java.lang.NullPointerException: This exception has no message.

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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 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 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 weblogic.management.internal.MBeanProxy.setAttribute(MBeanProxy.java:322)
at weblogic.management.internal.MBeanProxy.invoke(MBeanProxy.java:204)
at undefined.$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.kernel.ExecuteThread.execute(ExecuteThread.java:139)
at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:120)

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