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RMI: ClassNotFoundException for STUB class

Hardik Raja
Ranch Hand

Joined: Feb 07, 2006
Posts: 117
Dear JavaRanchers,

I am trying to implement a simple RMI application; It compiles successfully but I get an exception during execution. From the exception excerpt (see highlighted part in COMPLETE EXCEPTION below) it seems that the stub class(Iward.Hri.Remote.RemoteNotifyImplementation_Stub) is not found, but I did include its path in the classpath (so I guess the JVM should be able to find it).

I am not able to figure out the cause of this exception.

Could anyone please provide some input on this?

***IMPORTANT NOTE***
Please find below the exception during runtime as well as the actual code for your reference.

Also I have created the stub/skeleton as follows,
C:\>rmic -vcompat Iward.Hri.Remote.RemoteNotifyImplementation

and Stubs and skeletons are generated properly and included in the classpath

Kind regards,
Hardik Raja




  • COMPLETE EXCEPTION

  • java.rmi.ServerException: RemoteException occurred in server thread; nested exception is:
    java.rmi.UnmarshalException: error unmarshalling arguments; nested exception is:
    java.lang.ClassNotFoundException: Iward.Hri.Remote.RemoteNotifyImplementation_Stub

    at sun.rmi.server.UnicastServerRef.oldDispatch(UnicastServerRef.java:396)
    at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:250)
    at sun.rmi.transport.Transport$1.run(Transport.java:159)
    at java.security.AccessController.doPrivileged(Native Method)
    at sun.rmi.transport.Transport.serviceCall(Transport.java:155)
    at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:535)
    at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(TCPTransport.java:790)
    at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:649)
    at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:885)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:907)
    at java.lang.Thread.run(Thread.java:619)
    at sun.rmi.transport.StreamRemoteCall.exceptionReceivedFromServer(StreamRemoteCall.java:255)
    at sun.rmi.transport.StreamRemoteCall.executeCall(StreamRemoteCall.java:233)
    at sun.rmi.server.UnicastRef.invoke(UnicastRef.java:359)
    at sun.rmi.registry.RegistryImpl_Stub.rebind(Unknown Source)
    at java.rmi.Naming.rebind(Naming.java:160)
    at Iward.Hri.Remote.RemoteNotifyImplementation.main(RemoteNotifyImplementation.java:36)
    Caused by: java.rmi.UnmarshalException: error unmarshalling arguments; nested exception is:
    java.lang.ClassNotFoundException: Iward.Hri.Remote.RemoteNotifyImplementation_Stub
    at sun.rmi.registry.RegistryImpl_Skel.dispatch(Unknown Source)
    at sun.rmi.server.UnicastServerRef.oldDispatch(UnicastServerRef.java:386)
    at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:250)
    at sun.rmi.transport.Transport$1.run(Transport.java:159)
    at java.security.AccessController.doPrivileged(Native Method)
    at sun.rmi.transport.Transport.serviceCall(Transport.java:155)
    at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:535)
    at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(TCPTransport.java:790)
    at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:649)
    at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:885)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:907)
    at java.lang.Thread.run(Thread.java:619)
    Caused by: java.lang.ClassNotFoundException: Iward.Hri.Remote.RemoteNotifyImplementation_Stub
    at java.net.URLClassLoader$1.run(URLClassLoader.java:200)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
    at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319)
    at java.lang.Class.forName0(Native Method)
    at java.lang.Class.forName(Class.java:247)
    at sun.rmi.server.LoaderHandler.loadClass(LoaderHandler.java:434)
    at sun.rmi.server.LoaderHandler.loadClass(LoaderHandler.java:165)
    at java.rmi.server.RMIClassLoader$2.loadClass(RMIClassLoader.java:620)
    at java.rmi.server.RMIClassLoader.loadClass(RMIClassLoader.java:247)
    at sun.rmi.server.MarshalInputStream.resolveClass(MarshalInputStream.java:197)
    at java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1575)
    at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1496)
    at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1732)
    at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329)
    at java.io.ObjectInputStream.readObject(ObjectInputStream.java:351)
    ... 12 more
    BUILD STOPPED (total time: 9 seconds)



  • INTERFACE : RemoteNotifyInterface.java




  • INTERFACE IMPLEMENTATION : RemoteNotifyImplementation.java

  • zul' Zorander
    Greenhorn

    Joined: Aug 12, 2009
    Posts: 21
    did you start the rmi registry???
    Vijitha Kumara
    Bartender

    Joined: Mar 24, 2008
    Posts: 3860

    Hardik Raja wrote:...
    Also I have created the stub/skeleton as follows,
    C:\>rmic -vcompat Iward.Hri.Remote.RemoteNotifyImplementation
    and Stubs and skeletons are generated properly and included in the classpath


    First of all, you don't need to generate stubs etc.. yourself. Which JDK are you using ?


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    subject: RMI: ClassNotFoundException for STUB class