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problem opening port 900 on mac os x

 
Greenhorn
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hi i am new to client server programming, also java, and I tried using a new external tool called tnameserver in ecllipse, and when i tried running this tool I got an error as follows:

Feb 4, 2007 8:35:45 PM com.sun.corba.se.impl.transport.SocketOrChannelAcceptorImpl initialize
SEVERE: "IOP00410216: (COMM_FAILURE) Unable to create listener thread on the specified port: 900" and much more continued

my professor says that
Possible causes are:
1) You are using a Linux/Unix or Mac machine. These Operating system prohibit non-root opening a socket on any port < 1024.
2) You already have another application listening on port 900. If you
are using Windows, "netstat -nao" will show you which one it is. If you
are using some other OS, you'll have to find the command yourself

please help.
 
Rancher
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Welcome to JavaRanch.

I'd say your professor is right.
[ February 05, 2007: Message edited by: Ulf Dittmer ]
 
hiteshkumar ubharani
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I have found the command its netstat again for mac, but still wondering what next
 
Ranch Hand
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netstat tells you which ports are occupied.
 
hiteshkumar ubharani
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but the question still remains, how to address different port for initializing socket, as my port 900 is occupied.
 
Bartender
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IntelliJ IDE Spring Java
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You could read the documentation ... all the command line options for tnameserv are listed there. (Including one that lets you specify the port...)
 
Don't get me started about those stupid light bulbs.
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