File APIs for Java Developers
Manipulate DOC, XLS, PPT, PDF and many others from your application.
http://aspose.com/file-tools
The moose likes Distributed Java and the fly likes RMI UnknownHostException Problem Big Moose Saloon
  Search | Java FAQ | Recent Topics | Flagged Topics | Hot Topics | Zero Replies
Register / Login


Win a copy of EJB 3 in Action this week in the EJB and other Java EE Technologies forum!
JavaRanch » Java Forums » Java » Distributed Java
Bookmark "RMI UnknownHostException Problem" Watch "RMI UnknownHostException Problem" New topic
Author

RMI UnknownHostException Problem

Joshua Evans
Greenhorn

Joined: Dec 21, 2013
Posts: 3

I am having trouble with a Java RMI system that I am building. I keep getting an UnknownHostException when I try to connect. For host names, I've tried my IPv4 address, IPv6 address, "localhost", some other things, and more. I also tried typing in random words to see if there was a difference. There wasn't; I got exactly the same error. Here's some code:

The main client-side class:


The Client Network IO Class:


The Server-Side Network IO Class:


The Remote Interface:


The Remote Implementation:

The error message (EvansGame is the name of my computer, but the error is the same no matter what I type. I could type "foo bar" and nothing would change):


The WebConstants Class (Accessed by both Client and Server):


I don't have much knowledge of networking or RMI, so I really don't understand why this is happening.
K. Tsang
Bartender

Joined: Sep 13, 2007
Posts: 1958
    
    7

Try having your SERVICE_NAME one word instead of 2.


K. Tsang JavaRanch SCJP5 SCJD/OCM-JD
Joshua Evans
Greenhorn

Joined: Dec 21, 2013
Posts: 3

Didn't work.
K. Tsang
Bartender

Joined: Sep 13, 2007
Posts: 1958
    
    7

What IP address did you use to start the RMI server? localhost or 127.0.0.1 or something else. It should work for 127.0.0.1 if client and server are on same computer. The other 2 may need to put entry in HOSTS file.
Joshua Evans
Greenhorn

Joined: Dec 21, 2013
Posts: 3

I had already tried those, but I tried them again for sure, and... still didn't work. As I said, the error is the same no matter what I type in.
 
I agree. Here's the link: http://aspose.com/file-tools
 
subject: RMI UnknownHostException Problem
 
Similar Threads
RMI Concepts
RMI in JDK6 problem
JFileChooser Applet do not close on button click
Exception in RMI program
java.rmi.server.ExportException: Port already in use: 10344;