How to interpret rmi log msgs when setting -Djava.rmi.server.logCalls=true

i have set this property: -Djava.rmi.server.logCalls=true
now i am getting the following rmi log msgs on the console:
Tue Nov 12 15:38:08 PST 2002:RMI:RMI TCP Connection(4851)-172.16.103.94:[172.16.103.94: sun.rmi.transport.DGCImpl[0:0:0, 2]: java.rmi.dgc.Lease dirty(java.rmi.server.ObjID[], long, java.rmi.dgc.Lease)]
Tue Nov 12 15:38:13 PST 2002:RMI:RMI TCP Connection(4852)-127.0.0.1:[127.0.0.1: sun.rmi.registry.RegistryImpl[0:0:0, 0]: java.rmi.Remote lookup(java.lang.String)]
Tue Nov 12 15:38:20 PST 2002:RMI:RMI TCP Connection(4853)-172.16.103.94:[172.16.103.94: sun.rmi.transport.DGCImpl[0:0:0, 2]: void clean(java.rmi.server.ObjID[], long,java.rmi.dgc.VMID, boolean)]
can some one pls tell me know to interpret the messages, what does the number 4853 in TCP Connection(4853) mean ? thanks a lot

Basically it is:
date:subsystem:threadid:[remote object[object-id]:method]The 4853 is part of the thread-id and it is something like an instance number of the thread class.
EJP

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This requirement is due to updation of an already running system, with stubs to a new version without stubs, without shutting down the system.
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package example.hello;
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package example.hello;
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package example.hello;
import java.rmi.registry.LocateRegistry;
import java.rmi.registry.Registry;
public class Client {
private Client() {}
public static void main(String[] args) {
String host = (args.length < 1) ? null : args[0];
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System.out.println("response: " + response);
} catch (Exception e) {
System.err.println("Client exception: " + e.toString());
e.printStackTrace();
First I run file Server.java using the following script (server.bat)
java -Djava.rmi.server.ignoreStubClasses=true -classpath .; example.hello.Server
pause
Then the client is run using the following script (client.bat)
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pause
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java.rmi.UnmarshalException: skeleton class not found but required for client version
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java.rmi.UnmarshalException: error unmarshalling call header; nested exception is:
java.rmi.UnmarshalException: skeleton class not found but required for client version
at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:325)
at sun.rmi.transport.Transport$1.run(Transport.java:153)
at java.security.AccessController.doPrivileged(Native Method)
at sun.rmi.transport.Transport.serviceCall(Transport.java:149)
at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:460)
at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:701)
at java.lang.Thread.run(Thread.java:595)
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:343)
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at example.hello.Client.main(Client.java:52)
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java.rmi.UnmarshalException: skeleton class not found but required for client version
at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:250)
at sun.rmi.transport.Transport$1.run(Transport.java:153)
at java.security.AccessController.doPrivileged(Native Method)
at sun.rmi.transport.Transport.serviceCall(Transport.java:149)
at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:460)
at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:701)
at java.lang.Thread.run(Thread.java:595)
Caused by: java.rmi.UnmarshalException: skeleton class not found but required for client version
at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:243)
... 6 more
I am not able to figure out why this thing is happening, If i also set the property java.rmi.server.ignoreStubClasses=true on the client side everything goes fine. But this I can't do. I can't set the property on the client side as the system is up and already running.
I am using JDK version 1.5.0_06. Same exception comes under JDK 6.0
Any help will be highly appreciated.

I think this is a bug. When you exported the Registry from your server JVM it was also exported with java.rmi.server.ignoreStubClasses=true, but the Registry bootstrap at the client requires the 1.1 stub protocol for compatiblity reasons so you got this error. I would report this on the Bug Parade.
You could get around it by setting java.rmi.server.ignoreStubClasses after exporting the Registry.
BTW java.rmi.server.ignoreStubClasses isn't supposed to do anything at the client whether true or false so you can cut your testing space in half.

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How to interpret rmi log msgs when setting -Djava.rmi.server.logCalls=true

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