最近一个项目用到alibaba的druid，但第二的时候就报错如下：
2016-07-12 11:17:39,799 52474014 [localhost-startStop-2] ERROR c.a.d.s.DruidDataSourceStatManager - unregister mbean error javax.management.InstanceNotFoundException: com.alibaba.druid:type=DruidDataSourceStat 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 com.alibaba.druid.stat.DruidDataSourceStatManager.removeDataSource(DruidDataSourceStatManager.java:200) at com.alibaba.druid.pool.DruidDataSource.run(DruidDataSource.java:1413) at java.security.AccessController.doPrivileged(Native Method) at com.alibaba.druid.pool.DruidDataSource.unregisterMbean(DruidDataSource.java:1409) at com.alibaba.druid.pool.DruidDataSource.close(DruidDataSource.java:1368) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:606) at org.springframework.beans.factory.support.DisposableBeanAdapter.invokeCustomDestroyMethod(DisposableBeanAdapter.java:320) at org.springframework.beans.factory.support.DisposableBeanAdapter.destroy(DisposableBeanAdapter.java:246) at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroyBean(DefaultSingletonBeanRegistry.java:510) at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroySingleton(DefaultSingletonBeanRegistry.java:486) at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroySingletons(DefaultSingletonBeanRegistry.java:455) at org.springframework.context.support.AbstractApplicationContext.destroyBeans(AbstractApplicationContext.java:1090) at org.springframework.context.support.AbstractApplicationContext.doClose(AbstractApplicationContext.java:1064) at org.springframework.context.support.AbstractApplicationContext.close(AbstractApplicationContext.java:1010) at org.springframework.web.context.ContextLoader.closeWebApplicationContext(ContextLoader.java:549) at org.springframework.web.context.ContextLoaderListener.contextDestroyed(ContextLoaderListener.java:143) at org.apache.catalina.core.StandardContext.listenerStop(StandardContext.java:5014) at org.apache.catalina.core.StandardContext.stopInternal(StandardContext.java:5659) at org.apache.catalina.util.LifecycleBase.stop(LifecycleBase.java:232) at org.apache.catalina.core.ContainerBase$StopChild.call(ContainerBase.java:1575) at org.apache.catalina.core.ContainerBase$StopChild.call(ContainerBase.java:1564) at java.util.concurrent.FutureTask.run(FutureTask.java:262) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) at java.lang.Thread.run(Thread.java:745) 2016-07-12 11:17:40,767 52474982 [localhost-startStop-2] ERROR c.a.druid.stat.DruidStatService - unregister mbean error javax.management.InstanceNotFoundException: com.alibaba.druid:type=DruidStatService 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 com.alibaba.druid.stat.DruidStatService.unregisterMBean(DruidStatService.java:366) at com.alibaba.druid.stat.DruidDataSourceStatManager.removeDataSource(DruidDataSourceStatManager.java:205) at com.alibaba.druid.pool.DruidDataSource.run(DruidDataSource.java:1413) at java.security.AccessController.doPrivileged(Native Method) at com.alibaba.druid.pool.DruidDataSource.unregisterMbean(DruidDataSource.java:1409) at com.alibaba.druid.pool.DruidDataSource.close(DruidDataSource.java:1368) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:606) at org.springframework.beans.factory.support.DisposableBeanAdapter.invokeCustomDestroyMethod(DisposableBeanAdapter.java:320) at org.springframework.beans.factory.support.DisposableBeanAdapter.destroy(DisposableBeanAdapter.java:246) at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroyBean(DefaultSingletonBeanRegistry.java:510) at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroySingleton(DefaultSingletonBeanRegistry.java:486) at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroySingletons(DefaultSingletonBeanRegistry.java:455) at org.springframework.context.support.AbstractApplicationContext.destroyBeans(AbstractApplicationContext.java:1090) at org.springframework.context.support.AbstractApplicationContext.doClose(AbstractApplicationContext.java:1064) at org.springframework.context.support.AbstractApplicationContext.close(AbstractApplicationContext.java:1010) at org.springframework.web.context.ContextLoader.closeWebApplicationContext(ContextLoader.java:549) at org.springframework.web.context.ContextLoaderListener.contextDestroyed(ContextLoaderListener.java:143) at org.apache.catalina.core.StandardContext.listenerStop(StandardContext.java:5014) at org.apache.catalina.core.StandardContext.stopInternal(StandardContext.java:5659) at org.apache.catalina.util.LifecycleBase.stop(LifecycleBase.java:232) at org.apache.catalina.core.ContainerBase$StopChild.call(ContainerBase.java:1575) at org.apache.catalina.core.ContainerBase$StopChild.call(ContainerBase.java:1564) at java.util.concurrent.FutureTask.run(FutureTask.java:262) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) at java.lang.Thread.run(Thread.java:745) 2016-07-12
