JCO Connection giving error when try to edit or preview it.

Hi,
We have in our project PD6(Portal) only java stack & CD1(ECC6.0) system is acting as respective backend.
The JCO connection has already been configured for it,but when I try to edit or preview one of the JCO connection it is giving below error.
Error :
500   Internal Server Error
Failed to process request. Please contact your system administrator.
Root Cause
The initial exception that caused the request to fail, was:
   java.lang.NullPointerException
    at com.sap.tc.webdynpro.serverimpl.wdc.sl.SystemLandscapeFactory.checkStatus(SystemLandscapeFactory.java:991)
    at com.sap.tc.webdynpro.services.sal.sl.api.WDSystemLandscape.checkStatus(WDSystemLandscape.java:469)
    at com.sap.tc.webdynpro.tools.sld.NameDefinition.updateJCODestinations(NameDefinition.java:285)
    at com.sap.tc.webdynpro.tools.sld.NameDefinition.updateNavigation(NameDefinition.java:251)
    at com.sap.tc.webdynpro.tools.sld.NameDefinition.wdDoInit(NameDefinition.java:158)
    ... 45 more
Detailed Error Information
Detailed Exception Chain
java.lang.NullPointerException
     at com.sap.tc.webdynpro.serverimpl.wdc.sl.SystemLandscapeFactory.checkStatus(SystemLandscapeFactory.java:991)
     at com.sap.tc.webdynpro.services.sal.sl.api.WDSystemLandscape.checkStatus(WDSystemLandscape.java:469)
     at com.sap.tc.webdynpro.tools.sld.NameDefinition.updateJCODestinations(NameDefinition.java:285)
     at com.sap.tc.webdynpro.tools.sld.NameDefinition.updateNavigation(NameDefinition.java:251)
     at com.sap.tc.webdynpro.tools.sld.NameDefinition.wdDoInit(NameDefinition.java:158)
     at com.sap.tc.webdynpro.tools.sld.wdp.InternalNameDefinition.wdDoInit(InternalNameDefinition.java:236)
     at com.sap.tc.webdynpro.progmodel.generation.DelegatingView.doInit(DelegatingView.java:61)
     at com.sap.tc.webdynpro.progmodel.controller.Controller.initController(Controller.java:215)
     at com.sap.tc.webdynpro.progmodel.view.View.initController(View.java:445)
     at com.sap.tc.webdynpro.progmodel.controller.Controller.init(Controller.java:200)
     at com.sap.tc.webdynpro.progmodel.view.ViewManager.getView(ViewManager.java:709)
     at com.sap.tc.webdynpro.progmodel.view.ViewManager.bind(ViewManager.java:555)
     at com.sap.tc.webdynpro.progmodel.view.ViewManager.getView(ViewManager.java:724)
     at com.sap.tc.webdynpro.progmodel.view.ViewManager.bindRoot(ViewManager.java:579)
     at com.sap.tc.webdynpro.progmodel.view.ViewManager.init(ViewManager.java:155)
     at com.sap.tc.webdynpro.progmodel.view.InterfaceView.initController(InterfaceView.java:43)
     at com.sap.tc.webdynpro.progmodel.controller.Controller.init(Controller.java:200)
     at com.sap.tc.webdynpro.progmodel.view.ViewManager.getView(ViewManager.java:709)
     at com.sap.tc.webdynpro.progmodel.view.ViewManager.bind(ViewManager.java:555)
     at com.sap.tc.webdynpro.progmodel.view.ViewManager.makeVisible(ViewManager.java:789)
     at com.sap.tc.webdynpro.progmodel.view.ViewManager.performNavigation(ViewManager.java:296)
     at com.sap.tc.webdynpro.clientserver.cal.ClientApplication.navigate(ClientApplication.java:767)
     at com.sap.tc.webdynpro.clientserver.cal.ClientComponent.navigate(ClientComponent.java:881)
     at com.sap.tc.webdynpro.clientserver.window.WindowPhaseModel.doNavigation(WindowPhaseModel.java:498)
     at com.sap.tc.webdynpro.clientserver.window.WindowPhaseModel.processRequest(WindowPhaseModel.java:144)
     at com.sap.tc.webdynpro.clientserver.window.WebDynproWindow.processRequest(WebDynproWindow.java:335)
     at com.sap.tc.webdynpro.clientserver.cal.AbstractClient.executeTasks(AbstractClient.java:143)
     at com.sap.tc.webdynpro.clientserver.session.ApplicationSession.doProcessing(ApplicationSession.java:321)
     at com.sap.tc.webdynpro.clientserver.session.ClientSession.doApplicationProcessingStandalone(ClientSession.java:713)
     at com.sap.tc.webdynpro.clientserver.session.ClientSession.doApplicationProcessing(ClientSession.java:666)
     at com.sap.tc.webdynpro.clientserver.session.ClientSession.doProcessing(ClientSession.java:250)
     at com.sap.tc.webdynpro.clientserver.session.RequestManager.doProcessing(RequestManager.java:149)
     at com.sap.tc.webdynpro.serverimpl.defaultimpl.DispatcherServlet.doContent(DispatcherServlet.java:62)
     at com.sap.tc.webdynpro.serverimpl.defaultimpl.DispatcherServlet.doPost(DispatcherServlet.java:53)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:760)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
     at com.sap.engine.services.servlets_jsp.server.HttpHandlerImpl.runServlet(HttpHandlerImpl.java:401)
     at com.sap.engine.services.servlets_jsp.server.HttpHandlerImpl.handleRequest(HttpHandlerImpl.java:266)
     at com.sap.engine.services.httpserver.server.RequestAnalizer.startServlet(RequestAnalizer.java:386)
     at com.sap.engine.services.httpserver.server.RequestAnalizer.startServlet(RequestAnalizer.java:364)
     at com.sap.engine.services.httpserver.server.RequestAnalizer.invokeWebContainer(RequestAnalizer.java:1039)
     at com.sap.engine.services.httpserver.server.RequestAnalizer.handle(RequestAnalizer.java:265)
     at com.sap.engine.services.httpserver.server.Client.handle(Client.java:95)
     at com.sap.engine.services.httpserver.server.Processor.request(Processor.java:175)
     at com.sap.engine.core.service630.context.cluster.session.ApplicationSessionMessageListener.process(ApplicationSessionMessageListener.java:33)
     at com.sap.engine.core.cluster.impl6.session.MessageRunner.run(MessageRunner.java:41)
     at com.sap.engine.core.thread.impl3.ActionObject.run(ActionObject.java:37)
     at java.security.AccessController.doPrivileged(AccessController.java:219)
     at com.sap.engine.core.thread.impl3.SingleThread.execute(SingleThread.java:104)
     at com.sap.engine.core.thread.impl3.SingleThread.run(SingleThread.java:176)
Please let us know your input on this.
Regards
Nilesh

