RMI server with IP Addres

In my application I am using RMI for evio of watchful and messages among pcs, when to the pc I give them a fixed ip the system it works correctly, but when changing the configuration of the pc that you/they obtain an aleatory ip it generates the following exception
java.rmi.ConnectException: Connection refused to host:: cmendoza ; nested exception is:
     java.net.ConnectException: Connection timed out: connect
     at sun.rmi.transport.tcp.TCPEndpoint.newSocket(Unknown Source)
     at sun.rmi.transport.tcp.TCPChannel.createConnection(Unknown Source)
     at sun.rmi.transport.tcp.TCPChannel.newConnection(Unknown Source)
     at sun.rmi.server.UnicastRef.invoke(Unknown Source)
     at java.rmi.server.RemoteObjectInvocationHandler.invokeRemoteMethod(Unknown Source)
     at java.rmi.server.RemoteObjectInvocationHandler.invoke(Unknown Source)
That I should make to solve this problem:

Similar Messages

One RMI server with 2 different clients

I have an RMI server which implements 2 different remote interfaces (call them InterfaceA and InterfaceB).
I then have 2 client programs, ClientA and ClientB, each using their respective interface.
When I try to run ClientA, I get a ClassDefNotFound exception for InterfaceB - which CientA never references.
I'm thinking it is because there is only one Stub class for the server, meaning it has info on InterfaceA and InterfaceB.
My questions are:
Is it possible to make 2 seperate stub classes from one implementation class?, one for each interface?
If not, is there some other way I can do this setup?

Why not have two classes on the server:
ClassA implements interfaceA
ClassB implements interfaceB
and bind both
objectA (instance of ClassA) for clientA, and
objectB (instance of classB) for clientB.

Can't start RMI server using JAR file

I found it interesting that if I start my RMI server from
a plain directory, everything goes fine.
But if I jar all these necessary files into a jar file,
and start my RMI server with command below
java -jar server.jar
UnmarshalException and ClassNotFoundException are
thrown to indecate that my stub class can't be found
(which I'm sure my stub class is in jar file)
Why is jar file so special that it can't act like
what it originally does when it hasn't been jared?
or I really should take care of some configuration
before I really can run a jar file?
thanks

To clarify few things...
What I don't understand is that when I convert all my
directories and class files properly into the jar file, they
just can't work properly.
I don't know if it's a problem of JAR file,
or it's RMI that make this JAR file special?
I'll simulate my JAR file structure that listed below,
these structure works fine when they have'nt been
converted into JAR file.
META-INF/
META-INF/MANIFEST.MF
a/b/x1.class
a/b/x2.class
a/b/c/Y.class
a/b/c/Y_Skel.class
a/b/c/Y_Stub.class
And when I use command "java -jar server.jar"
to run my application, ClassNotFound exception
is thrown to indecate my stub class is not found.
Is there anything I can do to correct this?
thanks

RMI server doesn't reliably start

I have a simple RMI server with one object that has one method:
public interface Foo extends Remote {
      // the Blah class is Serializable
      java.util.ArrayList <Blah> getListOfBlahs (String name);
public class FooImpl impelments Foo {
    java.util.ArrayLIst <Blah> getListOfBlahs (String name) {
             // Do whatever...
}My server is pretty simple at the moment and looks like this:
    public static void main (String [] args) {
        try {
            Foo stub = (Foo)UnicastRemoteObject.exportObject (new FooImpl(), 0);
            Registry registry = LocateRegistry.getRegistry();
            try {
                registry.unbind ("foo");
            } catch (NotBoundException ex) {
                System.out.println ("the thing isn't bound at the moment");
            registry.bind ("foo", stub);
            System.out.println ("Server Ready.....");
        } catch (RemoteException rmi) {
            rmi.printStackTrace ();
        } catch (AlreadyBoundException ex) {
            ex.printStackTrace ();
    }The problem is that sometimes when I start it, it promptly dies again with no error messages.
A couple things:
1) The server runs on a Fedora Core 8 machine, and the firewall is shutdown.
2) Before I run the server, I make sure to start the rmiregistry.
Usually I have to start the server a few times before the process doesn't just die again.
My hypothesis is that it's trying (unsuccessfully) to bind my Foo class to a port that is in use, but why don't I get an error?
Are there other log files to look at? Maybe in /var/log somewhere?
Thanks
-matthew
Edited by: matthew on Aug 29, 2008 1:11 PM

Yep.
After making some static references to the remote objects, the server starts and stays running:
class Server {
   private static FooImpl foo;
    public static void main (String [] args) {
        try {
            foo = new FooImpl ();
            Foo stub = (Foo)UnicastRemoteObject.exportObject (foo, 0);
            Registry registry = LocateRegistry.getRegistry();
            try {
                registry.unbind ("foo");
            } catch (NotBoundException ex) {
                System.out.println ("the thing isn't bound at the moment");
            registry.bind ("foo", stub);
            System.out.println ("Server Ready.....");
        } catch (RemoteException rmi) {
            rmi.printStackTrace ();
        } catch (AlreadyBoundException ex) {
            ex.printStackTrace ();
}-matthew

Option '-Djava.rmi.server.hostname' unnecessary?

In this tutorial:
http://java.sun.com/docs/books/tutorial/rmi/running.html
you start the rmi server with:
java -Djava.rmi.server.codebase=file:/c:\home\ann\public_html\classes/
-Djava.rmi.server.hostname=zaphod.east.sun.com
-Djava.security.policy=java.policy
engine.ComputeEngine
but in this tutorial:
http://java.sun.com/j2se/1.4.2/docs/guide/rmi/getstart.doc.html#5321
you start it without the Djava.rmi.server.hostname option:
java -Djava.rmi.server.codebase=http://myhost/~myusrname/myclasses/ -Djava.security.policy=$HOME/mysrc/policy examples.hello.HelloImpl
I have also tried to omit the hostname option from the first tutorial and it works fine..
Why is it not necessary to specify the Djava.rmi.server.hostname option to make the examples work?
What is the function of this option?

It's only necessary if you have a fouled-up DNS which doesn't give the right hostname by default.
And if Sun had understood the TCP weak-end model better than they did in 1996 it wouldn't be necessary at all.

Bug with RMI server under Unix

I have a server/client apps, and it work under Windows but not under Unix.
With Unix i have an exception :
java.rmi.ConnectException: Connection refused to host: 127.0.0.1; nested exception is:
java.net.ConnectException: Connection refused
java.net.ConnectException: Connection refused
at java.net.PlainSocketImpl.socketConnect(Native Method)
at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:350)
at java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:137)
at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:124)
at java.net.Socket.<init>(Socket.java:268)
at java.net.Socket.<init>(Socket.java:95)
at sun.rmi.transport.proxy.RMIDirectSocketFactory.createSocket(RMIDirectSocketFactory.java:20)
at sun.rmi.transport.proxy.RMIMasterSocketFactory.createSocket(RMIMasterSocketFactory.java:115)
at sun.rmi.transport.tcp.TCPEndpoint.newSocket(TCPEndpoint.java:494)
at sun.rmi.transport.tcp.TCPChannel.createConnection(TCPChannel.java:185)
at sun.rmi.transport.tcp.TCPChannel.newConnection(TCPChannel.java:169)
at sun.rmi.server.UnicastRef.invoke(UnicastRef.java:78)
at ServeurChatImpl_Stub.connect(Unknown Source)
at ClientDistantImpl.main(ClientDistantImpl.java:85)
Why?

