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NIO + IPv6 + Windows XP (SP2) + jdk 1.5.0_01 => Problem ?
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Hello everybody,

In the _sample_ code below, I listen on port 8501 using a ServerSocket
instance and on port 8502 by going through a NIO ServerSocketChannel.

Using jdk-1.5.0_01 (and the jre that comes embedded with it), this code
works fine on Linux and Solaris boxes. However, running it on a Windows
XP SP2 machine (with ipv6 installed and running and with no other older
Java left installed), the attempt to go through the NIO channel throws
a "Address family not supported by protocol
family" exception.

Strangely enough, binding the ServerSocket instance works, as
demonstrated by the code output. (using netstat -a also shows that
the port is listening). So, the probleme is not IPv6 by itself, but
using it via an NIO server socket channel.

Any idea ?

(Note: this post is a repost from the Socket Java forum of Sun)

import java.nio.channels.ServerSocketChannel;

class ipv6 {
static public void main(String[] notUsed) {
try {
byte[] addr = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,

InetAddress inetAddr = InetAddress.getByAddress(addr);

InetSocketAddress addr_8501 = new
InetSocketAddress(inetAddr, 8501);
InetSocketAddress addr_8502 = new
InetSocketAddress(inetAddr, 8502);

System.out.println("==> 1");

ServerSocket serverSocket = new ServerSocket();
serverSocket.bind(addr_8501); // This works

System.out.println("==> 2");

ServerSocketChannel channel =;
channel.socket().bind(addr_8502); //This does not work on
the Windows XP box.

System.out.println("==> 3");
} catch (Throwable t) {

Running it on the Windows box results in:

==> 1
==> 2 Address family not supported by protocol
family: bind
at Method)
at external.ipv6.main(

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