1 Reply Latest reply on Apr 18, 2005 2:45 PM by Daniel Murygin

    ejb client -  Failed to find method for hash etc

    Iain Toft Newbie

      Hi,
      I'm having some problems running a simple ejb client program.
      JBoss: 4.0.0
      Red Hat Linux 7.x, Linux 2.4.19 (i386)

      We receive the following output...

      Obtained JNDI Context...
      Obtained Object Reference...
      Exception in thread "main" java.lang.IllegalStateException:
      Failed to find method for hash:6090549741276665905 available mappings:
      {4121927297169232143=public abstract void javax.ejb.EJBHome.remove(javax.ejb.Handle)
      throws java.rmi.RemoteException,javax.ejb.RemoveException, -8220990928542008427=public abstract itmp.interest.InterestRemote
      itmp.interest.InterestRemoteHome.create() throws java.rmi.RemoteException,javax.ejb.CreateException,
      -7423251857241384719=public abstract void javax.ejb.EJBHome.remove(java.lang.Object) throws java.rmi.RemoteException,
      javax.ejb.RemoveException, 7415355246179212884=public abstract boolean javax.ejb.EJBObject.isIdentical(javax.ejb.EJBObject)
      throws java.rmi.RemoteException, 8981122088959051067=public abstract javax.ejb.HomeHandle javax.ejb.EJBHome.getHomeHandle()
      throws java.rmi.RemoteException, -1225864925247205563=public abstract void javax.ejb.EJBObject.remove()
      throws java.rmi.RemoteException,javax.ejb.RemoveException, -883843542736932254=public abstract java.lang.Object
      javax.ejb.EJBObject.getPrimaryKey() throws java.rmi.RemoteException, 4512095171315154818=public abstract
      javax.ejb.EJBHome javax.ejb.EJBObject.getEJBHome() throws java.rmi.RemoteException, 3781219857755091396=public
      abstract javax.ejb.EJBMetaData javax.ejb.EJBHome.getEJBMetaData() throws java.rmi.RemoteException, -3260590760910195779=
      public abstract javax.ejb.Handle javax.ejb.EJBObject.getHandle() throws java.rmi.RemoteException, -8289334516425189948=
      public abstract double itmp.interest.InterestRemote.calculateCompoundInterest(double,double,double)
      throws java.rmi.RemoteException, 8594593460157411074=public abstract javax.ejb.EJBObject javax.ejb.Handle.getEJBObject()
      throws java.rmi.RemoteException} at org.jboss.invocation.MarshalledInvocation.getMethod(MarshalledInvocation.java:297)
      
      at org.jboss.ejb.Container.invoke(Container.java:852)
      at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
      at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
      at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
      at java.lang.reflect.Method.invoke(Method.java:324)
      at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:141)
      at org.jboss.mx.server.Invocation.dispatch(Invocation.java:80)
      at org.jboss.mx.server.Invocation.invoke(Invocation.java:72)
      at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:242)
      at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:642)
      at org.jboss.invocation.jrmp.server.JRMPInvoker$MBeanServerAction.invoke(JRMPInvoker.java:775)
      at org.jboss.invocation.jrmp.server.JRMPInvoker.invoke(JRMPInvoker.java:382)
      at sun.reflect.GeneratedMethodAccessor97.invoke(Unknown Source)
      at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
      at java.lang.reflect.Method.invoke(Method.java:324)
      at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:261)
      at sun.rmi.transport.Transport$1.run(Transport.java:148)
      at java.security.AccessController.doPrivileged(Native Method)
      at sun.rmi.transport.Transport.serviceCall(Transport.java:144)
      at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:460)
      at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:701)
      at java.lang.Thread.run(Thread.java:534)
      at sun.rmi.transport.StreamRemoteCall.exceptionReceivedFromServer(StreamRemoteCall.java:247)
      at sun.rmi.transport.StreamRemoteCall.executeCall(StreamRemoteCall.java:223)
      at sun.rmi.server.UnicastRef.invoke(UnicastRef.java:133)
      at org.jboss.invocation.jrmp.server.JRMPInvoker_Stub.invoke(Unknown Source)
      at org.jboss.invocation.jrmp.interfaces.JRMPInvokerProxy.invoke(JRMPInvokerProxy.java:118)
      at org.jboss.invocation.InvokerInterceptor.invoke(InvokerInterceptor.java:96)
      at org.jboss.proxy.TransactionInterceptor.invoke(TransactionInterceptor.java:46)
      at org.jboss.proxy.SecurityInterceptor.invoke(SecurityInterceptor.java:55)
      at org.jboss.proxy.ejb.StatelessSessionInterceptor.invoke(StatelessSessionInterceptor.java:97)
      at org.jboss.proxy.ClientContainer.invoke(ClientContainer.java:86)
      at $Proxy1.foo(Unknown Source)
      at InterestClient.main(InterestClient.java:46)
      