Your question is very vague. Are you running the client and the server on the same machine or not at least it seems so. Are you using UnicastRemoteObject, RemoteObject or Activatable for extension. Also post some of your code and settings only then would somebody be able to help u.

RMI server causes the system to slow down and crash with socketException

Hi,
My RMI server application is a simple rmi server which invokes a JNI method once when I invoke through my client application. Server is left as it is after invoking the JNI method. After around 12 hours, server stops running with the following exception
ZoneInfo: C:\Program Files\Java\jre1.6.0\lib\zi\ZoneInfoMappi
ngs (Insufficient system resources exist to complete the requested service)
ZoneInfo: C:\Program Files\Java\jre1.6.0\lib\zi\ZoneInfoMappings (Insufficient s
ystem resources exist to complete the requested service)
Dec 29, 2008 10:09:34 AM sun.rmi.transport.tcp.TCPTransport$AcceptLoop executeAc
ceptLoop
WARNING: RMI TCP Accept-0: accept loop for ServerSocket[addr=0.0.0.0/0.0.0.0,por
t=0,localport=2161] throws
java.net.SocketException: socket closed
at java.net.PlainSocketImpl.socketAccept(Native Method)
at java.net.PlainSocketImpl.accept(Unknown Source)
at java.net.ServerSocket.implAccept(Unknown Source)
at java.net.ServerSocket.accept(Unknown Source)
at sun.rmi.transport.tcp.TCPTransport$AcceptLoop.executeAcceptLoop(Unkno
wn Source)
at sun.rmi.transport.tcp.TCPTransport$AcceptLoop.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Dec 29, 2008 10:10:35 AM sun.rmi.transport.tcp.TCPTransport$AcceptLoop executeAc
ceptLoop
WARNING: RMI TCP Accept-0: accept loop for ServerSocket[addr=0.0.0.0/0.0.0.0,por
t=0,localport=2161] throws
java.net.SocketException: socket closed
at java.net.PlainSocketImpl.socketAccept(Native Method)
at java.net.PlainSocketImpl.accept(Unknown Source)
at java.net.ServerSocket.implAccept(Unknown Source)
at java.net.ServerSocket.accept(Unknown Source)
at sun.rmi.transport.tcp.TCPTransport$AcceptLoop.executeAcceptLoop(Unkno
wn Source)
at sun.rmi.transport.tcp.TCPTransport$AcceptLoop.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Dec 29, 2008 10:12:36 AM sun.rmi.transport.tcp.TCPTransport$AcceptLoop executeAc
ceptLoop
WARNING: RMI TCP Accept-0: accept loop for ServerSocket[addr=0.0.0.0/0.0.0.0,por
t=0,localport=2161] throws
java.net.SocketException: socket closed
at java.net.PlainSocketImpl.socketAccept(Native Method)
at java.net.PlainSocketImpl.accept(Unknown Source)
at java.net.ServerSocket.implAccept(Unknown Source)
at java.net.ServerSocket.accept(Unknown Source)
at sun.rmi.transport.tcp.TCPTransport$AcceptLoop.executeAcceptLoop(Unkno
wn Source)
at sun.rmi.transport.tcp.TCPTransport$AcceptLoop.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Dec 29, 2008 10:15:37 AM sun.rmi.transport.tcp.TCPTransport$AcceptLoop executeAc
ceptLoop
WARNING: RMI TCP Accept-0: accept loop for ServerSocket[addr=0.0.0.0/0.0.0.0,por
t=0,localport=2161] throws
java.net.SocketException: socket closed
at java.net.PlainSocketImpl.socketAccept(Native Method)
at java.net.PlainSocketImpl.accept(Unknown Source)
at java.net.ServerSocket.implAccept(Unknown Source)
at java.net.ServerSocket.accept(Unknown Source)
at sun.rmi.transport.tcp.TCPTransport$AcceptLoop.executeAcceptLoop(Unkno
wn Source)
at sun.rmi.transport.tcp.TCPTransport$AcceptLoop.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Dec 29, 2008 10:20:40 AM sun.rmi.transport.tcp.TCPTransport$AcceptLoop executeAc
ceptLoop
WARNING: RMI TCP Accept-0: accept loop for ServerSocket[addr=0.0.0.0/0.0.0.0,por
t=0,localport=2161] throws
java.net.SocketException: socket closed
at java.net.PlainSocketImpl.socketAccept(Native Method)
at java.net.PlainSocketImpl.accept(Unknown Source)
at java.net.ServerSocket.implAccept(Unknown Source)
at java.net.ServerSocket.accept(Unknown Source)
at sun.rmi.transport.tcp.TCPTransport$AcceptLoop.executeAcceptLoop(Unkno
wn Source)
at sun.rmi.transport.tcp.TCPTransport$AcceptLoop.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
# An unexpected error has been detected by Java Runtime Environment:
# Internal Error (4D555445583F57494E13120E4350500075), pid=1352, tid=1828
# Java VM: Java HotSpot(TM) Client VM (1.6.0-b105 mixed mode, sharing)
# Can not save log file, dump to screen..
# An unexpected error has been detected by Java Runtime Environment:
# Internal Error (4D555445583F57494E13120E4350500075), pid=1352, tid=1828
# Java VM: Java HotSpot(TM) Client VM (1.6.0-b105 mixed mode, sharing)
# If you would like to submit a bug report, please visit:
# http://java.sun.com/webapps/bugreport/crash.jsp
Does anyone has any idea?
Regards
Nidhin

Your RMI server invokes a JNI method as you mentioned. It seems your system resource is become very low as from the exception from "ZoneInfoMappi"
(Insufficient system resources exist to complete the requested service...I would suggest the following
1- remove the JNI method invocation and replace by a simple method which does nothing special ( counting etc..)
2- Run the RMI sever and stress test it again
If you see the RMI server is working well after 12 hours, then your native method is leaking i.e consuming the system resources ( RAM etc..)
You should profile the running RMI server using jconsole
Regards,
Alan Mehio

