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RMI Problem - Urgent

Posted on 2002-04-02
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Last Modified: 2008-03-06
hi experts,

I'm writing an RMI application. The ServerRMI has been started successfully. When running the ClientRMI I get the following exception:

java.rmi.RemoteException: java.net.ConnectException: Connection refused; nested exception is:
        java.net.ConnectException: Connection refused
java.net.ConnectException: Connection refused
        at java.net.PlainSocketImpl.socketConnect(Native Method)
        at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:301)
        at java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:121)
        at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:108)
        at java.net.Socket.<init>(Socket.java:265)
        at java.net.Socket.<init>(Socket.java:94)
        at com.objectspace.voyager.LightProxy.newSocket(LightProxy.java:634)
        at com.objectspace.voyager.LightProxy.getCnxOS(LightProxy.java:588)
        at com.objectspace.voyager.LightProxy.osinv(LightProxy.java:453)
        at com.objectspace.voyager.LightProxy.osinvHC(LightProxy.java:406)
        at com.objectspace.voyager.LightProxy.inv(LightProxy.java:389)
        at com.objectspace.voyager.LightProxy.vI(LightProxy.java:294)
        at com.i2.iba.session.SessionServer_IProxy__Proxy__LightProxy.test(Unknown Source)
        at com.i2.iba.session.I2Session.main(I2Session.java:25)

I have already created and open a port(8888) for it and create the stubs and the skeletons using rmic tool. Do I need to set any security policy? I have already added two policy into java.policy.

permission java.net.SocketPermission "*:1024-65535", "connect,accept";
permission java.net.SocketPermission "*:8888", "connect";

It still doesn't work. Please give me help. Thanks!!
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Question by:wilsontang
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7 Comments
 
LVL 9

Expert Comment

by:Venci75
ID: 6912828
It looks that your client tries to connect to a wrong port or this host (port) is not accessible from the client machine. May the problem is that you can't connect to the RMI registry. To check this, try to establish a connection with the telnet application from the client host:
telnet <registry host> <registry port>
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Author Comment

by:wilsontang
ID: 6914836
hi Venci75,
     I tried to run "nmap" command and the output as follows:
Port       State       Service
21/tcp     open        ftp
25/tcp     open        smtp
135/tcp    open        loc-srv
139/tcp    open        netbios-ssn
465/tcp    open        smtps
1433/tcp   open        ms-sql-s
5800/tcp   open        vnc
5900/tcp   open        vnc
8888/tcp   open        sun-answerbook

So port 8888 is already open. I think the telnet service doesn't care. It uses tcp to make a connection via port 8888, right? How about rmi registry? Do i need to set it using a command "rmiregistry"? How can I check this table?
Thanks a lot!!
 
0
 

Author Comment

by:wilsontang
ID: 6914854
hi Venci75,
     I tried to run "nmap" command and the output as follows:
Port       State       Service
21/tcp     open        ftp
25/tcp     open        smtp
135/tcp    open        loc-srv
139/tcp    open        netbios-ssn
465/tcp    open        smtps
1433/tcp   open        ms-sql-s
5800/tcp   open        vnc
5900/tcp   open        vnc
8888/tcp   open        sun-answerbook

So port 8888 is already open. I think the telnet service doesn't care. It uses tcp to make a connection via port 8888, right? How about rmi registry? Do i need to set it using a command "rmiregistry"? How can I check this table?
Thanks a lot!!
 
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LVL 9

Expert Comment

by:Venci75
ID: 6915155
In addition to the client and the server you have to start the rmi registry (rmiregistry from the java bin directory).
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LVL 1

Expert Comment

by:Moondancer
ID: 6961434
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Expert Comment

by:Venci75
ID: 7932516
No comment has been added lately, so it's time to clean up this TA.
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