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Java Djava.net.preferIPv6Stack=true + JOSM prefer.ipv6=true = Timeout
Java Djava.net.preferIPv4Stack=true + JOSM prefer.ipv6=true = Works
Java Djava.net.preferIPv6Stack=true + JOSM prefer.ipv6=false = Works
Java Djava.net.preferIPv4Stack=true + JOSM prefer.ipv6=false = Works

In summary: JOSM since r5893/josm in default config now fails on a machine with a broken IPv6 stack.

comment:12 by iandees, 11 years ago

On my MacOS X 10.8.2 box running Java(TM) SE Runtime Environment (build 1.6.0_43-b01-447-11M4203) r5899/josm fails. I have an ipv6 address but it's probably just from my wireless router and isn't routable.

comment:13 by stoecker, 11 years ago

In 5900/josm:

Java IPv6 is so broken, it can't be enabled by default (fix #8627, see #8562)

comment:14 by stoecker, 11 years ago

Also wanted to do a stackoverflow question once :-)

http://stackoverflow.com/questions/16164175

Maybe others know more about Java and IPv6.

comment:15 by Don-vip, 11 years ago

upvoted as well :)

comment:16 by Don-vip, 11 years ago

Keywords:	java7 added
Resolution:	fixed
Status:	closed → reopened

So we can reopen a ticket :)
I think this is something we should only care about after Java 7 transition.
Loking at IPV6-related JDK bugs, I see plenty of ones fixed between 7 and 7u1. There's no hope to have a valid implementation with Java 6.

comment:17 by Manu1400, 11 years ago

Keywords:	ipv6 network added

comment:18 by saerdnaer, 9 years ago

Any updates on this issue?

comment:19 by stoecker, 9 years ago

No. Java still does their own stuff instead of using the local solver. You can set "prefer.ipv6=true" if you have a working IPv6 connection and it should have no negative effects. But we can't make it default.

Maybe we can test it? Try connecting to "josm.openstreetmap.de" with IPv6 and when it works set prefer IPv6 when "prefer.ipv6=auto" is auto (and make "auto" default)?

comment:20 by saerdnaer, 9 years ago

I have an IPv6-only OSM API endpoint at http://maps.testi.ber.c3voc.de:3000/api which I can't reach, even when I set "prefer.ipv6=true" and restarted JOSM on Mac OS X 10.10.

comment:21 by stoecker, 9 years ago

Milestone:	→ 15.05

Did you have a look wireshark to see what JOSM actually tries to do? What error messages do you get (or what console outputs). For a working IPV6 setup "prefer.ipv6=true" should not be necessary at all to reach an IPv6 only target.

I get this (without special ipv6 setting):

INFO: GET http://maps.testi.ber.c3voc.de:3000/api/0.6/user/details (Anzahl der ungelesenen Nachrichten abrufen)
WARNUNG: org.openstreetmap.josm.io.OsmApiException: ResponseCode=401
org.openstreetmap.josm.io.OsmApiException: ResponseCode=401

called josm with

java -jar josm-latest.jar --set=osm-server.url=http://maps.testi.ber.c3voc.de:3000/api

comment:22 by stoecker, 9 years ago

Nice, Actually "prefer.ipv6" is totally useless, because changing it during runtime has no effect. Only works as a java commandline option. Java IPv6 support is still completely broken.

comment:23 by stoecker, 9 years ago

Ah no, it's even more complex. It works as is set before first network access, but an autodetect does not work, as this causes first network access and afterwards changing this is useless. Bloody hell!