Regular RMI server object with WebLogic JNDI

Is that possible to register a regular RMI object with WebLogic JNDI
tree? I was building a simple program (using javac and rmic only) based
on the java.rmi.* (without changing the import statements to
weblogic.rmi.*) and using the weblogic.jndi to register the server
object. Below is some piece of code,
Context ctx = null;
Hashtable ht = new Hashtable();
ht.put(Context.INITIAL_CONTEXT_FACTORY,
"weblogic.jndi.WLInitialContextFactory");
ht.put(Context.PROVIDER_URL, "t3://172.20.20.20:7001");
ctx = new InitialContext(ht);
ctx.bind("HelloServer", obj);
The code failed for the following reason,
javax.naming.NamingException. Root exception is
java.rmi.MarshalException: failed to marshal public abstract void
weblogic.jndi.internal.NamingNode.bind(java.lang.String,java.lang.Object,java.util.Hashtable)
throws javax.naming.NamingException,java.rmi.RemoteException; nested
exception is:
java.rmi.server.ExportException: A description for
examples.rmi.hello.HelloImpl was found but it could not be read due to:
[Failed to find examples.rmi.hello.HelloImpl_WLStub or
examples.rmi.hello.Hello_WLStub for class examples.rmi.hello.HelloImpl]
java.rmi.StubNotFoundException: Failed to find
examples.rmi.hello.HelloImpl_WLStub or examples.rmi.hello.Hello_WLStub
for class examples.rmi.hello.HelloImpl
at
weblogic.rmi.internal.BasicDescriptor.<init>(BasicDescriptor.java:101)
at
weblogic.rmi.internal.BasicRuntimeDescriptor.<init>(BasicRuntimeDescriptor.java:50)
at
weblogic.rmi.internal.DescriptorManager.resolveClass(DescriptorManager.java:55)
at
weblogic.rmi.internal.DescriptorManager.getDescriptor(DescriptorManager.java:39)
at
weblogic.rmi.internal.DescriptorManager.getDescriptor(DescriptorManager.java:30)
at
weblogic.rmi.internal.OIDManager.getRequestDispatcher(OIDManager.java:281)
at
weblogic.rmi.internal.OIDManager.getReplacement(OIDManager.java:270)
at
weblogic.rmi.internal.OIDManager.replaceObject(OIDManager.java:98)
at
weblogic.common.internal.ChunkedObjectOutputStream.replaceObject(ChunkedObjectOutputStream.java:55)
at
weblogic.common.internal.ChunkedObjectOutputStream$NestedObjectOutputStream.replaceObject(ChunkedObjectOutputStream.java:239)
Any idea?
- SteveC

"Pyung Yoon" <[email protected]> writes:
MediatorInterface mediator = (MediatorInterface) java.rmi.Naming.lookup("rmi://localhost:7001/TestMediator);This implies JRMP which the server does not support. You need to use t3 or iiop.
andy

Rmi server communicating with client

Is there any way for an rmi server to communicate back to the client? What I mean is, the client connects to the server and calls some method x(). One of the arguments of x() is the client(x(AClient ac)). Assume that AClient is a JFrame and has a method y() which adds a button to the frame or something. If the server calls ac.y(), in my understanding/experience, the server would actually create a local copy of AClient and add the button to the local copy, not to the frame that the client user is looking at.Is this correct? {
If so, is there any way to have ac.y() add the button to the client user's frame?
If not, does anyone have any ideas for how to implement something like this relatively easily?
If not, does anyone have any ideas why it's not responding that way for me?I'm trying to avoid programming socket connections for this, and would love to be able to do it with rmi.
Thanks in advance,
m

Not sure exactly what your starting point is. But:
1. The client must be a UnicastRemoteObject.
2. If your client is behind a firewall, then the scheme probably won't work. (Explored exhaustively in this forum.)

Problem with lost of the access to the RMI server

Hi to all.
We have two applications. First one (master) provides to second (slave) through RMI service their data or other resources.
In the ordinary way all works fine. But if we need for some reason restart master application, slave can't access to the RMI service and calling of the method Naming.lookup(...) throws java.rmi.UnmarshalException: error unmarshalling return; nested exception is: java.io.EOFException
Interestingly, calling of method Namig.list(...) at this moment correctly returns an array of the names bound in the registry.
For completeness, in the time of restarting master application, classes of the RMI services are not changed and thus Stub/Skeleton classes are same on both sides.
What is reason for this behaviour? It is way to restart/restore RMI access of the slave application to the master without restarting server (Tomcat) of both applications?
Thank, Roman

Thank for your reply, but your suggestion not helped me now.
For registering and binding I used usual practices. Following snippets of code are inside method that perform initialization on application startup. I was trying three versions.
First version creates registry and binds service classes only. Without any checks.
try {
LocateRegistry.createRegistry(rmiPort);
String ip = Functions.getCurrentEnvironmentNetworkIp();
if (ip.startsWith("?"))
    throw new Exception("Can't retrieve application IP address.");
logger.info("Application IP address: " + ip);+
RMIServiceCommonImpl rmiServiceCommon = new RMIServiceCommonImpl();
String name = "rmi://" + ip + ":" + rmiPort + "/";
Naming.rebind(name + IRMIServiceCommon.RMI_SERVICE_COMMON_NAME, rmiServiceCommon);
catch (Exception e) {
logger.error("Failed to register RMI services: ", e);
}On first application start all is OK and client has no problem to access RMI service.
But if master application is restarted, calling of the method LocateRegistry.createRegistry(rmiPort); throws
java.rmi.server.ExportException: internal error: ObjID already in use
Since that, client can't access to the RMI service and following code (method Naming.lookup) throws
java.rmi.UnmarshalException: error unmarshalling return; nested exception is: java.io.EOFException
String name = "rmi://" + ConfigServlet.getProperty("rmiHostUrl") + "/";
IRMIServiceCommon service = (IRMIServiceCommon) Naming.lookup(name + IRMIServiceCommon.RMI_SERVICE_COMMON_NAME);Second version checks if registry exist and trying to get list of registered services. If services not exist Register is created.
try {
Registry reg = LocateRegistry.getRegistry(rmiPort);
String[] list = null;
try {
    list = reg.list();
catch (Exception ex) {
    // ignore
if (list == null || list.length == 0)
    LocateRegistry.createRegistry(rmiPort);
String ip = Functions.getCurrentEnvironmentNetworkIp();
if (ip.startsWith("?"))
    throw new Exception("Can't retrieve application IP address.");
logger.info("Application IP address: " + ip);
String name = "rmi://" + ip + ":" + rmiPort + "/";
RMIServiceCommonImpl rmiServiceCommon = new RMIServiceCommonImpl();
Naming.rebind(name + IRMIServiceCommon.RMI_SERVICE_COMMON_NAME, rmiServiceCommon);
catch (Exception e) {
logger.error("Failed to registering RMI services: ", e);
}Again, first start is OK.
In this case, after application restart, calling of method Naming.rebind() throws
java.lang.IllegalStateException at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1272)
INFO: Illegal access: this web application instance has been stopped already. Could not load eu.arachne.rmi.RMIServiceCommonImpl_Stub.
This exception is followed by similar exceptions, but differs in class names (stubs) - java.rmi.server.RemoteStub, java.rmi.server.RemoteObject, java.rmi.dgc.Lease, java.rmi.dgc.VMID, java.rmi.server.UID
Of course, client application can't access to the service.
The third version first unbinds all services and then performs binding again.
if (list == null || list.length == 0)
LocateRegistry.createRegistry(rmiPort);
else {
for (int ii = 0; ii < list.length; ii++)
    Naming.unbind(name + list[ii]);
}But again, rebinding fail as I mentioning above.
I don't know... :-( How I can solve this problem?
Thank, Roman

