Cannot establish RMI connection to remote machine

Question

I can't seem to connect 2 machines using RMI. To make sure there wasn't something wrong with my code I copied the simple example from wikipedia (http://en.wikipedia.org/wiki/Java_remote_method_invocation) and I edited the code to print out a simple int.

I tried giving all permissions and turning all the firewalls off and I still get this error:

java.rmi.ConnectException: Connection refused to host 55.229.xx.xxx; nested 
exception is:java.net.ConnectException: Connection timed out: connect

I've been trying to do this for the past 3 days and I still can't seem to get past basic configuration problems.

Yes. But I tried to swap, running the server on Windows and the client on Linux. I still couldn't make it work — spacitron, Jul 17 '13 at 15:27

score 5 · Answer 1 · answered Jul 17 '13 at 16:09

5

The Problem could be your RMI server is sending back its local address, instead of WAN address.

System.setProperty("java.rmi.server.hostname", *host IP*);

also take a look at security policies regarding RMI: http://docs.oracle.com/javase/tutorial/rmi/running.html

answered Jul 17 '13 at 16:09

sigi

189
3
9

Still, connection timed out. – spacitron Jul 17 '13 at 16:18
1

+1 for the `java.rmi.server.hostname` solution only. Security policies have nothing to do with it. – user207421 Jul 19 '13 at 02:48

score 0 · Answer 2 · answered Jul 17 '13 at 15:38

0

Check your firewall settings on your aws instance RMI is running on 1099 port by default as i remember.

answered Jul 17 '13 at 15:38

sigi

189
3
9

Cannot establish RMI connection to remote machine

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