FULL PRODUCT VERSION :
java version " 1.8.0-ea "
Java(TM) SE Runtime Environment (build 1.8.0-ea-b92)
Java HotSpot(TM) 64-Bit Server VM (build 25.0-b34, mixed mode)


java version " 1.7.0_17 "
Java(TM) SE Runtime Environment (build 1.7.0_17-b02)
Java HotSpot(TM) 64-Bit Server VM (build 23.7-b01, mixed mode)


ADDITIONAL OS VERSION INFORMATION :
Darwin macbook-retina.speedport.ip 12.4.0 Darwin Kernel Version 12.4.0: Wed May 1 17:57:12 PDT 2013; root:xnu-2050.24.15~1/RELEASE_X86_64 x86_64

EXTRA RELEVANT SYSTEM CONFIGURATION :
bug occurs with 1.7.0_17 and 1.8.0b92

A DESCRIPTION OF THE PROBLEM :
InetAddress.getLocalHost() returns wrong IP address although the addresses returned by NetworkInterface.getNetworkInterfaces() are correct.
The call to InetAddress.getAddressesFromNameService(local, null); inside InetAddress.getLocalHost() returns the wrong IP resulting from a buggy DNS lookup implementation.

An iteration over the NetworkInterface.getNetworkInterfaces() returns the correct IP addresses:
   iadr: /fe80:0:0:0:baf6:b1ff:fe10:c74b%4
   iadr: /192.168.5.179
But InetAddress.getLocalAddress() returns the correct FQDN but the IP address of the DNS server.
    192.168.56.1


Shell command output:

macbook-retina:java snazy$ host macbook-retina.speedport.ip
macbook-retina.speedport.ip has address 192.168.5.179

macbook-retina:java snazy$ nslookup macbook-retina.speedport.ip
Server:192.168.5.1
Address:192.168.5.1#53

Name:macbook-retina.speedport.ip
Address: 192.168.5.179



REGRESSION. Last worked in version 7u25

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Call " InetAddress.getLocalHost() " on MacOS and check returned IP address.

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
InetAddress.getLocalHost() must return correct IP address.

ACTUAL -
InetAddress.getLocalHost() returns DNS server address.


Output from JUnit test case:

macbook-retina.speedport.ip/192.168.56.1
192.168.56.1
netIf en0 has inet /fe80:0:0:0:baf6:b1ff:fe10:c74b%4/64 [null]
netIf en0 has inet /192.168.5.179/24 [/192.168.5.255]
netIf lo0 has inet /0:0:0:0:0:0:0:1/128 [null]
netIf lo0 has inet /fe80:0:0:0:0:0:0:1%1/64 [null]
netIf lo0 has inet /127.0.0.1/0 [null]

java.lang.AssertionError: local address no

REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------

import org.junit.Assert;
import org.junit.Test;

import java.net.*;
import java.util.Arrays;
import java.util.Enumeration;

@SuppressWarnings( " UseOfSystemOutOrSystemErr " )
public class OwnIpTest {
    @Test
    public void ownIp() throws UnknownHostException, SocketException {
        InetAddress local = InetAddress.getLocalHost();

        System.out.println(local);
        System.out.println(local.getHostAddress());

        boolean found = false;

        for (Enumeration<NetworkInterface> eni = NetworkInterface.getNetworkInterfaces(); eni.hasMoreElements(); ) {
            NetworkInterface ni = eni.nextElement();
            for (InterfaceAddress interfaceAddress : ni.getInterfaceAddresses()) {
                System.out.println( " netIf " + ni.getDisplayName() + " has inet " + interfaceAddress);
                if (Arrays.equals(local.getAddress(), interfaceAddress.getAddress().getAddress())) {
                    found = true;
                    System.out.println( " found local address in network interface " + ni.getDisplayName());
                }
            }

        }

        Assert.assertTrue( " local address not found in any network interface " , found);
    }
}

---------- END SOURCE ----------