Attempting to use SSL over RMI from a web application to a RMI server

Hi,
I am attempting to use SSL over RMI to a server. The client is the web
application that is hosted on WebLogic and that attempts to connect to the
server. There is no client or server verification at either the client or
the server end. The code works outside of WebLogic 7/8 but has the following
issues when running the web application inside weblogic:
java.rmi.ConnectException: Connection refused to host: gkhanna1; nested
exception is:
java.net.ConnectException: Connection refused: connect
java.net.ConnectException: Connection refused: connect
at java.net.PlainSocketImpl.socketConnect(Native Method)
at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:350)
at java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:137)
at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:124)
at java.net.Socket.<init>(Socket.java:268)
at java.net.Socket.<init>(Socket.java:95)
at
sun.rmi.transport.proxy.RMIDirectSocketFactory.createSocket(RMIDirectSocketF
actory.java:20)
at
sun.rmi.transport.proxy.RMIMasterSocketFactory.createSocket(RMIMasterSocketF
actory.java:115)
at sun.rmi.transport.tcp.TCPEndpoint.newSocket(TCPEndpoint.java:494)
at sun.rmi.transport.tcp.TCPChannel.createConnection(TCPChannel.java:185)
at sun.rmi.transport.tcp.TCPChannel.newConnection(TCPChannel.java:169)
at sun.rmi.server.UnicastRef.newCall(UnicastRef.java:313)
at sun.rmi.registry.RegistryImpl_Stub.lookup(Unknown Source)
at java.rmi.Naming.lookup(Naming.java:79)
at
com.hyperion.css.spi.impl.ntlm.NTLMConnectionClient.initConnection(NTLMConne
ctionClient.java:59)
at
com.hyperion.css.spi.impl.ntlm.NTLMConnectionClient.getUsers(NTLMConnectionC
lient.java:197)
at com.hyperion.css.CSSAPIImpl.getUsers(Unknown Source)
at com.hyperion.css.CSSAPIImpl.initialize(Unknown Source)
at com.hyperion.css.CSSAPIImpl.initialize(Unknown Source)
at jsp_servlet._jsp._app1.__app1signin._jspService(__app1signin.java:133)
at weblogic.servlet.jsp.JspBase.service(JspBase.java:27)
at
weblogic.servlet.internal.ServletStubImpl$ServletInvocationAction.run(Servle
tStubImpl.java:1058)
at
weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java
:401)
at
weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java
:445)
at
weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java
:306)
at
weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run(W
ebAppServletContext.java:5445)
at
weblogic.security.service.SecurityServiceManager.runAs(SecurityServiceManage
r.java:780)
at
weblogic.servlet.internal.WebAppServletContext.invokeServlet(WebAppServletCo
ntext.java:3105)
at
weblogic.servlet.internal.ServletRequestImpl.execute(ServletRequestImpl.java
:2588)
at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:213)
at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:189)
The code at the client that initiates the connection:
socketFactory = (SSLSocketFactory) SSLSocketFactory.getDefault();
SSLSocket socket = (SSLSocket) socketFactory.createSocket(host, port);
socket.setEnabledCipherSuites(CIPHERS);
socket.setEnableSessionCreation(true);
Any ideas?
Thanks

I don't see anything that indicates SSL was directly a factor in the
failure.
From the exception stack it looks like a more basic connectivity issue,
maybe the URL for the
RMI server is incorrect for some reason or the server was down.
It looks like you are doing something like this:
SSL client -> WLS server with servletA, servletA RMI client
(com.hyperion.css) -> RMI server
The connection failure appears to be the connection from servletA RMI client
to the RMI server.
Is that a correct picture?
Tony
"Gaurav Khanna" <[email protected]> wrote in message
news:[email protected]...
Hi,
I am attempting to use SSL over RMI to a server. The client is the web
application that is hosted on WebLogic and that attempts to connect to the
server. There is no client or server verification at either the client or
the server end. The code works outside of WebLogic 7/8 but has thefollowing
issues when running the web application inside weblogic:
java.rmi.ConnectException: Connection refused to host: gkhanna1; nested
exception is:
java.net.ConnectException: Connection refused: connect
java.net.ConnectException: Connection refused: connect
at java.net.PlainSocketImpl.socketConnect(Native Method)
at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:350)
at java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:137)
at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:124)
at java.net.Socket.<init>(Socket.java:268)
at java.net.Socket.<init>(Socket.java:95)
at
sun.rmi.transport.proxy.RMIDirectSocketFactory.createSocket(RMIDirectSocketF
actory.java:20)
at
sun.rmi.transport.proxy.RMIMasterSocketFactory.createSocket(RMIMasterSocketF
actory.java:115)
at sun.rmi.transport.tcp.TCPEndpoint.newSocket(TCPEndpoint.java:494)
at sun.rmi.transport.tcp.TCPChannel.createConnection(TCPChannel.java:185)
at sun.rmi.transport.tcp.TCPChannel.newConnection(TCPChannel.java:169)
at sun.rmi.server.UnicastRef.newCall(UnicastRef.java:313)
at sun.rmi.registry.RegistryImpl_Stub.lookup(Unknown Source)
at java.rmi.Naming.lookup(Naming.java:79)
at
com.hyperion.css.spi.impl.ntlm.NTLMConnectionClient.initConnection(NTLMConne
ctionClient.java:59)
at
com.hyperion.css.spi.impl.ntlm.NTLMConnectionClient.getUsers(NTLMConnectionC
lient.java:197)
at com.hyperion.css.CSSAPIImpl.getUsers(Unknown Source)
at com.hyperion.css.CSSAPIImpl.initialize(Unknown Source)
at com.hyperion.css.CSSAPIImpl.initialize(Unknown Source)
at jsp_servlet._jsp._app1.__app1signin._jspService(__app1signin.java:133)
at weblogic.servlet.jsp.JspBase.service(JspBase.java:27)
at
weblogic.servlet.internal.ServletStubImpl$ServletInvocationAction.run(Servle
tStubImpl.java:1058)
at
weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java
:401)
at
weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java
:445)
at
weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java
:306)
at
weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run(W
ebAppServletContext.java:5445)
at
weblogic.security.service.SecurityServiceManager.runAs(SecurityServiceManage
r.java:780)
at
weblogic.servlet.internal.WebAppServletContext.invokeServlet(WebAppServletCo
ntext.java:3105)
at
weblogic.servlet.internal.ServletRequestImpl.execute(ServletRequestImpl.java
:2588)
at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:213)
at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:189)
The code at the client that initiates the connection:
socketFactory = (SSLSocketFactory) SSLSocketFactory.getDefault();
SSLSocket socket = (SSLSocket) socketFactory.createSocket(host, port);
socket.setEnabledCipherSuites(CIPHERS);
socket.setEnableSessionCreation(true);
Any ideas?
Thanks

How to use the same OC4j server with different port number

How to use the same OC4j server with different port numbers..?
I have to OC4J installed on my machine on different hard disk drives....
I want to be able to run both the server simultaneously..?
is it possible ..it yes then how..?
for that i have changed the port number of one server...
but when i am trying to start the other server with different port number..it says that JVM -Bind already...
Is there any clues...?
Nilesh G

