I'm having a problem restarting my RMI registry after it has been stopped:
import java.rmi.*;
import java.rmi.registry.*;
import java.rmi.server.UnicastRemoteObject;
import javax.swing.JOptionPane;
public class CinemaServer
{
private Registry registry;
ClientImpl clientImple; //remote interface implemented class
private static String title="Cinema Pvt Ltd";
public CinemaServer() {
try {
clientImple = new ClientImpl();
registry=LocateRegistry.createRegistry(3311);
registry.rebind("RMI_INSTANCE", clientImple);
} catch (RemoteException e) {
JOptionPane.showMessageDialog(null, "Can't Start RMI Server",title,JOptionPane.ERROR_MESSAGE);
}
}
public void stopServer()
{
try {
registry.unbind("RMI_INSTANCE");
UnicastRemoteObject.unexportObject(clientImple, true);
} catch (NotBoundException e) {
JOptionPane.showMessageDialog(null, "Can't Stop Server",title,JOptionPane.ERROR_MESSAGE);
}
}
}
I start the server with: CinemaServer ser=new CinemaServer();
And when I call ser.stopServer();
it stops.
But I cannot restart it
I'm getting:
java.rmi.server.ExportException: internal error: ObjID already in use
at sun.rmi.transport.ObjectTable.putTarget(Unknown Source)
at sun.rmi.transport.Transport.exportObject(Unknown Source)
at sun.rmi.transport.tcp.TCPTransport.exportObject(Unknown Source)
at sun.rmi.transport.tcp.TCPEndpoint.exportObject(Unknown Source)
at sun.rmi.transport.LiveRef.exportObject(Unknown Source)
...
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RMI stands for Remote Method Invocation. It is a mechanism that allows an object residing in one system (JVM) to access/invoke an object running on another JVM. RMI is used to build distributed applications; it provides remote communication between Java programs. It is provided in the package java.
the call is failing on createRegistry()
, not on re-exporting your object. don't create the registry twice.
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