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java.lang.NullPointerException: 	at oracle.mds.internal.persistence.NamespaceRulesImpl.(NamespaceRulesImpl.java:123)	at oracle.mds.internal.persistence.NamespaceRules.getNamespaceRulesObj(NamespaceRules.java:72)	at oracle.mds.internal.util.ChangeUtil.convertToMOEvents(ChangeUtil.java:134)	at oracle.mds.internal.notifications.EventNotificationManager.handleChanges(EventNotificationManager.java:490)	at oracle.mds.internal.notifications.EventNotificationManager.handlePChanges(EventNotificationManager.java:291)	at oracle.mds.core.MOState.signalStale(MOState.java:1185)	at oracle.mds.core.MOState.signalStale(MOState.java:644)	at oracle.mds.core.MOState.checkStalenessDocFromBuilder(MOState.java:739)	at oracle.mds.core.MOState.getIsStaleLastModified(MOState.java:559)	at oracle.mds.core.MOContent.getIsStaleLastModified(MOContent.java:277)	at oracle.mds.core.ChainedMOContent.getIsStaleLastModified(ChainedMOContent.java:142)	at oracle.mds.core.MetadataObject.isStale(MetadataObject.java:823)	at oracle.adf.share.jndi.MDSBackingStore.obtainMetadataObject(MDSBackingStore.java:517)	at oracle.adf.share.jndi.MDSBackingStore.getMOBean(MDSBackingStore.java:572)	at oracle.adf.mbean.share.config.RuntimeMXBeanImpl.init(RuntimeMXBeanImpl.java:192)	at oracle.adf.mbean.share.config.RuntimeMXBeanImpl.(RuntimeMXBeanImpl.java:182)	at oracle.adf.mbean.share.config.RuntimeMXBeanImpl.(RuntimeMXBeanImpl.java:173)	at oracle.adf.mbean.share.config.RuntimeMXBeanImpl.(RuntimeMXBeanImpl.java:165)	at oracle.adf.mbean.share.config.ADFConfigLifeCycleCallBack.contextInitialized(ADFConfigLifeCycleCallBack.java:130)	at weblogic.servlet.internal.EventsManager$FireContextListenerAction.run(EventsManager.java:481)	at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321)	at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:120)	at weblogic.servlet.internal.EventsManager.notifyContextCreatedEvent(EventsManager.java:181)	at weblogic.servlet.internal.WebAppServletContext.preloadResources(WebAppServletContext.java:1868)	at weblogic.servlet.internal.WebAppServletContext.start(WebAppServletContext.java:3154)	at weblogic.servlet.internal.WebAppModule.startContexts(WebAppModule.java:1518)	at weblogic.servlet.internal.WebAppModule.start(WebAppModule.java:484)	at weblogic.application.internal.flow.ModuleStateDriver$3.next(ModuleStateDriver.java:425)	at weblogic.application.utils.StateMachineDriver.nextState(StateMachineDriver.java:52)	at weblogic.application.internal.flow.ModuleStateDriver.start(ModuleStateDriver.java:119)	at weblogic.application.internal.flow.ScopedModuleDriver.start(ScopedModuleDriver.java:200)	at weblogic.application.internal.flow.ModuleListenerInvoker.start(ModuleListenerInvoker.java:247)	at weblogic.application.internal.flow.ModuleStateDriver$3.next(ModuleStateDriver.java:425)	at weblogic.application.utils.StateMachineDriver.nextState(StateMachineDriver.java:52)	at weblogic.application.internal.flow.ModuleStateDriver.start(ModuleStateDriver.java:119)