      occurs when running the client

      import java.rmi.RemoteException;
      import java.util.Hashtable;
      
      import javax.ejb.CreateException;
      import javax.naming.InitialContext;
      import javax.naming.NamingException;
      import javax.rmi.PortableRemoteObject;
      
      import itmp.interest.*;
      
      class InterestClient
      {
      public static void main(String[] args)
      {
      System.setProperty("java.naming.factory.initial", "org.jnp.interfaces.NamingContextFactory");
      System.setProperty("java.naming.provider.url", "localhost:1099");
      
      Object reference = null;
      
      try
      {
      InitialContext jndiContext = new InitialContext();
      
      System.out.println("Obtained JNDI Context...");
      
      reference = jndiContext.lookup("itmp/Interest");
      
      System.out.println("Obtained Object Reference...");
      }
      catch(NamingException e)
      {
      e.printStackTrace();
      }
      
      InterestRemoteHome home = (InterestRemoteHome)
      PortableRemoteObject.narrow (reference, InterestRemoteHome.class);
      
      double answer = Double.NaN;
      String feedback = null;
      
      try
      {
      InterestRemote interest = home.create();
      
      answer = interest.calculateCompoundInterest (1000, 0.10, 2);
      feedback = interest.foo("Feedback String");
      }
      catch(CreateException e)
      {
      e.printStackTrace();
      }
      catch(RemoteException e)
      {
      e.printStackTrace();
      }
      
      System.out.println ("Interest on 1000 units, at 10% per period, compounded over 2 periods is:");
      System.out.println (answer);
      System.out.println (feedback);
      }
      }
      


      The bean classes and remote interfaces are

      Bean Class
      package itmp.interest;
      
      import java.rmi.RemoteException;
      
      import javax.ejb.SessionBean;
      import javax.ejb.SessionContext;
      
      public class InterestBean implements SessionBean
      {
      public void ejbCreate() {}
      
      public double calculateCompoundInterest(double principle, double rate, double periods)
      {
      System.out.println ("itmp.interest.calculateCompoundInterest()");
      
      return principle * Math.pow(1 + rate, periods) - principle;
      }
      
      public String foo(String s)
      {
      return s;
      }
      
      public void ejbPassivate() {}
      public void ejbActivate() {}
      public void ejbRemove() {}
      
      public void setSessionContext(SessionContext ctx) {}
      }
      

      Remote Home Interface

      package itmp.interest;
      
      import java.rmi.RemoteException;
      
      import javax.ejb.CreateException;
      import javax.ejb.EJBHome;
      
      public interface InterestRemoteHome extends EJBHome
      {
      public InterestRemote create() throws RemoteException, CreateException;
      }
      


      Remote Object Interface
      package itmp.interest;
      
      import java.rmi.RemoteException;
      
      import javax.ejb.EJBObject;
      
      public interface InterestRemote extends EJBObject
      {
      public double calculateCompoundInterest(double principle, double rate, double periods) throws RemoteException;
      
      public String foo(String s) throws RemoteException;
      }
      



      The deployment descriptors...

      ejb-jar.xml
      <?xml version="1.0" encoding="UTF-8"?>
      
      <!DOCTYPE ejb-jar PUBLIC "-//Sun Microsystems, Inc.//DTD Enterprise JavaBeans 2.0//EN" "http://java.sun.com/dtd/ejb-jar_2_0.dtd">
      
      <ejb-jar>
       <enterprise-beans>
      
       <session>
       <ejb-name>InterestBean</ejb-name>
       <home>itmp.interest.InterestRemoteHome</home>
       <remote>itmp.interest.InterestRemote</remote>
       <ejb-class>itmp.interest.InterestBean</ejb-class>
       <session-type>Stateless</session-type>
       <transaction-type>Container</transaction-type>
       </session>
      
