBossVoiceServiceApplication.java:25)Caused by: javax.management.InstanceAlreadyExistsException: MXBean already registered with name org.apache.commons.pool2:type=GenericKeyedObjectPool,name=pool	at com.sun.jmx.mbeanserver.MXBeanLookup.addReference(MXBeanLookup.java:151)	at com.sun.jmx.mbeanserver.MXBeanSupport.register(MXBeanSupport.java:160)	at com.sun.jmx.mbeanserver.MBeanSupport.preRegister2(MBeanSupport.java:173)	at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.registerDynamicMBean(DefaultMBeanServerInterceptor.java:930)	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:674)	at org.springframework.jmx.export.MBeanExporter.registerBeanNameOrInstance(MBeanExporter.java:618)

MXBean already registered，bean已经被注册。

解决方法：

启动类加上：

@EnableMBeanExport(registration = RegistrationPolicy.IGNORE_EXISTING)

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