Re: RMI & connection refused

From:

Tom Anderson <twic@urchin.earth.li>

Newsgroups:

comp.lang.java.programmer

Date:

Sun, 2 Aug 2009 13:39:01 +0100

Message-ID:

<alpine.DEB.1.10.0908021324070.17718@urchin.earth.li>

On Sat, 1 Aug 2009, Duane Evenson wrote:

Here's my commands:

rmiregistry &
java -Djava.security.policy=policy RMIServer localhost 1099 &
java -Djava.security.policy=policy RMIClient localhost 1099

The problem is with the next command from a remote host:

java -Djava.security.policy=policy RMIClient adam 1099
java.rmi.ConnectException: Connection refused to host: 127.0.0.1; nested exception is:
java.net.ConnectException: Connection refused

Why is it connecting to 127.0.0.1? That's the local loopback interface -
you know about that, right? If the client and server are on different
machines, that doesn't seem like a totally likely to work thing to do.
What's your /etc/hosts look like? What to you get if you do 'ping adam'?

A simple but good diagnostic tool in situations like this is telnet. On
the client machine, telnet to port 1099 on the server machine. If you
manage to make a connection, you know that there's nothing wrong at the
network level, and any problem must be in the program. If you can't make a
connection, you know there's trouble with the network - firewalls, DNS,
routing, something like that.

tom

--
Argumentative and pedantic, oh, yes. Although it's properly called
"correct" -- Huge