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java.lang.NullPointerException: 	at org.springframework.jmx.export.MBeanExporter.replaceNotificationListenerBeanNameMappingKeysIfNecessary(MBeanExporter.java:624)	at org.springframework.jmx.export.MBeanExporter.registerBeanNameOrInstance(MBeanExporter.java:595)	at org.springframework.jmx.export.MBeanExporter.registerBeans(MBeanExporter.java:511)	at org.springframework.jmx.export.MBeanExporter.afterPropertiesSet(MBeanExporter.java:402)	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1288)	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1257)	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:438)	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory$1.run(AbstractAutowireCapableBeanFactory.java:383)	at java.security.AccessController.doPrivileged(Native Method)	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:353)	at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:245)	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:169)	at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:242)	at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:164)	at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:400)	at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:736)	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:369)	at org.springframework.web.context.ContextLoader.createWebApplicationContext(ContextLoader.java:261)	at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:199)	at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:45)