How to update Role using JON CLI

Issue

• How to update Role using JON CLI
• Wierd null pointer error while executing jboss cli script
• when trying to execute RoleManager.updateRole(role);

Remote server version is: 3.3.0.GA (4f16df3:e347f77)
Login successful
org.rhq.enterprise.client.script.CLIScriptException: org.rhq.scripting.javascript.engine.util.ExtendedScriptException: org.mozilla.javascript.WrappedException: Wrapped org.jboss.remoting.CannotConnectException: Can not connect http client invoker after 1 attempt(s) (<Unknown source>#73) in <Unknown source> at line number 73
        at org.rhq.enterprise.client.commands.ScriptCommand.executeScriptFile(ScriptCommand.java:291)
        at org.rhq.enterprise.client.commands.ScriptCommand.execute(ScriptCommand.java:93)
        at org.rhq.enterprise.client.ClientMain$StartupConfiguration.process(ClientMain.java:163)
        at org.rhq.enterprise.client.ClientMain.run(ClientMain.java:188)
        at org.rhq.enterprise.client.ClientMain.main(ClientMain.java:172)
Caused by: org.rhq.scripting.javascript.engine.util.ExtendedScriptException: org.mozilla.javascript.WrappedException: Wrapped org.jboss.remoting.CannotConnectException: Can not connect http client invoker after 1 attempt(s) (<Unknown source>#73) in <Unknown source> at line number 73
        at org.rhq.scripting.javascript.engine.RhinoScriptEngine.eval(RhinoScriptEngine.java:375)
        at javax.script.AbstractScriptEngine.eval(AbstractScriptEngine.java:249)
        at org.rhq.enterprise.client.commands.ScriptCommand.executeScriptFile(ScriptCommand.java:280)
        ... 4 more
Caused by: org.mozilla.javascript.WrappedException: Wrapped org.jboss.remoting.CannotConnectException: Can not connect http client invoker after 1 attempt(s) (<Unknown source>#73)
        at org.mozilla.javascript.Context.throwAsScriptRuntimeEx(Context.java:1754)
        at org.mozilla.javascript.MemberBox.invoke(MemberBox.java:148)
        at org.mozilla.javascript.NativeJavaMethod.call(NativeJavaMethod.java:225)
        at org.mozilla.javascript.Interpreter.interpretLoop(Interpreter.java:1473)
        at org.mozilla.javascript.Interpreter.interpret(Interpreter.java:815)
        at org.mozilla.javascript.InterpretedFunction.call(InterpretedFunction.java:109)
        at org.mozilla.javascript.ContextFactory.doTopCall(ContextFactory.java:394)
        at org.rhq.scripting.javascript.engine.RhinoScriptEngine$1.superDoTopCall(RhinoScriptEngine.java:235)
        at org.rhq.scripting.javascript.engine.RhinoScriptEngine$1.access$000(RhinoScriptEngine.java:199)
        at org.rhq.scripting.javascript.engine.RhinoScriptEngine$1$1.run(RhinoScriptEngine.java:215)
        at java.security.AccessController.doPrivileged(Native Method)
        at org.rhq.scripting.javascript.engine.RhinoScriptEngine$1.doTopCall(RhinoScriptEngine.java:212)
        at org.mozilla.javascript.ScriptRuntime.doTopCall(ScriptRuntime.java:3091)
        at org.mozilla.javascript.InterpretedFunction.exec(InterpretedFunction.java:120)
        at org.mozilla.javascript.Context.evaluateReader(Context.java:1110)
        at org.rhq.scripting.javascript.engine.RhinoScriptEngine.eval(RhinoScriptEngine.java:363)
        ... 6 more
Caused by: org.jboss.remoting.CannotConnectException: Can not connect http client invoker after 1 attempt(s)
        at org.jboss.remoting.transport.http.HTTPClientInvoker.makeInvocation(HTTPClientInvoker.java:271)
        at org.jboss.remoting.transport.http.HTTPClientInvoker.transport(HTTPClientInvoker.java:176)
        at org.jboss.remoting.MicroRemoteClientInvoker.invoke(MicroRemoteClientInvoker.java:169)
        at org.jboss.remoting.Client.invoke(Client.java:2084)
        at org.jboss.remoting.Client.invoke(Client.java:879)
        at org.jboss.remoting.Client.invoke(Client.java:867)
        at org.rhq.enterprise.clientapi.RemoteClient.remoteInvoke(RemoteClient.java:120)
        at org.rhq.enterprise.clientapi.RemoteClientProxy.doInvoke(RemoteClientProxy.java:62)
        at org.rhq.bindings.client.AbstractRhqFacadeProxy.invoke(AbstractRhqFacadeProxy.java:69)
        at org.rhq.enterprise.clientapi.RemoteClientProxy.invoke(RemoteClientProxy.java:52)
        at com.sun.proxy.$Proxy28.updateRole(Unknown Source)
        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.mozilla.javascript.MemberBox.invoke(MemberBox.java:126)
        ... 20 more
Caused by: java.lang.NullPointerException