In the config directory:
default-web-site.xml: Change the port the HTTP listener listens on
jms.xml: Change the port the JMS service listens on
rmi.xml: Change the port the ORMI listener listens on.
Or, you can add another web-site.xml file, and deploy your applications to 1 server, and bind the web applications to the different web sites. This way you only have to deploy your applications to 1 place.
Rob
Oracle

Error while registering RMI Server

Hi
I have a system connected to bradband with a static ip. I am planning to use this as the RMI server and any system connected to the internet as the client. Is this possible....?
I tried to bind the name to the registry and I get the following error.
C:\PROGRA~1\Java\jre1.5.0_06\bin>java -Djava.security.policy=policy HelloServer
HelloServer error: Connection refused to host: 59.144.28.215; nested exception i
s:
        java.net.ConnectException: Connection refused: connect
java.rmi.ConnectException: Connection refused to host: 59.144.58.215; nested exc
eption is:
        java.net.ConnectException: Connection refused: connect
        at sun.rmi.transport.tcp.TCPEndpoint.newSocket(Unknown Source)
        at sun.rmi.transport.tcp.TCPChannel.createConnection(Unknown Source)
        at sun.rmi.transport.tcp.TCPChannel.newConnection(Unknown Source)
        at sun.rmi.server.UnicastRef.newCall(Unknown Source)
        at sun.rmi.registry.RegistryImpl_Stub.rebind(Unknown Source)
        at java.rmi.Naming.rebind(Unknown Source)
        at HelloServer.main(HelloServer.java:18)
Caused by: java.net.ConnectException: Connection refused: connect
        at java.net.PlainSocketImpl.socketConnect(Native Method)
        at java.net.PlainSocketImpl.doConnect(Unknown Source)
        at java.net.PlainSocketImpl.connectToAddress(Unknown Source)
        at java.net.PlainSocketImpl.connect(Unknown Source)
        at java.net.SocksSocketImpl.connect(Unknown Source)
        at java.net.Socket.connect(Unknown Source)
        at java.net.Socket.connect(Unknown Source)
        at java.net.Socket.<init>(Unknown Source)
        at java.net.Socket.<init>(Unknown Source)
        at sun.rmi.transport.proxy.RMIDirectSocketFactory.createSocket(Unknown S
ource)
        at sun.rmi.transport.proxy.RMIMasterSocketFactory.createSocket(Unknown S
ource)
        ... 7 moreCan anyone help me by resolving this error.....

what do you mean by intranet address?
If you use some NAT device (e.g, DSL, cable) that it is likely you won't be able to access the registry using the external IP address. In such case you need to open the registry port in the firewall.

Help needed in running the RMI application with multiple clients

Hi
I have my RMI application with one server and 6 clients. I keep all the server and client programs in the same directory. When i run the clients, the first 2 clients work properly but when the third or the fourth client starts, it works normally in getting the data and after a while it crashes. If teh third crashes the 4th works and if the 4th crashes the 3rd, 4th and 5th works ...randomly atleast one or 2 clients crash always.
following is the error message generated for a client named controller:
[ code ]
Exception in thread "main" java.lang.NullPointerException
at PostOfficeImpl.isinputAvail(PostOfficeImpl.Java:315)
at PostOfficeImpl_Skel.dispatch(Unknown Source)
at sun.rmi.server.UnicastServerRef.oldDispatch(UnicastServerRef.java:375)
at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:240)
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)
at PostOfficeImpl_Stub.isinputAvail(Unknown Source)
at CONTROLLER.main(CONTROLLER.java:167)
my ser ver program is as follows:
class PostOfficeServer extends java.rmi.server.UnicastRemoteObject implements java.rmi.Remote {
// Instance of ourselves
public static String name;
private static PostOfficeServer rmi;
// public No-argument constructor
public PostOfficeServer() throws RemoteException {
     super();
public static void main(String[] args){
if(System.getSecurityManager() == null) {
     System.setSecurityManager(new RMISecurityManager());
try {
     new PostOfficeServer();
     PostOffice postOfficeserver = new PostOfficeImpl();
try {
     getIP ipAdd1 = new getIP();
     String ip1 = ipAdd1.getIP();
     name = "//" + ip1 + "/PostOffice";
catch (Exception e){
     System.out.println();
Naming.rebind(name, postOfficeserver);
System.out.println("RemoteServer bound");
System.out.println("initialise Data Structure");
postOfficeserver.initDatastructure();
System.out.println("initilised");
catch (java.rmi.RemoteException e) {
     System.out.println("Cannot create remote server object");
catch (java.net.MalformedURLException e) {
     System.out.println("Cannot look up server object");
System.out.println("Server started.");
System.out.println("Enter <CR> to end.");
try {
     int serve2end = System.in.read();
}catch (IOException ioException) {
System.exit(0);
//endoffilePlease advise as this is very urgent

