On Jul 21, 2010, at 2:42 PM, Vincent Massol wrote:

> Hi,
> 
> I'm getting this error when running the tests for xwiki-observation-remote:
> 
> Caused by: java.lang.RuntimeException: the type of the stack (IPv6) and the 
> user supplied addresses (IPv4) don't match: localhost/127.0.0.1.
> Use system props java.net.preferIPv4Stack or java.net.preferIPv6Addresses to 
> pick the correct stack
>        at 
> org.jgroups.stack.Configurator.setupProtocolStack(Configurator.java:108)
>        at 
> org.jgroups.stack.Configurator.setupProtocolStack(Configurator.java:54)
>        at org.jgroups.stack.ProtocolStack.setup(ProtocolStack.java:453)
>        at org.jgroups.JChannel.init(JChannel.java:1702)
> 
> This thread explains the problem:
> http://old.nabble.com/Protocol-stack-issue-on-dual-stack-(IPv4-and-v6)-machines-td27544685.html
> 
> This issue has been created to track the problem:
> https://jira.jboss.org/browse/JGRP-1152
> 
> I've tested with jgroups 2.10.0.Beta2 and it works fine.
> 
> I've seen on http://jira.xwiki.org/jira/browse/XWIKI-4917 that jgroups 2.9 
> and above require JDK 6+.
> 
> What do we do?
> 
> Should we set the jgroups property to force ipv4 or ipv6?

For the record I've forced ipv4 in the functional tests for cluster in svn rev 
31963

Thanks
-Vincent

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