啓動springboot項目失敗，報如下錯誤！
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已經被註冊。
解決方法：
啓動類加上：
@EnableMBeanExport(registration = RegistrationPolicy.IGNORE_EXISTING)