java.rmi.ConnectionExceptionException:Connect refused to host

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java.rmi.ConnectionExceptionException:Connect refused to host

java.rmi.ConnectionExceptionException:Connect refused to host

2004-11-17 - By Kurien Joseph

Back

Reply: 1 2 3 4 5 6

* First check if you can ping both machines from each other.
* If you still can ping make sure the localhost setting in your
host file to map to the IP address instead of the 127.0.0.1 loopback.

-Kurien

__ __

From: A mailing list for Java(tm) 2 Platform, Enterprise Edition
[mailto:J2EE-INTEREST@(protected)] On Behalf Of Edward King
Sent: Wednesday, November 17, 2004 12:41 AM
To: J2EE-INTEREST@(protected)
Subject: java.rmi.ConnectionExceptionException:Connect refused to host

I write a rmi,when server and client runs in the same machine,it runs
ok,then I run them in two machines,server runs in 192.168.0.1,like
follows:
C:\>rmiregistry -J-Djava.security.policy=registerit.policy
C:\>java -Djava.rmi.dgc.leaseValue=1000
-Djava.security.policy=registery.policy RegisterIt
Object instantiated: HelloServer[RemoteStub [ref:
[endpoint:[192.168.0.1:3120](l
ocal),objID:[0]]]]

and it ok ,client runs in 192.168.0.2, but it raise errors:
java -Djava.security.policy=registerit.policy HelloClient
HelloClient exception :java.rmi.ConnectionException:Connection refused
to host:192.168.0.2;nested exception
is:java.net.ConnectException

Source code of java.net.ConnectException

:Connection refused:connect

Why? how to solve it? I have puzzled with it for many days! Please help.
Any idea will be appreciated!

My code is follows:
--HelloInterface.java--
public interface HelloInterface extends java.rmi.Remote{
public String sayHello() throws java.rmi.RemoteException

;
}

--HelloServer.java--
import java.io.*;
import java.rmi.*;
import java.rmi.server.*;
import java.util.*;
public class HelloServer extends UnicastRemoteObject implements
HelloInterface{
public HelloServer() throws RemoteException{
super();
}

public String sayHello() throws RemoteException{
return "Hello world, the current system time is "+new Date();
}
}

--RegisterIt.java--
import java.rmi.*;
public class RegisterIt{
public static void main(String args[]){
try{
HelloServer obj=new HelloServer();
System.out.println("Object instantiated: "+obj);
Naming.rebind("/HelloServer",obj);
System.out.println("HelloServer bound in registery");
}
catch(Exception e){
System.out.println(e);
}
}
}

--registerit.policy--
grant{
permission java.security.AllPermission

Source code of java.security.AllPermission

;
};

--HelloClient.java--
import java.rmi.*;
public class HelloClient{
public static void main(String args[]){
if(System.getSecurityManager()==null){
System.out.println("null");
System.setSecurityManager(new RMISecurityManager());
}
try{
HelloInterface obj=(HelloInterface)Naming.lookup("/HelloServer");
String message=obj.sayHello();
System.out.println(message);
}
catch(Exception e){
System.out.println("HelloClient exception: "+e);
}
}
}

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<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft
-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns="http:
//www.w3.org/TR/REC-html40">

<head>
<META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=us-ascii">
<meta name=Generator content="Microsoft Word 11 (filtered medium)">

<style>

</style>

</head>

<body bgcolor=white lang=EN-US link=blue vlink=purple>

<div class=Section1>

<ul style='margin-top:0in' type=disc>
<li class=MsoNormal style='color:navy;mso-list:l0 level1 lfo1'>First
check if you can ping both machines from each other.<o:p></o:p></li>
<li class=MsoNormal style='color:navy;mso-list:l0 level1 lfo1'>If
you still can ping make sure the localhost setting in your host file to
map to the IP address instead of the 127.0.0.1 loopback.<o:p></o:p>
</li>
</ul>