Hi
the following is the code for PostOfficeImpl...its a long code but i include it so that I get your help please...
import java.io.*;
import java.net.*;
import java.lang.*;
import java.rmi.*;
import java.rmi.server.*;
import java.rmi.RemoteException;
import java.util.HashMap;
import java.util.*;
public class PostOfficeImpl extends java.rmi.server.UnicastRemoteObject implements PostOffice {
//Implementations must have an explicit constructor in order to declare the
//RemoteException exception
public PostOfficeImpl() throws java.rmi.RemoteException {
     super();
public static LinkedListImpl list = new LinkedListImpl();
public static oListImpl ovarList = new oListImpl();
public static iListImpl ivarList =new iListImpl();
public static lipsList llfirst;
public static oList opchannel, ofirst, onext;
public static iList ipchannel, ichan, ifirst;
public static String[] variNumber= new String[100];
public static String[] inoutChan, inChan, outChan,inVAR, invarLIST,outVAR, outvarLIST ;
public static String[][] driveMat;
DriverMatrix_mthds drive = new DriverMatrix_mthds();
private static Boolean All_Vacant;
private static Boolean tAll_Vacant;
public void sendAll_Vacant(Boolean All_Vacant) throws RemoteException {
     tAll_Vacant = All_Vacant;
public Boolean getAll_Vacant() throws RemoteException{
      return tAll_Vacant;
public void initDatastructure() throws RemoteException{
ifirst = null;
ofirst=null;
int i=0, j=0, k=0, ind1=0, ind2=0;
try{/// initialise list
     drive = new DriverMatrix_mthds();
     drive.VarTypeArray();
     drive.nodeHeadVarType();
     String[] variablel = drive.Variablelist();
     drive.lipsvariablist();
     drive.NodeOrigin();
drive.nodeInput();
     drive.numOfnodes();
     drive.noOfVariables();
     drive.Assignlist();
     drive.novarType();
     drive.varNameType();
     drive.nodeNumName();
     drive.driverMat();
     String[][] lookupvar = drive.varNameType();
     //tempdrive = drive.driverMat();
     long leng1 = variablel.length;
     int varlistlength = (int) leng1;
     int counter;
     String s1="";
     String s2="";
     String s3 = "";
     String s4 = "";
     String s6 = "";
     int s5=0, c=0;
     while(variablel[k] !=null){
          k=k+1;
     int i1, j1;
     String varname, varnumber;
     varnumber = "";
while(i<=variablel.length-1){
     if(variablel!=null){
     c=c+1;
     i=i+1;
try{
     ind1=0; ind2 = 0;i=0;
while(!(variablel[i].equals("end of file"))){
     s1 = variablel[i];
     i=i+1;
     s2 = variablel[i];
     i=i+1;
     System.out.println("     " + s1+"     "+s2);
while(!(variablel[i].equals("end of input variable"))){
     s4 = variablel[i];
     i1=0;
     Brkwhile:while(i1<=lookupvar.length-1){
     j1=1;
     if(lookupvar[i1][j1] != null){
     if(lookupvar[i1][j1].equals(s4)){
          s3 = lookupvar[i1][0];
          break Brkwhile;
     i1=i1+1;
//ifirst.varNum = varnumber;
s5 = 0;
s6 = null;
ifirst= new iList(s3,s4, s5, s6);
ivarList.add(ifirst);
System.out.println(s3+"     "+s4+"     "+s5+"     "+s6);
i=i+1;
i = i + 1;
System.out.println("input list finished ");
while(!(variablel[i].equals("end of output variable"))){
     s4 = variablel[i];
     i1=0;
     j1=1;
     Brkwhile:while(lookupvar[i1][j1] != null){
          if(lookupvar[i1][j1].equals(s4)){
          s3 = lookupvar[i1][0];
          break Brkwhile;
     i1=i1+1;
     s5 = 0;
     s6 = null;
     ofirst= new oList(s3,s4, s5, s6);
     ovarList.add(ofirst);
     System.out.println(s3+"     "+s4+"     "+s5+"     "+s6);
     i=i+1;
     llfirst = new lipsList(s1, s2, ivarList, ovarList);
     list.add(llfirst);
     System.out.println("output list finished ");
     i=i+1;
     catch (NullPointerException ne){
     catch (Exception d){}
public int isitOK(reqPacket sndNodetail)
     throws RemoteException{
     String nodnum = sndNodetail.srcNum;
     String varnum = sndNodetail.varNum;
     int status = 0;
     llfirst = list.getFirst();
     try{mainbegin:while (llfirst != null){
          if((llfirst.nodeNum).equals(nodnum)){
          ofirst = ovarList.getFirst();
          while(ofirst != null){
               if((ofirst.varNum).equals(varnum)){
               if(ofirst.varVal==null){
               status = 1;
               break mainbegin;
     ofirst = ofirst.next;
     llfirst = llfirst.next;
     catch (NullPointerException nl){}
     return status;
public int senData(dataPacket sendToRTS)
     throws RemoteException{
dataPacket datDetail = sendToRTS;
String nnum, vnum,typename, dval;
String dtype = "";
nnum = datDetail.nodeNum;
vnum = datDetail.varNum;
typename = datDetail.dataType;
dval = String.valueOf(datDetail.dataVal);
String [][] tempdrive, varnametype;
int status =0;
System.out.println("data received is from node " nnum " is "+ dval+"var num " +vnum);
status =0;
try{
//DriverMatrix_mthds drive = new DriverMatrix_mthds();
drive.VarTypeArray();
drive.Variablelist();
drive.NodeOrigin();
drive.nodeInput();
drive.numOfnodes();
drive.noOfVariables();
String[][] lookupvar = drive.novarType();
drive.varNameType();
drive.nodeNumName();
drive.driverMat();
tempdrive = drive.driverMat();
String varname="";
int i,j;
//with the recived var name get the var num
for(i=0; i<=lookupvar.length-1; i++){
     j=0;
     if(lookupvar[i][j] != null){
          if(lookupvar[i][j].equals(typename)){
               dtype = lookupvar[i][1];
     }//varname is moved to dtype n used for checking
     for(i=0; i<=tempdrive.length-1; i++){j=0;
     if (tempdrive[i][j] != null){
     if (tempdrive[i][0].equals(vnum)){
          if (tempdrive[i][1].equals(nnum)){
          if(tempdrive[i][2].equals(dtype)){
          status = 1;
     }//System.out.println("received data " vnum " "+ nnum +" " + dtype +" "+dval);// after checking status if the status is 1 then set the counter n olist// to no of times the value has to be ditributed
int Ccount =0;
//opchannel = llfirst.olist;
try{
     System.out.println("status"+status);
     if (status == 1){
          llfirst = list.getFirst();
     mainWhile: while (llfirst != null){
          if((llfirst.nodeNum).equals(nnum)){
               ofirst = ovarList.getFirst();
               while(ofirst != null){
               if((ofirst.varNum).equals(vnum)){
                    ofirst.varVal =dval;
                    //setting the counter for the varname
                    //check driver matrix fr the no of occurances
               for(i=0; i<=tempdrive.length-1; i++){
               j=0;
               if (tempdrive[i][j] != null){
                    if (tempdrive[i][0].equals(vnum)){
                    for(j= j+3;j<=tempdrive.length-1;j++){
                    if(tempdrive[i][j] != null){
                    if(tempdrive[i][j].equals("1")){
                    Ccount = Ccount + 1;
System.out.println("count"+Ccount);
ofirst.counter = Ccount;
ofirst.varNum = vnum;for(i=0; i<=lookupvar.length-1; i++){
for(j=0; j<=2; j++){
     if(lookupvar[i][j] != null){
     if(lookupvar[i][j].equals(vnum)){
          varname = lookupvar[i][1];
     ofirst.varName = varname;
     Ccount=0;
     break mainWhile;
     ofirst = ofirst.next;
     llfirst = llfirst.next;
     catch(NullPointerException s){}
/*use the vnum in the driver matrix and find out the nodes to which this variable
*has been sent as input , i mean destination nodes..
*find the node numbers ..knowing the node numbers parse through data structure