       <entity>
       <ejb-name>ShipBean</ejb-name>
       <home>itmp.ship.ShipHomeRemote</home>
       <remote>itmp.ship.ShipRemote</remote>
       <local-home>itmp.ship.ShipHomeLocal</local-home>
       <local>itmp.ship.ShipLocal</local>
       <ejb-class>itmp.ship.ShipBean</ejb-class>
       <persistence-type>Container</persistence-type>
       <prim-key-class>java.lang.Integer</prim-key-class>
       <reentrant>False</reentrant>
       <abstract-schema-name>Ship</abstract-schema-name>
      
       <cmp-field><field-name>pk</field-name></cmp-field>
       <cmp-field><field-name>name</field-name></cmp-field>
      
       <primkey-field>pk</primkey-field>
       </entity>
      
       </enterprise-beans>
      </ejb-jar>
      


      jboss.xml

      <?xml version="1.0" encoding="UTF-8"?>
      
      <!DOCTYPE jboss PUBLIC "-//JBoss//DTD JBOSS//EN" "http://www.jboss.org/j2ee/dtd/jboss.dtd">
      
      <jboss>
       <enterprise-beans>
      
       <session>
       <ejb-name>InterestBean</ejb-name>
       <jndi-name>itmp/Interest</jndi-name>
       </session>
      
       <entity>
       <ejb-name>ShipBean</ejb-name>
       <jndi-name>itmp/Ship</jndi-name>
       </entity>
      
       </enterprise-beans>
      </jboss>
      


      jbosscmp-jdbc.xml

      <?xml version="1.0" encoding="UTF-8"?>
      
      <!DOCTYPE jbosscmp-jdbc PUBLIC "-//Jboss//DTD JBOSSCMP-JDBC 4.0//EN" "http://www.jboss.org/j2ee/dtd/jbosscmp-jdbc_4_0.dtd">
      
      <jbosscmp-jdbc>
       <enterprise-beans>
      
       <entity>
       <ejb-name>ShipBean</ejb-name>
       <table-name>ITMP_SHIP</table-name>
      
       <cmp-field>
       <field-name>pk</field-name>
       <column-name>PK</column-name>
       </cmp-field>
      
       <cmp-field>
       <field-name>name</field-name>
       <column-name>NAME</column-name>
       </cmp-field>
      
      </entity>
      
       </enterprise-beans>
      </jbosscmp-jdbc>
      


      The ShipBean is working fine its included in the deployment descriptors for completeness, the same problem has been isolated without the ship bean. Interestingly the following lines appear in the log.

      2004-10-28 17:30:14,442 DEBUG [org.jboss.ejb.StatelessSessionContainer] Creating jboss.j2ee:jndiName=itmp/Interest,service=EJB
      2004-10-28 17:30:14,443 DEBUG [org.jboss.ejb.StatelessSessionContainer] Mapped calculateCompoundInterest HASH 1715638511 to
      public double itmp.interest.InterestBean.calculateCompoundInterest(double,double,double)
      2004-10-28 17:30:14,443 DEBUG [org.jboss.ejb.StatelessSessionContainer] Mapped Container method remove HASH -1842617161
      2004-10-28 17:30:14,443 DEBUG [org.jboss.ejb.StatelessSessionContainer] Mapped Container method getHandle HASH 1182305581
      2004-10-28 17:30:14,444 DEBUG [org.jboss.ejb.StatelessSessionContainer] Mapped Container method getEJBHome HASH -993218923
      2004-10-28 17:30:14,444 DEBUG [org.jboss.ejb.StatelessSessionContainer] Mapped Container method getPrimaryKey HASH -131865408
      2004-10-28 17:30:14,444 DEBUG [org.jboss.ejb.StatelessSessionContainer] Mapped Container method isIdentical HASH 285457048
      2004-10-28 17:30:14,444 DEBUG [org.jboss.ejb.StatelessSessionContainer] Mapping create
      2004-10-28 17:30:14,444 DEBUG [org.jboss.ejb.StatelessSessionContainer] Mapping remove
      2004-10-28 17:30:14,444 DEBUG [org.jboss.ejb.StatelessSessionContainer] Mapping remove
      2004-10-28 17:30:14,444 DEBUG [org.jboss.ejb.StatelessSessionContainer] Mapping getEJBMetaData
      2004-10-28 17:30:14,444 DEBUG [org.jboss.ejb.StatelessSessionContainer] Mapping getHomeHandle
      


      It appears the container doesn't map the 'public String foo(String s)' method and fails as a result during invocation by the client. This problem has occured several times with different package names, method names from different jar's (we are in a classroom environment).
      Any ideas why foo isn't mapped by the container?

      Thanks in advance,
      Iain