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[protege-discussion] Protege on the Amazon Cloud and webstart question

Timothy Redmond tredmond at
Fri Nov 4 14:05:29 PDT 2011

I don't know how the Amazon Cloud works in detail but you may get more 
information about how things work from reading [1].  In particular it is 
quite likely that you actually need to perform "black magic trick #2" 
but I don't know how this is set up.  In any case, these pages should 
give you a picture of how RMI works and how you can use the


parameter as well.

But you should be warned that several people have tried these techniques 
in the past and found them very difficult.  You have to have a detailed 
understanding of networks in specifically the network configuration of 
the amazon cloud servers to make this work.



On 11/04/2011 06:23 AM, Dennis Pierson wrote:
> Hi,
> I'm trying to use Protégé 3.4.7 server on the Amazon Cloud, on Ubuntu 
> 10.4. I can use a client on the same cloud instance, but cannot 
> connect from outside. From the error message, it looks like the RMI 
> server is registering the internal cloud URL with the registry, not 
> visible outside the cloud, instead of the DNS URL. Does anyone know 
> how to get this working?
> Also, I have not been able to get the WebStart client to connect under 
> any circumstances. The client downloads ok, but complains about 
> networks and ports, even on localhost without a firewall. Does anybody 
> have a jnlp file that works on localhost:8080 using ports 5100 for the 
> registry and 5200 for the server? Would greatly appreciate some help.
> Incidentally, should I use 4.x for client-server now?
> Thanks,
> *Dennis Pierson *|Senior Architect, Financial Services|*M **P H A S I 
> **S***/an HP Company/|460 Park Avenue South, Suite 1101, New York, NY 
> 10016|Fax:  (212) 686 2422|Mobile: (215) 622 1650| 
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