Likely Cause would be some fields for the backend system used to setup the JCO destination are not updated properly (i.e.
empty) in SLD. Once you have configured your SLD please also ensure that you have selected the relevant u201CMessage Server Connectionu201D. The Message Server, System Name and Logon Group must not be left empty. Ensure that SLD contains up-to-date and complete information about backend systems.
Check that the SLD is setup properly, check whether you have registered the system through config tool into SLD If not please register system into SLD so that all the parameters are transfered to SLD automatically. You need to do this even the u201CTest Connectionu201D to SLD is successful. Once you are registered you should be able to create the JCO destinations with out any issue.
Thank you.
Shyam

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    ... 19 more
    >
    Here are my source code
    Server side
    package oracle.demo.corba;
    import oraclecorba.Hello;
    import oraclecorba.HelloHelper;
    import org.omg.CORBA.ORB;
    import org.omg.CosNaming.Binding;
    import org.omg.CosNaming.BindingIteratorHolder;
    import org.omg.CosNaming.BindingListHolder;
    import org.omg.CosNaming.BindingType;
    import org.omg.CosNaming.NameComponent;
    import org.omg.CosNaming.NamingContext;
    import org.omg.CosNaming.NamingContextExt;
    import org.omg.CosNaming.NamingContextExtHelper;
    import org.omg.CosNaming.NamingContextPackage.NotFound;
    import org.omg.PortableServer.POA;
    import org.omg.PortableServer.POAHelper;
    import weblogic.common.T3ServicesDef;
    public class ORBStartup{
         private T3ServicesDef t3servicesdef;
         public void setServices(T3ServicesDef t3servicesdef)
            this.t3servicesdef = t3servicesdef;
         public static void main(String[] args)
            throws Exception
             try{
                  args = new String[4];
                  args[0] = "-ORBInitialHost";
                  args[1] = "some_address";
                  args[2] = "-ORBInitialPort";
                  args[3] = "8056";
                  System.out.println("...............startup...........");
                   // Create a new object request broker
                   ORB orb = ORB.init( args, null );
                   // get the root POA
                   POA rootpoa = POAHelper.narrow(orb.resolve_initial_references("RootPOA"));
                   // Activate PersistentPOA's POAManager, Without this
                   // All calls to Persistent Server will hang because POAManager
                   // will be in the 'HOLD' state.
                   rootpoa.the_POAManager().activate();
                // instantiate the servant
                   CorbaHelloImpl helloImpl = new CorbaHelloImpl();
                   helloImpl.setORB(orb);
                   org.omg.CORBA.Object helloObj = rootpoa.servant_to_reference(helloImpl);
                   Hello HelloRef = HelloHelper.narrow(helloObj);
               //  Resolve RootNaming context and bind a name for the servant.
                 // NOTE: If the Server is persistent in nature then using Persistent
                 // Name Service is a good choice. Even if ORBD is restarted the Name
                 // Bindings will be intact. To use Persistent Name Service use
                 // 'NameService' as the key for resolve_initial_references() when
                 // ORBD is running.
                   org.omg.CORBA.Object ncObj = orb.resolve_initial_references("NameService");
                   //This line works ONLY for INS(jdk 14 naming service)
                   // Since we have only an object reference, we must
                   // cast it to a NamingContext. We use a helper
                  // class for this purpose
                   NamingContextExt ncRef = NamingContextExtHelper.narrow( ncObj );
                   String name = "Hello";
                   NameComponent path[] = ncRef.to_name( name );
                   try {
                        ncRef.rebind( path, HelloRef );
                   } catch( org.omg.CosNaming.NamingContextPackage.NotFound nf ) {
                        NameComponent[] tmpName = new NameComponent[path.length-1];
                        for (int i=0; i < path.length-1; i++) { tmpName[i] = path; }
