'localhost' does not resolve to ipv6 address

[bastiK]

Remotecontrol does not find ipv6 address for localhost:

INFO: Detected useable IPv6 network, prefering IPv6 over IPv4 after next restart.
ERROR: java.net.UnknownHostException
java.net.UnknownHostException
	at org.openstreetmap.josm.io.remotecontrol.RemoteControl.getInet6Address(RemoteControl.java:105)
	at org.openstreetmap.josm.io.remotecontrol.RemoteControlHttpServer.<init>(RemoteControlHttpServer.java:75)
	at org.openstreetmap.josm.io.remotecontrol.RemoteControlHttpServer.restartRemoteControlHttpServer(RemoteControlHttpServer.java:37)
	at org.openstreetmap.josm.io.remotecontrol.RemoteControl.start(RemoteControl.java:48)
	at org.openstreetmap.josm.gui.MainApplication.main(MainApplication.java:496)
INFO: RemoteControl::Accepting secure IPv4 connections on localhost/127.0.0.1:8112

$ cat /etc/hosts
127.0.0.1	localhost
127.0.1.1	myhost

# The following lines are desirable for IPv6 capable hosts
::1     ip6-localhost ip6-loopback
fe00::0 ip6-localnet
ff00::0 ip6-mcastprefix
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters

Build-Date: 2015-05-06 23:20:12
Revision: 8337
Is-Local-Build: true

Identification: JOSM/1.5 (8337 SVN en) Linux Ubuntu 14.04.2 LTS
Memory Usage: 150 MB / 1763 MB (80 MB allocated, but free)
Java version: 1.7.0_79, Oracle Corporation, OpenJDK 64-Bit Server VM
Java package: openjdk-7-jre:amd64-7u79-2.5.5-0ubuntu0.14.04.2


Last errors/warnings:
- E: java.net.UnknownHostException

[Don-vip]

same problem than #11409 no?

[stoecker]

Closed as duplicate of #11409.

[stoecker]

Beside the duplication - the /etc/hosts is broken. localhost should also be assigned to "::1".

[bastiK]

This is the default /etc/hosts file for Debian/Ubuntu. (Which is more than 50% of Linux users, as seen by the JOSM server.)

[stoecker]

You're right. My openSUSE server installations (preinstalled) also have this setting while the normal installs from DVD don't have it. Don't know who invented that. Probably same type of people who did the broken Java code.

Some sort of "backwards compatibility" which will prevent IPv6 from ever working as expected.

[skyper]

Strange my Debian wheezy version includes ipv6:

$ cat /etc/hosts
127.0.0.1       localhost
127.0.1.1       $HOSTNAME

# The following lines are desirable for IPv6 capable hosts
::1     localhost ip6-localhost ip6-loopback
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters

[stoecker]

That's the right way. But to reduce trouble with broken software localhost for ::1 was removed for some years (i.e. we hide the error instead of fixing it). I was not aware that even recent installations do this.