and set the input values to value and status 1./
llfirst = list.getFirst();
while(llfirst != null){
     ifirst = llfirst.ilist.getFirst();
     while(ifirst != null){
          if (ifirst.varNum.equals(vnum)){
          ifirst.varStat = 1;
          ifirst.varVal = dval;
          //     System.out.println("nodenum "+llfirst.nodeNum+" varval     " + ifirst.varVal +"     stat "+ifirst.varStat+" vnum " + ifirst.varNum);
     ifirst=ifirst.next;
     llfirst=llfirst.next;
     catch (Exception e){};
     return status;
public int isinputAvail(reqPacket inputReq)
     throws RemoteException{
     String srcnum = inputReq.srcNum;
     String varnum = inputReq.varNum;
     int availstatus =0;
     llfirst = list.getFirst();
     //System.out.println("llfirst.nodeNum     "+ llfirst.nodeNum);
     whileloop:while (llfirst != null){
          if((llfirst.nodeNum).equals(srcnum)){
          ifirst = llfirst.ilist.getFirst();
          breakloop: while(ifirst != null){
          //System.out.println("var num " + varnum + "     " + "status outside" + ifirst.varStat);
          if((ifirst.varNum).equals(varnum)){
          if (ifirst.varStat == 1){
               availstatus = 1;
               ifirst.varStat = 0;
               // System.out.println("var num " + varnum + "     " + "status" + availstatus);
               break whileloop;
     ifirst = ifirst.next;
     llfirst = llfirst.next;
     //System.out.println("var num " + varnum + "     " + "status" + availstatus);
     return availstatus;
public dataPacket senDatatoNode(reqPacket sendFromRTS)
     throws RemoteException {
     String nnum, vnum, dtype, dval;
     //nnum = "";
     dtype="";
     //opchannel = llfirst.olist;
     //     ipchannel = llfirst.ilist;
     reqPacket sendfromrts = sendFromRTS;
     nnum = sendfromrts.srcNum;
     vnum = sendfromrts.varNum;
     //     dtype = sendFromRTS.dataType;
     dval = "";
     int ctrchk=0;
     try{
     //send data to process node n reduce the counter by 1
     llfirst = list.getFirst();
          mainWhile: while (llfirst != null){
          if((llfirst.nodeNum).equals(nnum)){
          ofirst = llfirst.olist.getFirst();
     whileofirst: while(ofirst != null){
          if((ofirst.varNum).equals(vnum)){
          dval = ofirst.varVal;
          ofirst.counter = ofirst.counter - 1;
          //     System.out.println(ofirst.counter);
          ctrchk=ofirst.counter;
          break whileofirst;
     ofirst = ofirst.next;
//set the status of respective input channel to 0 as data has been sent
     ifirst = llfirst.ilist.getFirst();
     if(ctrchk == 0){
     whileifirst: while(ifirst != null){
          if((ifirst.varNum).equals(vnum)){
          //ifirst.varVal = dval;
          ifirst.varStat =0;
          break whileifirst;
     llfirst = llfirst.next;
     //System.out.println(llfirst);
     catch(NullPointerException s){}
//find type
try{
     DriverMatrix_mthds driver = new DriverMatrix_mthds();
     driver.VarTypeArray();
     driver.Variablelist();
     driver.NodeOrigin();
     driver.nodeInput();
     driver.numOfnodes();
     driver.noOfVariables();
     driver.novarType()     ;
     String[][] lookupvar = driver.varNameType();
     int i, j;
     String varNum = vnum;
     for(i=0; i<=lookupvar.length-1; i++){
          j=0;
          if(lookupvar[i][j] != null){
          if(lookupvar[i][j].equals(vnum)){
          dtype = lookupvar[i][2];
     catch (Exception d){}
     dataPacket retpac = new dataPacket(nnum, vnum, dtype, dval);
     System.out.println("msg sent "+ nnum +"     " + vnum+" "+ dtype+"     "+ dval);
     return retpac;
public String findnodeName(String nodeNum)
     throws RemoteException{
String nnum = nodeNum;
llfirst = list.getFirst();
while (llfirst != null){
     if((llfirst.nodeNum).equals(nnum)){
     return llfirst.nodeName;
     llfirst = llfirst.next;
     System.out.println("node Number does not match with the list of node numbers generated..try again");
     return null;
//find the nodenum given the node name
public String findnodenum(String nodename)
     throws RemoteException{
     String nodenumber ="";
     String nodname = nodename;
     try{DriverMatrix_mthds driver = new DriverMatrix_mthds();
     driver.VarTypeArray();
     driver.Variablelist();
     driver.NodeOrigin();
     driver.nodeInput();
     driver.numOfnodes();
     driver.noOfVariables();
     driver.novarType()     ;
     driver.varNameType();
     String[][] lookupnode = driver.nodeNumName();
     int i, j;
     for(i=0; i<=lookupnode.length-1; i++){
     for(j=0; j<=2; j++){
          if(lookupnode[i][j] != null){
          if(lookupnode[i][j].equals(nodname)){
               nodenumber = lookupnode[i][2];
     catch (Exception d){}
     return nodenumber;
public String findvarnum(String variablename)
     throws RemoteException{
     String varnumber = "";
     try{
     DriverMatrix_mthds driver = new DriverMatrix_mthds();
     driver.VarTypeArray();
     driver.Variablelist();
     driver.NodeOrigin();
     driver.nodeInput();
     driver.numOfnodes();
     driver.noOfVariables();
     driver.novarType()     ;
     String[][] lookupvar = driver.varNameType();
     int i, j;
     String varname = variablename;
     for(i=0; i<=lookupvar.length-1; i++){
     for(j=0; j<=2; j++){
          if(lookupvar[i][j] != null){
          if(lookupvar[i][j].equals(varname)){
               varnumber = lookupvar[i][0];
catch (Exception d){}
return varnumber;
public String findvartype(String varname)
     throws RemoteException{
     String vartype = "";
     try{
     DriverMatrix_mthds driver = new DriverMatrix_mthds();
     driver.VarTypeArray();
     driver.Variablelist();
     driver.NodeOrigin();
     driver.nodeInput();
     driver.numOfnodes();
     driver.noOfVariables();
     driver.novarType();
     String[][] lookupvar = driver.varNameType();
     int i, j;
     String varName = varname;
     for(i=0; i<=lookupvar.length-1; i++){
     for(j=0; j<=2; j++){
          if(lookupvar[i][j] != null){
          if(lookupvar[i][j].equals(varName)){
               vartype = lookupvar[i][2];
catch (Exception d){}
return vartype;
public String findtypenum(String vartype){
String varnum = "";int i;
try{
     DriverMatrix_mthds driver = new DriverMatrix_mthds();
     driver.VarTypeArray();
     driver.Variablelist();
     driver.NodeOrigin();
     driver.nodeInput();
     driver.numOfnodes();
     driver.noOfVariables();
     String varNum[][] =      driver.novarType()     ;
     String varType = vartype;
     for(i=0; i<=9-1; i++){
          if(varNum[i][0] != null){
          if(varNum[i][0].equals(varType)){
               varnum = varNum[i][1];
catch (Exception d){}
return vartype;
//return input variable list
public String[] inoutchanlist(String nodenum, String nodenam)
     throws RemoteException{
try{
     DriverMatrix_mthds drive = new DriverMatrix_mthds();
     String[] varLIST = drive.Variablelist();
     int i=0;int j;
     while(varLIST[i]!=null){
          i=i+1;
     int arrlength = i;
     inoutChan = new String[arrlength];
     i=0; j=0;
     WHILELOOP:
     while(!(varLIST[i].equals("end of file"))){
     while(varLIST[i].equals(nodenum)){
          i=i+1;
          while(varLIST[i].equals(nodenam)){
               i=i+1;
               while(!(varLIST[i].equals("end of input variable"))){
