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java.rmi.ConnectException: Connection refused to host

Chad Naber
Greenhorn

Joined: Mar 25, 2005
Posts: 8
Hi folks,

I am having a problem setting up RMI using WebSphere 5.1.1.10 on AIX. When I start the JVM, rebinding succeeds. However, when I go into the application and make an RMI call, here is the error message I am seeing:

-------------------------

[12/8/06 16:11:10:498 UTC] 3e141124 SystemErr R java.rmi.ConnectException: Connection refused to host: 159.202.158.9; nested exception is:
java.net.ConnectException: Connection refused
[12/8/06 16:11:10:499 UTC] 3e141124 SystemErr R at sun.rmi.transport.tcp.TCPEndpoint.newSocket(TCPEndpoint.java:585)

-------------------------

The two servers are 158.8 and 158.9

rmiregistry is running on port 1099 on both, when I netstat -an I see port 1099 listening on both. rmiregistry was started before the JVM came up. Also if I telnet to 159.203.158.9 1099 from 158.8, it works, and vice versa.

Going crazy here. Any ideas?
[ December 08, 2006: Message edited by: Chad Naber ]
Chad Naber
Greenhorn

Joined: Mar 25, 2005
Posts: 8
So I determined what the problem is here, and I thought I would post the solution for everyone's reference:

There is a problem with AIX machines that have 2 NICs and IBM WebSphere.
If you have 2 IPs on the AIX machine, WebSphere uses the first IP in the hosts file for rmiregistry regardless of the rmi deployment descriptors.

The fix is to use these parameters
when starting rmiregistry:

#rmiregistry 1099 -Djava.rmi.useLocalHostName=true
-Djava.rmi.server.hostname=ipaddressofthismachinerunningrmi

The ip address is the local ip of the host computer in the \etc\hosts\ file.
 
It is sorta covered in the JavaRanch Style Guide.
 
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