java.net.SocketException: Permission denied: listen failed

[vitaliy]

Hello,

I'm experiencing the weirdest problem ever -
it seems that I"m unable to open a java server socket on my machine.

Here is a sample code that demonstrates my problem:

Code:

import java.io.IOException;
import java.net.*;

public class SocketTest 
{

/**
* @param args
*/
public static void main(String[] args) 
{

ServerSocket myService;

try
{
myService = new ServerSocket(8080);
System.out.println("successfully opened a socket");

}
catch (IOException e) 
{
e.printStackTrace();
System.out.println(e);
}


}

}

Here is the exception that I get:

Code:

java.net.SocketException: Permission denied: listen failed
at java.net.PlainSocketImpl.socketListen(Native Method)
at java.net.PlainSocketImpl.listen(Unknown Source)
at java.net.ServerSocket.bind(Unknown Source)
at java.net.ServerSocket.<init>(Unknown Source)
at java.net.ServerSocket.<init>(Unknown Source)
at SocketTest.main(SocketTest.java:18)
java.net.SocketException: Permission denied: listen failed

I'm trying to run this app on winxp machine, jre 1.5.0_11.
This problem also happens not ony while running this application, but while trying to start other java applications like tomcat.

If I try to connect to already used port, I get a different exception, so I know this port is free.
I've already tried to reinstall the jre, as well as rebooting my machine.
Also I have no firewall or antivirus running.


Any help is highly appreciated!

Thanks,
Vitaliy

[JavaBean]

Hi Vitaliy,

The port should be used by another application. Windows XP has a built-in firewall. It might be the reason.

[vitaliy]

The windows firewall was down.

Anyway I've managed to resolve the problem -
I've reinstalled the jre at a different location -
and it works.