Re: RMI on HP-UX - application closes after bind
Nigel Wade napisal(a):
Krystian wrote:
Tris Orendorff napisal(a):
"Krystian" <k.szczesny@gmail.com> burped up warm pablum in
news:1165229937.927937.75780@73g2000cwn.googlegroups.com:
Hi,
I've got a simple test application of RMI. It's a copy of PerfectTime
application from Thinking in Enterprise Java by Bruce Eckel. I've used
it to test RMI on windows.
Now i've copied it to HP-UX. When i run it, everything seems to be ok,
accept the fact, that after the bind to RMI, applications simply
closes.
On windows it waits for new connections.
I will paste only the last few lines from the main class:
PerfectTime pt = new PerfectTime();
Naming.bind("//localhost/PerfectTime", pt);
System.out.println("Ready to do time");
}
} ///:~
Is there something missing?
Yes! Show us the exception message.just before it closes.
--
Tris Orendorff
[Q: What kind of modem did Jimi Hendrix use?
A: A purple Hayes.]
`
There is no exception, no error.
It just closes!
Your application will exit if there is an exception which isn't caught, or your
code naturally exits. You need to determine which one is happening here.
Rmiregistry still has the bind, because when i do Naming.list i get my
entry /but the application is already closed/.
I just don't know why it closes itself after the bind :/
You have most likely caught the exception and ignored it. Without any code to
examine it's not possible to do anything other than speculate.
I will paste the whole code. It's mostly taken from Chapter 15 of
"Thinking in Enterprise Java" by Bruce Eckel which is available for
free on: http://www.mindview.net/Books
I hope he won't mind.
Here's the interface for rmi:
PerfectTimeI.java:
package c15.rmi;
import java.rmi.*;
public interface PerfectTimeI extends Remote {
long getPerfectTime() throws RemoteException;
}
Server code:
PerfectTime.java:
package c15.rmi;
import java.rmi.*;
import java.rmi.server.*;
public class PerfectTime
extends UnicastRemoteObject
implements PerfectTimeI {
/**
*
*/
private static final long serialVersionUID = 5081148916046413493L;
// Implementation of the interface:
public long getPerfectTime()
throws RemoteException {
return System.currentTimeMillis();
}
// Must implement constructor
// to throw RemoteException:
public PerfectTime() throws RemoteException {
// super(); // Called automatically
}
// Registration for RMI serving. Throw
// exceptions out to the console.
public static void main(String[] args)
throws Exception {
System.setSecurityManager(
new RMISecurityManager());
PerfectTime pt = new PerfectTime();
Naming.rebind(args[0], pt);
System.out.println("Ready to do time");
}
}
Client code:
package c15.rmi;
import java.rmi.*;
public class DisplayPerfectTime {
public static void main(String[] args)
throws Exception {
System.setSecurityManager(
new RMISecurityManager());
PerfectTimeI t =
(PerfectTimeI)Naming.lookup(
args[0]);
for(int i = 0; i < 10; i++)
System.out.println("//localhost/Perfect time = " +
t.getPerfectTime());
}
}
policy:
moje.policy:
grant { permission java.security.AllPermission; };
How i do it:
rmiregistry &
java -Djava.security.policy=moje.policy -Djava.rmi.server.codebase=file:/app/user/szckcenz/java/c15.rmi.jar -cp ./c15.rmi.jar c15.rmi.PerfectTime //localhost/PT
java -Djava.security.policy=moje.policy -cp /app/user/szckcenz/java/c15.rmi.jar c15.rmi.DisplayPerfectTime //localhost/PT
When i start the server, it binds to the rmiregistry and exits /without
any error or exception - as You can see i don't catch any/
When i start the client i get:
Exception in thread "main" java.rmi.ConnectException: Connection
refused to host
: 10.13.221.43; nested exception is:
java.net.ConnectException: Connection timed out
at
sun.rmi.transport.tcp.TCPEndpoint.newSocket(TCPEndpoint.java:567)
at
sun.rmi.transport.tcp.TCPChannel.createConnection(TCPChannel.java:185
)
file moje.policy is in the directory from which i run app. Without
specifying it, it even won't start the server.
On windows it works just fine :/
Best regards,
Krystian