3 Replies Latest reply on Jun 11, 2007 11:32 PM by Kevin Narushoff

    I am getting a strange class cast exception when doing a jn

    Richard Price Newbie

      I am trying to access the RMIAdaptor on a remote jboss server running 4.0.4. from a different 4.0.4 jboss server using the following code.

      import java.util.Hashtable;
      import java.util.Iterator;
      import java.util.Set;
      import javax.management.MBeanServerConnection;
      import javax.management.ObjectName;
      import javax.naming.Context;
      import javax.naming.InitialContext;

      import org.jboss.jmx.adaptor.rmi.RMIAdaptor;



      public class MBeanTester {

      /**
      * @param args
      */
      public static void main(String[] args) {
      // TODO Auto-generated method stub
      try{

      Hashtable env = new Hashtable();
      env.put(Context.INITIAL_CONTEXT_FACTORY, "org.jnp.interfaces.NamingContextFactory");
      env.put(Context.PROVIDER_URL, "jnp://localhost:1099");
      InitialContext ic = new InitialContext(env);
      RMIAdaptor server = (RMIAdaptor) ic.lookup("jmx/invoker/RMIAdaptor");





      Set name_set = null;
      ObjectName on = null;
      name_set = server.queryNames(new ObjectName("jboss.jca:service=ManagedConnectionPool,*"), null);

      if(name_set.isEmpty())
      System.out.println("no pools returned");


      for (Iterator it = name_set.iterator(); it.hasNext() ; ) {



      on = (ObjectName)it.next();

      String pool_name = on.toString();

      String status = server.getAttribute(on, "State").toString();
      System.out.println("Pool Name: " + pool_name + " , " + status);



      }// end for

      }catch(Exception e){
      e.printStackTrace();

      }

      //testConnectionList("1099", "localhost");
      }




      }

      When I run the app I am getting the following exception.

      java.lang.ClassCastException: org.jboss.invocation.InvokerInterceptor
      09:03:21,637 ERROR [STDERR] at org.jboss.proxy.Interceptor.readExternal(Interceptor.java:80)
      09:03:21,637 ERROR [STDERR] at java.io.ObjectInputStream.readExternalData(Unknown Source)
      09:03:21,652 ERROR [STDERR] at java.io.ObjectInputStream.readOrdinaryObject(Unknown Source)
      09:03:21,652 ERROR [STDERR] at java.io.ObjectInputStream.readObject0(Unknown Source)
      09:03:21,652 ERROR [STDERR] at java.io.ObjectInputStream.readObject(Unknown Source)
      09:03:21,652 ERROR [STDERR] at org.jboss.proxy.Interceptor.readExternal(Interceptor.java:80)
      09:03:21,652 ERROR [STDERR] at java.io.ObjectInputStream.readExternalData(Unknown Source)
      09:03:21,652 ERROR [STDERR] at java.io.ObjectInputStream.readOrdinaryObject(Unknown Source)
      09:03:21,652 ERROR [STDERR] at java.io.ObjectInputStream.readObject0(Unknown Source)
      09:03:21,652 ERROR [STDERR] at java.io.ObjectInputStream.readObject(Unknown Source)
      09:03:21,652 ERROR [STDERR] at org.jboss.proxy.Interceptor.readExternal(Interceptor.java:80)
      09:03:21,668 ERROR [STDERR] at java.io.ObjectInputStream.readExternalData(Unknown Source)
      09:03:21,668 ERROR [STDERR] at java.io.ObjectInputStream.readOrdinaryObject(Unknown Source)
      09:03:21,668 ERROR [STDERR] at java.io.ObjectInputStream.readObject0(Unknown Source)
      09:03:21,668 ERROR [STDERR] at java.io.ObjectInputStream.readObject(Unknown Source)
      09:03:21,668 ERROR [STDERR] at org.jboss.proxy.ClientContainer.readExternal(ClientContainer.java:156)
      09:03:21,668 ERROR [STDERR] at java.io.ObjectInputStream.readExternalData(Unknown Source)
      09:03:21,668 ERROR [STDERR] at java.io.ObjectInputStream.readOrdinaryObject(Unknown Source)
      09:03:21,668 ERROR [STDERR] at java.io.ObjectInputStream.readObject0(Unknown Source)
      09:03:21,668 ERROR [STDERR] at java.io.ObjectInputStream.defaultReadFields(Unknown Source)
      09:03:21,668 ERROR [STDERR] at java.io.ObjectInputStream.readSerialData(Unknown Source)
      09:03:21,668 ERROR [STDERR] at java.io.ObjectInputStream.readOrdinaryObject(Unknown Source)
      09:03:21,684 ERROR [STDERR] at java.io.ObjectInputStream.readObject0(Unknown Source)
      09:03:21,684 ERROR [STDERR] at java.io.ObjectInputStream.readObject(Unknown Source)
      09:03:21,684 ERROR [STDERR] at java.rmi.MarshalledObject.get(Unknown Source)
      09:03:21,684 ERROR [STDERR] at org.jnp.interfaces.MarshalledValuePair.get(MarshalledValuePair.java:72)
      09:03:21,684 ERROR [STDERR] at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:652)
      09:03:21,684 ERROR [STDERR] at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:587)
      09:03:21,684 ERROR [STDERR] at javax.naming.InitialContext.lookup(Unknown Source)
      09:03:21,684 ERROR [STDERR] at com.mig.prodverification.util.MBeanTester.main(MBeanTester.java:34)
      09:03:21,684 ERROR [STDERR] at com.mig.prodverification.TestInitializer.doPost(TestInitializer.java:48)
      09:03:21,684 ERROR [STDERR] at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
      09:03:21,684 ERROR [STDERR] at javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
      09:03:21,684 ERROR [STDERR] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
      09:03:21,684 ERROR [STDERR] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
      09:03:21,684 ERROR [STDERR] at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
      09:03:21,699 ERROR [STDERR] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
      09:03:21,699 ERROR [STDERR] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
      09:03:21,699 ERROR [STDERR] at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
      09:03:21,699 ERROR [STDERR] at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
      09:03:21,699 ERROR [STDERR] at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:175)
      09:03:21,699 ERROR [STDERR] at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:74)
      09:03:21,699 ERROR [STDERR] at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
      09:03:21,699 ERROR [STDERR] at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
      09:03:21,699 ERROR [STDERR] at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
      09:03:21,699 ERROR [STDERR] at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
      09:03:21,699 ERROR [STDERR] at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:869)
      09:03:21,699 ERROR [STDERR] at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:664)
      09:03:21,715 ERROR [STDERR] at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
      09:03:21,715 ERROR [STDERR] at org.apache.tomcat.util.net.MasterSlaveWorkerThread.run(MasterSlaveWorkerThread.java:112)
      09:03:21,715 ERROR [STDERR] at java.lang.Thread.run(Unknown Source)

      I when I change the code to cast the returned lookup value as a plain old Object I get the same error message. Which does not make sense since everything should be able to be casted to the raw Object type.

      However, when I take out the env hashmap and do a local lookup the code works fine.

      InitialContext ic = new InitialContext();
      RMIAdaptor server = (RMIAdaptor) ic.lookup("jmx/invoker/RMIAdaptor");

      There is somthing not working with a remote lookup.

      Does anyone know if I do not have something on jboss configured correctly or what the problem is?