Inter Node Communication

[Todd Wright]

Todd Wright wrote:
> 
> Attached below is an updated version of the simple RMI "echo" test.  
> This version works with Cougaar 12.4+.
> 
> Please see the zip's README for details.

Sorry, the server blocked the attachment.

I've uploaded the zip to the website:
   http://mts.cougaar.org/

Todd

> 
> Todd
> 
> Todd Wright wrote:
>> On Wednesday 08 June 2005 10:25, Aaron Helsinger wrote:
>>> Based on the fact that the error message says "127.0.0.1", this suggests
>>> that  Node B is still looking at localhost for the WP server. Are you
>>> sure that alpreg.ini was edited on both machines?
>>
>> Right, both "alpreg.ini" files should contain the same hostname (not 
>> "localhost").
>>
>> I've also seen this error when the `hostname` returns "localhost", due 
>> to a system configuration problem in /etc/hosts.  In your case, node 
>> "A" thinks that its IP address is "127.0.0.1", which confuses node "B" 
>> when it finds this address through the usual Cougaar naming service 
>> startup.
>>
>> I've attached a trimmed-down example that should help you debug.  Run 
>> "./compile" to compile, then start the server on one host:
>>   ./runServer
>> On a remote host, run the client with the URI printed by the above 
>> server command, e.g.:
>>   ./runClient rmi://123.45.67.89:38335/EchoServer_Stub/1_e..
>> The client should print "hello".
>> In your config I expect the server to print a URI starting with 
>> "rmi://127.0.0.1".
>>
>> Todd
>>
>>> Andie Kurniawan wrote:
>>>> Hello,
>>>>
>>>> I have been following the 'Introduction to Cougaar Programming' by
>>>> Mark Barger. I stuck in the last example where two agents located
>>>> across two machines are communicated (example 11).
>>>>
>>>> Based on the presentation slides, I have modified 'alpreg.ini' to
>>>> change localhost to the hostname (I put the IP address of the first
>>>> machine) on both machines and then start Exercise11A before ExerciseB.
>>>>
>>>> On the first machine where the nameserver is located, there was no
>>>> error message. However, on the other machine, I received the following
>>>> message
>>>>
>>>> WARN [DestinationQueueImpl] - Exercise11B: Failure in communication,
>>>> message The source: Exercise11B The Target: Exercise11A The Message
>>>> Id: 0 caused by
>>>> java.rmi.ConnectException: Connection refused to host: 127.0.0.1;
>>>> nested exception is:
>>>>  java.net.ConnectException: Connection refused
>>>>
>>>> Just for some additional information, both of the machines are running
>>>> Ubuntu Linux and using java version 1.4.2.
>>>>
>>>> Any help will be appreciated.
>>>>
>>>> Best Wishes,
>>>> Andie Kurniawan
>>>>
>>>> _______________________________________________
>>>> Cougaar-developers mailing list
>>>> Cougaar-developers at cougaar.org
>>>> http://cougaar.org/mailman/listinfo/cougaar-developers
>>> _______________________________________________
>>> Cougaar-developers mailing list
>>> Cougaar-developers at cougaar.org
>>> http://cougaar.org/mailman/listinfo/cougaar-developers
>>>
>>> ------------------------------------------------------------------------
>>>
>>> _______________________________________________
>>> Cougaar-developers mailing list
>>> Cougaar-developers at cougaar.org
>>> http://cougaar.org/mailman/listinfo/cougaar-developers
> 
> ------------------------------------------------------------------------
> 
> This is a message from the MailScanner E-Mail Virus Protection Service
> ----------------------------------------------------------------------
> The original e-mail attachment "rmi_encode_test.zip"
> is on the list of unacceptable attachments for this site and has been
> replaced by this warning message.
> 
> Due to limitations placed on us by the Regulation of Investigatory Powers
> Act 2000, we were unable to keep a copy of the original attachment.
> 
> At Fri Jan 18 13:43:46 2008 the virus scanner said:
>    MailScanner: Batch files are often malicious (runServer.bat)
>    MailScanner: Batch files are often malicious (compile.bat)
>    MailScanner: Batch files are often malicious (runClient.bat)
> 
> 
> 
> ------------------------------------------------------------------------
> 
> _______________________________________________
> Cougaar-developers mailing list
> Cougaar-developers at cougaar.org
> http://cougaar.org/mailman/listinfo/cougaar-developers