See http://serverfault.com/questions/698135/unknownhostexception-when-enabling-jmx-in-java-8

GetLocalHostInfo.java

package java.net;

public class GetLocalHostInfo {

    public static InetAddressImpl impl;

    public static void main( final String[] args ) {

        try {
            InetAddress.getLoopbackAddress();
            System.out.println( "java.version    : " + System.getProperty( "java.version" ) );
            System.out.println( "preferIPv4Stack : "
                    + System.getProperty( "java.net.preferIPv4Stack" ) );

            impl = InetAddressImplFactory.create();
            System.out.println( "isIPv6Supported : " + InetAddressImplFactory.isIPv6Supported() );

            getInfo();

        } catch ( final UnknownHostException e ) {
            e.printStackTrace();

        } finally {
            System.out.println( "-------------------------------------------------" );

        }

    }

    static void getInfo() throws UnknownHostException {

        try {
            System.out.println( "InetAddressImpl : " + impl.getClass().getName() );
            System.out.println( "getLocalHostName: " + impl.getLocalHostName() );
            System.out.println( "getLocalHost    : " + InetAddress.getLocalHost() );

        } catch ( final Exception e ) {
            e.printStackTrace();
        }
    }
}

getlocalhostinfo.sh

#!/bin/sh¬
¬
(cd /path/to/this/proj && /java/jdk-${1:-8}/bin/java \¬
-Djava.net.preferIPv4Stack=${2:-false} \¬
-Xbootclasspath/p:. java.net.GetLocalHostInfo )¬

test

$ ~/GC-4380/getlocalhostinfo.sh 8
java.version    : 1.8.0_45
preferIPv4Stack : false
isIPv6Supported : true
InetAddressImpl : java.net.Inet6AddressImpl
getLocalHostName: mybox
getLocalHost    : mybox/185.69.214.74
-------------------------------------------------

$ ~/GC-4380/getlocalhostinfo.sh 7
java.version    : 1.7.0_45
preferIPv4Stack : false
isIPv6Supported : true
InetAddressImpl : java.net.Inet6AddressImpl
getLocalHostName: mybox
getLocalHost    : mybox/185.69.214.74
-------------------------------------------------

$ ~/GC-4380/getlocalhostinfo.sh 7 true
java.version    : 1.7.0_45
preferIPv4Stack : true
isIPv6Supported : false
InetAddressImpl : java.net.Inet4AddressImpl
getLocalHostName: mybox
getLocalHost    : mybox/185.69.214.74
-------------------------------------------------

$ ~/GC-4380/getlocalhostinfo.sh 8 true
java.version    : 1.8.0_45
preferIPv4Stack : true
isIPv6Supported : false
InetAddressImpl : java.net.Inet4AddressImpl
getLocalHostName: 185-69-214-74.ded.intelignet.com.br
java.net.UnknownHostException: 185-69-214-74.ded.intelignet.com.br: 185-69-214-74.ded.intelignet.com.br: unknown error
        at java.net.InetAddress.getLocalHost(InetAddress.java:1483)
        at java.net.GetLocalHostName.getInfo(GetLocalHostName.java:35)
        at java.net.GetLocalHostName.main(GetLocalHostName.java:18)
Caused by: java.net.UnknownHostException: 185-69-214-74.ded.intelignet.com.br: unknown error
        at java.net.Inet4AddressImpl.lookupAllHostAddr(Native Method)
        at java.net.InetAddress$2.lookupAllHostAddr(InetAddress.java:907)
        at java.net.InetAddress.getAddressesFromNameService(InetAddress.java:1302)