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java.lang.NullPointerException: 	at java.util.Hashtable.get(Hashtable.java:320)	at weblogic.connector.common.internal.ConnectionPoolManager.removeManagedConnectionFactory(ConnectionPoolManager.java:75)	at weblogic.j2ee.ResourceAdapterComponent.undeploy(ResourceAdapterComponent.java:207)	at weblogic.j2ee.Application.undeploy(Application.java:274)	at weblogic.j2ee.J2EEService.undeployApplication(J2EEService.java:227)	at weblogic.management.mbeans.custom.Application.setLocalDeployed(Application.java:366)	at weblogic.management.mbeans.custom.Application.setDeployed(Application.java:296)	at java.lang.reflect.Method.invoke(Native Method)	at weblogic.management.internal.DynamicMBeanImpl.invokeSetter(DynamicMBeanImpl.java:1388)	at weblogic.management.internal.DynamicMBeanImpl.setAttribute(DynamicMBeanImpl.java:881)	at weblogic.management.internal.DynamicMBeanImpl.setAttribute(DynamicMBeanImpl.java:847)	at weblogic.management.internal.ConfigurationMBeanImpl.setAttribute(ConfigurationMBeanImpl.java:295)	at com.sun.management.jmx.MBeanServerImpl.setAttribute(MBeanServerImpl.java:1356)	at com.sun.management.jmx.MBeanServerImpl.setAttribute(MBeanServerImpl.java:1331)	at weblogic.management.internal.ConfigurationMBeanImpl.updateConfigMBeans(ConfigurationMBeanImpl.java:392)	at weblogic.management.internal.ConfigurationMBeanImpl.setAttribute(ConfigurationMBeanImpl.java:298)	at com.sun.management.jmx.MBeanServerImpl.setAttribute(MBeanServerImpl.java:1356)	at com.sun.management.jmx.MBeanServerImpl.setAttribute(MBeanServerImpl.java:1331)	at weblogic.management.internal.MBeanProxy.setAttribute(MBeanProxy.java:322)	at weblogic.management.internal.MBeanProxy.invoke(MBeanProxy.java:204)	at $Proxy84.setDeployed(Unknown Source)	at weblogic.management.internal.MBeanHomeImpl.internalDeleteMBean(MBeanHomeImpl.java:1115)	at weblogic.management.internal.MBeanHomeImpl.deleteMBean(MBeanHomeImpl.java:1072)	at weblogic.management.internal.AdminMBeanHomeImpl.deleteMBean(AdminMBeanHomeImpl.java:558)	at weblogic.management.console.utils.MBeans.unregister(MBeans.java:1423)	at weblogic.management.console.actions.mbean.DoDeleteMBeanAction.perform(DoDeleteMBeanAction.java:111)	at weblogic.management.console.actions.internal.ActionServlet.doAction(ActionServlet.java:171)	at weblogic.management.console.actions.internal.ActionServlet.doPost(ActionServlet.java:85)	at javax.servlet.http.HttpServlet.service(HttpServlet.java:760)	at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)	at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:265)	at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:200)	at weblogic.servlet.internal.WebAppServletContext.invokeServlet(WebAppServletContext.java:2495)	at weblogic.servlet.internal.ServletRequestImpl.execute(ServletRequestImpl.java:2204)	at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:139)	at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:120)