                    inoutChan[j] = varLIST[i];
                    i=i+1;
                    j=j+1;
          System.out.println("endofinput");
          inoutChan[j]="endofinchan";
          j=j+1;
          i=i+1;
          while(!(varLIST[i].equals("end of output variable"))){
     inoutChan[j] = varLIST[i];
     i=i+1;
     j=j+1;
     System.out.println("endofoutput");
     inoutChan[j]="endofoutchan";
     break WHILELOOP;
     i=i+1;
     arrlength =j;
     for(j=0; j<=arrlength-1; j++){
     System.out.println(inoutChan[j]);
     catch (Exception e){}
     return inoutChan;
public String[] inchannel(String[] inoutChan) throws RemoteException{
int count=0;int i=0, j=0;
System.out.println("entered");
while(inoutChan[count]!=null){
     System.out.println(count + " " +inoutChan[count]);
     count=count+1;
     inChan = new String[count];
     while(!(inoutChan[i].equals("endofinchan"))){
     inChan[j] =inoutChan[i];
     j=j+1; i=i+1;
return inChan;
public String[] outchannel(String[] inoutChan) throws RemoteException{
int count=0;int i=0, j=0;
System.out.println("entered");
while(inoutChan[count]!=null){
     System.out.println(count + " " +inoutChan[count]);
     count=count+1;
     outChan = new String[count+1];
     while(!(inoutChan[i].equals("endofinchan"))){
          i=i+1;
     i=i+1;
     while(!(inoutChan[i].equals("endofoutchan"))){
          outChan[j] =inoutChan[i];
          j=j+1; i=i+1;
     return outChan;
public String[] invarChan(String nodename, int guardno)throws RemoteException{
try{
DriverMatrix_mthds drive = new DriverMatrix_mthds();
invarLIST = drive.invarlist();
int i=0;int j;
while(invarLIST[i]!=null){
     i=i+1;
     int arrlength = i;
     inVAR = new String[arrlength];
     i=0; j=0;
          WHILELOOP: while(!(invarLIST[i].equals("end of file"))){
               if (invarLIST[i].equals(nodename)){
     i=i+1;
     while(!(invarLIST[i].equals(nodename+String.valueOf(guardno)))){
     i=i+1;}
     i=i+1;
     while(!(invarLIST[i].equals("endofguard"))){
     System.out.println(invarLIST[i]);inVAR[j]=invarLIST[i]; i=i+1; j=j+1;}
     break WHILELOOP;}
     i=i+1;}
}catch (Exception d){}
return inVAR;
public String[] outvarChan(String nodename, int guardcount)throws RemoteException{
     try{
     DriverMatrix_mthds drive = new DriverMatrix_mthds();
     outvarLIST = drive.outvarlist();
     int i=0;int j;
     while(outvarLIST[i]!=null){
          i=i+1;
     int arrlength = i;
     outVAR = new String[arrlength];
     i=0; j=0;
     WHILELOOP: while(!(outvarLIST[i].equals("end of file"))){
          if (outvarLIST[i].equals(nodename)){
               i=i+1;
               while(!(outvarLIST[i].equals(nodename+String.valueOf(guardcount)+"guard"))){
                    i=i+1;}
          i=i+1;
          while(!(outvarLIST[i].equals("end guard"))){
          System.out.println(outvarLIST[i]);outVAR[j]=outvarLIST[i]; i=i+1; j=j+1;}
          break WHILELOOP;}
     i=i+1;}
}catch (Exception d){}
return outVAR;
private static Boolean start;
private static Boolean tstart;
public void sendstart(Boolean start) throws RemoteException {
     tstart = start;
public Boolean getstart() throws RemoteException{
     return tstart;
private static Boolean done;
private static Boolean tdone;
public void senddone(Boolean done) throws RemoteException {
     tdone = done;
public Boolean getdone() throws RemoteException{
     return tdone;
private static Boolean vac_busy1;
private static Boolean tvac_busy1;
public void sendvac_busy1(Boolean vac_busy1) throws RemoteException {
     tvac_busy1 = vac_busy1;
public Boolean getvac_busy1() throws RemoteException{
     return tvac_busy1;
private static int cus1_rit1;
private static int tcus1_rit1;
public void sendcus1_rit1(int cus1_rit1) throws RemoteException {
     tcus1_rit1 = cus1_rit1;
public int getcus1_rit1() throws RemoteException{
     return tcus1_rit1;
private static int cus1_rit2;
private static int tcus1_rit2;
public void sendcus1_rit2(int cus1_rit2) throws RemoteException {
     tcus1_rit2 = cus1_rit2;
public int getcus1_rit2() throws RemoteException{
     return tcus1_rit2;
private static int cus1_rit3;
private static int tcus1_rit3;
public void sendcus1_rit3(int cus1_rit3) throws RemoteException {
     tcus1_rit3 = cus1_rit3;
public int getcus1_rit3() throws RemoteException{
     return tcus1_rit3;
private static int cus1_it1;
private static int tcus1_it1;
public void sendcus1_it1(int cus1_it1) throws RemoteException {
     tcus1_it1 = cus1_it1;
public int getcus1_it1() throws RemoteException{
     return tcus1_it1;
private static int cus1_it2;
private static int tcus1_it2;
public void sendcus1_it2(int cus1_it2) throws RemoteException {
     tcus1_it2 = cus1_it2;
public int getcus1_it2() throws RemoteException{
     return tcus1_it2;
private static int cus1_it3;
private static int tcus1_it3;
public void sendcus1_it3(int cus1_it3) throws RemoteException {
     tcus1_it3 = cus1_it3;
public int getcus1_it3() throws RemoteException{
     return tcus1_it3;
private static int stkit_11;
private static int tstkit_11;
public void sendstkit_11(int stkit_11) throws RemoteException {
     tstkit_11 = stkit_11;
public int getstkit_11() throws RemoteException{
     return tstkit_11;
private static int stkit_12;
private static int tstkit_12;
public void sendstkit_12(int stkit_12) throws RemoteException {
     tstkit_12 = stkit_12;
public int getstkit_12() throws RemoteException{
     return tstkit_12;
private static int stkit_13;
private static int tstkit_13;
public void sendstkit_13(int stkit_13) throws RemoteException {
     tstkit_13 = stkit_13;
public int getstkit_13() throws RemoteException{
     return tstkit_13;
private static int c1_it1;
private static int tc1_it1;
public void sendc1_it1(int c1_it1) throws RemoteException {
     tc1_it1 = c1_it1;
public int getc1_it1() throws RemoteException{
     return tc1_it1;
private static int c1_it2;
private static int tc1_it2;
public void sendc1_it2(int c1_it2) throws RemoteException {
     tc1_it2 = c1_it2;
public int getc1_it2() throws RemoteException{
     return tc1_it2;
private static int c1_it3;
private static int tc1_it3;
public void sendc1_it3(int c1_it3) throws RemoteException {
     tc1_it3 = c1_it3;
public int getc1_it3() throws RemoteException{
     return tc1_it3;
//endoffile

How to get the IP address of RMI server???

Hi:
Is there a way to know the IP address of RMI server before client and server connect?
I am assuming that client didn't know the IP address of the server.
Because I know that client must hold a server reference so that client can connect to server.
But I want my client program to find out server IP address before they connect and use this finding to connect to server.
Is it possible?
Thanks!

So you KNOW that the client MUST know where the server is yet you want the client to find out where the server is?
Simple answer: forget it.
If you don't know where to connect to how are you ever going to connect to it?
And if you do know you don't have to go looking it up...
You can probably do something with JNDI, but then you're only putting off the inevitable as now you need to both know how to contact the JNDI server AND the JNDI server needs to know where the the RMI registry for the service you want to connect to is.

RMI server with IP Addres

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