                        createContextPath(ncRef, tmpName);
                        ncRef.bind(path, HelloRef);
         BindingListHolder bl = new BindingListHolder();
         BindingIteratorHolder blIt= new BindingIteratorHolder();
         ncRef.list(1000, bl, blIt);
         Binding bindings[] = bl.value;
         for (int i=0; i < bindings.length; i++) {
         int lastIx = bindings[i].binding_name.length-1;
         // check to see if this is a naming context
         if (bindings[i].binding_type == BindingType.ncontext) {
         System.err.println( "Context: " +
         bindings[i].binding_name[lastIx].id);
         } else {
         System.err.println("Object: " +
         bindings[i].binding_name[lastIx].id);
                   System.out.println( name + " for INS ready and waiting ...");
                   // the server is now ready to receive the client request
                   orb.run();
              } catch (Exception e) {
                   System.err.println("ERROR: " + e);
                   //e.printStackTrace(System.out);
                   throw e;
              System.out.println("HelloServer Exiting ...");
    public static void createContextPath(NamingContext nc, NameComponent[] name)
         throws org.omg.CORBA.UserException {
         try {
              nc.bind_new_context(name);
         } catch (NotFound nf) {
              for( int len = name.length - nf.rest_of_name.length + 1;
                   len <= name.length; len++ )
                   NameComponent[] tmpName = new NameComponent[len];
                   for (int i=0; i < len; i++) { tmpName[i] = name[i]; }
                   nc.bind_new_context(tmpName);
    Client side:
    package oracle.demo.corba;
    import oraclecorba.Hello;
    import oraclecorba.HelloHelper;
    import org.omg.CORBA.ORB;
    import org.omg.CosNaming.Binding;
    import org.omg.CosNaming.BindingIteratorHolder;
    import org.omg.CosNaming.BindingListHolder;
    import org.omg.CosNaming.BindingType;
    import org.omg.CosNaming.NamingContextExt;
    import org.omg.CosNaming.NamingContextExtHelper;
    public class MyJSPHelper
         public static String jspSayHello(String in)
              String rc = "";
              try
                   ORB orb = ORB.init();
                   // get the root naming context
                   org.omg.CORBA.Object objRef;
                   objRef = orb.resolve_initial_references("NameService");
                   // Use NamingContextExt instead of NamingContext. This is
                   // part of the Interoperable naming Service.
                   NamingContextExt ncRef = NamingContextExtHelper.narrow(objRef);
                   /*for(int i =0; i<orb.list_initial_services().length; i++)
                        rc += orb.list_initial_services()+": ";
                        System.err.println(orb.list_initial_services()[i]);
         BindingListHolder bl = new BindingListHolder();
         BindingIteratorHolder blIt= new BindingIteratorHolder();
         ncRef.list(1000, bl, blIt);
         Binding bindings[] = bl.value;
         for (int i=0; i < bindings.length; i++) {
         int lastIx = bindings[i].binding_name.length-1;
         // check to see if this is a naming context
         if (bindings[i].binding_type == BindingType.ncontext) {
         System.err.println( "Context: " +
         bindings[i].binding_name[lastIx].id);
         } else {
         System.err.println("Object: " +
         bindings[i].binding_name[lastIx].id);
                   // resolve the Object Reference in Naming
                   String name = "Hello";
                   Hello helloImpl = HelloHelper.narrow(ncRef.resolve_str(name));
                   System.err.println("Obtained a handle on server object: " + helloImpl);
    //Hello helloImpl = HelloHelper.narrow(orb.string_to_object("corbaname:iiop:some_address:8056#Hello")); also tried that, but got the same problem
                   rc = helloImpl.sayHello(in); //<----failed here
              catch(Exception e)
                   // TODO Auto-generated catch block
                   rc += e.toString();
                   e.printStackTrace();
              return rc;
    Edited by: user8904224 on 27/04/2010 23:06

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    Regards,
    Pierre

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