InetAddress java 8 is not getting the hostname

Question

InetAddress.getLocalHost().getHostName() is no more getting the name of the HostName since I switched to java 8 ...

with the jdk1.8 the InetAddress.getLocalHost().getHostName() returns "localhost". Before (when I was using jdk1.6) it gives me the right hostname (which is "ACTION03") according to the network config :

cat /etc/sysconfig/network
NETWORKING=yes
HOSTNAME=ACTION03

any help ?

You had two host entries for localhost in your host file prior to edit. Not sure if that has something to do with it. Perhaps without one to one mapping, it gives localhost? Would need to test it. Unsure of the correct behavior, but it otherwise works for me. — ManoDestra, Jul 28 '16 at 13:10

score 2 · Answer 1 · answered Jul 28 '16 at 18:27

2

There was similar bug fired in JDK.

What I understand is that they changed default resolution process.

They honor configuration in /etc/nsswitch.conf where hosts are configured for /etc/hosts that gives it main priority for name resolution.

Usually /etc/hosts has record for 127.0.0.1 localhost that provide name for host localhost

answered Jul 28 '16 at 18:27

Nazarii Bardiuk

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You made my day! – mulya Mar 22 '17 at 16:06

score 1 · Answer 2 · answered Jul 28 '16 at 03:41

1

Works for me on Linux (Ubuntu 14.04) with Java 1.8.0_05.

public class HostName {
    public static void main(String[] args) throws Exception {
        System.out.println(java.net.InetAddress.getLocalHost().getHostName());
    }
}

robert@habanero:~$ javac HostName.java && java HostName

habanero

answered Jul 28 '16 at 03:41

Robert

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Me I have Centos 7 ! And it gives me localhost! – Mohamed Taboubi Jul 28 '16 at 03:43

InetAddress java 8 is not getting the hostname

2 Answers2

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