Question

I have a very simple Java RMI Server that looks like the following:

    import java.rmi.*;     import java.rmi.server.*;      public class CalculatorImpl extends UnicastRemoteObject implements Calculator {          private String mServerName;          public CalculatorImpl(String serverName) throws RemoteException         {             super();             mServerName = serverName;         }          public int calculate(int op1, int op2) throws RemoteException         {             return op1 + op2;         }          public void exit() throws RemoteException         {             try{                 Naming.unbind(mServerName);                 System.out.println('CalculatorServer exiting.');             }             catch(Exception e){}              System.exit(1);         }          public static void main(String args[]) throws Exception         {             System.out.println('Initializing CalculatorServer.');              String serverObjName = 'rmi://localhost/Calculator';              Calculator calc = new CalculatorImpl(serverObjName);              Naming.rebind(serverObjName, calc);              System.out.println('CalculatorServer running.');         } } 

When I call the exit method, System.exit(1) throws the following exception:

CalculatorServer exiting. java.rmi.UnmarshalException: Error unmarshaling return header; nested exception is:         java.io.EOFException         at sun.rmi.transport.StreamRemoteCall.executeCall(StreamRemoteCall.java:203)         at sun.rmi.server.UnicastRef.invoke(UnicastRef.java:126)         at CalculatorImpl_Stub.exit(Unknown Source)         at CalculatorClient.<init>(CalculatorClient.java:17)         at CalculatorClient.main(CalculatorClient.java:29) Caused by: java.io.EOFException         at java.io.DataInputStream.readByte(DataInputStream.java:243)         at sun.rmi.transport.StreamRemoteCall.executeCall(StreamRemoteCall.java:189)         ... 4 more [2]+  Exit 1                  java CalculatorImpl 

What am I doing wrong in this method?

Answer 1

In case anyone is having a similar problem, I figured out the answer myself. Here is my exit() method:

public void exit() throws RemoteException {     try{         // Unregister ourself         Naming.unbind(mServerName);          // Unexport; this will also remove us from the RMI runtime         UnicastRemoteObject.unexportObject(this, true);          System.out.println('CalculatorServer exiting.');     }     catch(Exception e){} }