<o:p> </o:p>

-Kurien<o:p></o:p>

<o:p> </o:p>

<o:p> </o:p>

<div>

<div class=MsoNormal align=center style='text-align:center'>

<hr size=2 width="100%" align=center tabindex=-1>

</div>

From: A mailing list
for Java(tm) 2 Platform, Enterprise Edition [mailto:J2EE-INTEREST@(protected)]
On Behalf Of Edward King 
Sent: Wednesday, November 17, 2004
12:41 AM 
To: J2EE-INTEREST@(protected) 
Subject:
java.rmi.ConnectionExceptionException:Connect refused to host<o:p
></o:p>

</div>

<o:p
> </o:p>

<div>

I
write a rmi,when server and client runs in the same machine,it runs ok,then I
run them in two machines,server runs in 192.168.0.1,like follows: 
C:\>rmiregistry -J-Djava.security.policy=registerit.policy 
C:\>java -Djava.rmi.dgc.leaseValue=1000
-Djava.security.policy=registery.policy RegisterIt 
Object instantiated: HelloServer[RemoteStub [ref:
[endpoint:[192.168.0.1:3120](l 
ocal),objID:[0]]]]<o:p></o:p>

</div>

<div>

 <o:p></o:p>

</div>

<div>

and
it ok ,client runs in 192.168.0.2, but it raise errors: 
java -Djava.security.policy=registerit.policy HelloClient 
HelloClient exception :java.rmi.ConnectionException:Connection refused to
host:192.168.0.2;nested exception is:java.net.ConnectException

:Connection
refused:connect<o:p></o:p>

</div>

<div>

 <o:p></o:p>

</div>

<div>

Why?
how to solve it? I have puzzled with it for many days! Please help. 
Any idea will be appreciated!<o:p></o:p>

</div>

<div>

 <o:p></o:p>

</div>

<div>

My
code is follows: 
--HelloInterface.java-- 
public interface HelloInterface extends java.rmi.Remote{ 
public String sayHello() throws java.rmi.RemoteException

; 
}<o:p></o:p>

</div>

<div>

 <o:p></o:p>

</div>

<div>

-
-HelloServer.java-- 
import java.io.*; 
import java.rmi.*; 
import java.rmi.server.*; 
import java.util.*; 
public class HelloServer extends UnicastRemoteObject implements HelloInterface{
 
public HelloServer() throws RemoteException{ 
super(); 
}<o:p></o:p>

</div>

<div>

 <o:p></o:p>

</div>

<div>

public
String sayHello() throws RemoteException{ 
return "Hello world, the current system time is "+new Date(); 
} 
}<o:p></o:p>

</div>

<div>

 <o:p></o:p>

</div>

<div>

-
-RegisterIt.java-- 
import java.rmi.*; 
public class RegisterIt{ 
public static void main(String args[]){ 
try{ 
HelloServer obj=new HelloServer(); 
System.out.println("Object instantiated: "+obj); 
Naming.rebind("/HelloServer",obj); 
System.out.println("HelloServer bound in registery"); 
} 
catch(Exception e){ 
System.out.println(e); 
} 
} 
}<o:p></o:p>

</div>

<div>

 <o:p></o:p>

</div>

<div>

-
-registerit.policy-- 
grant{ 
permission java.security.AllPermission

; 
}; <o:p></o:p>

</div>

<div>

 <o:p></o:p>

</div>

<div>

-
-HelloClient.java-- 
import java.rmi.*; 
public class HelloClient{ 
public static void main(String args[]){ 
if(System.getSecurityManager()==null){ 
System.out.println("null"); 
System.setSecurityManager(new RMISecurityManager()); 
} 
try{ 
HelloInterface obj=(HelloInterface)Naming.lookup("/HelloServer"); 
String message=obj.sayHello(); 
System.out.println(message); 
} 
catch(Exception e){ 
System.out.println("HelloClient exception: "+e); 
} 
} 
}<o:p></o:p>

</div>

</div>

</body>

</html>
===========================================================================
To unsubscribe, send email to listserv@(protected) and include in the body
of the message "signoff J2EE-INTEREST". For general help, send email to
listserv@(protected) and include in the body of the message "help".

===========================================================================
To unsubscribe, send email to listserv@(protected) and include in the body
of the message "signoff J2EE-INTEREST". For general help, send email to
listserv@(protected) and include in the body of the message "help".