Name: rmT116609 Date: 08/29/2002


FULL PRODUCT VERSION :
java version "1.4.0"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.0-b92)
Java HotSpot(TM) Client VM (build 1.4.0-b92, mixed mode)

also:

java version "1.4.1-rc"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.1-rc-b19)
Java HotSpot(TM) Client VM (build 1.4.1-rc-b19, mixed mode)

FULL OPERATING SYSTEM VERSION :
glibc-2.2.5-34
Linux 2.4.18-3
Red Hat Linux release 7.3 (Valhalla)

ADDITIONAL OPERATING SYSTEMS :
Also occurs on Win2K and WinNT


A DESCRIPTION OF THE PROBLEM :
The getLocalPort method returns 0 (after calling bind) for SocketChannel Sockets. This method works for Sockets obtained using new Socket(). getLocalAddress doesn't work for SocketChannel Sockets either.

I don't see the same problem with DatagramSockets.

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
1.Obtain a SocketChannel
2.Grab the Socket from the SocketChannel
3.Bind the Socket
4.Determine the LocalPort for the bound socket

EXPECTED VERSUS ACTUAL BEHAVIOR :
I expect to get the actual port number. The actual result is 0.

REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
import java.net.*;
import java.nio.channels.*;

public class Example {

  public static void main(String[] args) throws Exception {
    SocketChannel c = SocketChannel.open();
    Socket s = c.socket();
    s.bind(null);
    int port = s.getLocalPort(); // returns 0 ...
    System.out.println(port);

    Socket s2 = new Socket();
    s2.bind(null);
    int port2 = s2.getLocalPort(); // returns the port
    System.out.println(port2);
  }
}
---------- END SOURCE ----------

CUSTOMER WORKAROUND :
I need to know the port number before connecting, so the only work-around is to not use nio, i.e., fallback to blocking Socket IO.
(Review ID: 163743)
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