Please provide the parameters used to launch the testsuite. I can't figure out what that test job is doing from clicking around for a couple minutes.

I doubt it's doing anything mysterious; I just want to know exactly what.

For example, our IPv6 jobs on lightning pass the following to maven:

-DallTests -Dmaven.test.failure.ignore=true -DfailIfNoTests=false -Dorg.jboss.model.test.cache.strict=true -Dipv6 -Dnode0=::1 -Dnode1=::1 -DudpGroup=ff01::1

I use e.g. (depending on particular slave IP configuration) -DallTests -Dmaven.test.failure.ignore=true -Dipv6 -Dnode0=2620:52:0:105f::ffff:8 -Dnode1=2620:52:0:105f::ffff:9 -Dmcast=ff0e:52:0:105f:5054:ff:fe84:c43a -fae -DproxySet=true -DproxyHost=proxy-01-ipv6.mw.lab.eng.bos.redhat.com -DproxyPort=3128 '-DnonProxyHosts=localhost|127.*|[::0]|[::1]|[2620:52:0:105f::ffff:9]|[2620:52:0:105f::ffff:8]' '-Dhttp.nonProxyHosts=localhost|127.*|[::0]|[::1]|[2620:52:0:105f::ffff:9]|[2620:52:0:105f::ffff:8]'

The main difference is in node0 and node1 args, I don't use ::1. I believe using adresses different from each other and from localhost is better.

Better link for example result is: 
https://jenkins.mw.lab.eng.bos.redhat.com/hudson/job/eap-6x-as-testsuite-RHEL-matrix-OracleJDK8-pureIPV6/jdk=jdk1.8,label_exp=RHEL6-ipv6&&x86_64&&pure-ipv6/4/testReport/junit/org.jboss.as.test.integration.domain.management.cli/DomainDeploymentOverlayTestCase/testSimpleOverrideWithRedeployAffected/

What happens here is the test is passing an IPv6 zone id as part of the value of the 'host' param to the URI constructor. My guess is that is leading to the DNS problem.

I'm not sure what the exact problem is though.

There's a proposed RFC around that that describes how any such zone id should be URL escaped:

http://tools.ietf.org/html/rfc6874

e.g. in ::1%lo the '%' needs to be escaped. We're not doing that.

I don't know if escaping that would fix the problem or whether the problem is the presence of the zone id altogether. It's also possible it has nothing to do with the zone id, but I doubt that.

I have tried to read the "host" value with both JDK7(1.7.0_67) and JDK8 (1.8.0_20). As per previous comment, it will return different values once ipv6 is configured:

JDK7:
[domain@[::1]:9999 /] /host=master/server=server-one/socket-binding-group=full-sockets/socket-binding=http:read-attribute(name=bound-address)
{
    "outcome" => "success",
    "result" => "::1%1"
}

JDK8:
[domain@[::1]:9999 /] /host=master/server=server-one/socket-binding-group=full-sockets/socket-binding=http:read-attribute(name=bound-address)
{
    "outcome" => "success",
    "result" => "::1%lo"
}

In upstream WFLY master, for both cases, '%' is escaped as the return value is:
[domain@[::1]:9990 /] /host=master/server=server-one/socket-binding-group=full-sockets/socket-binding=http:read-attribute(name=bound-address)
{
    "outcome" => "success",
    "result" => "::1"
}

commit in https://github.com/wildfly/wildfly/pull/4706 makes this result for any loopback address, and eliminates '%lo', '%eth0'. But I'm not certain why the result varies in different JDK versions.

Is this still an issue? I am unable to reproduce it using Oracle JDK 1.8.0_20-b26 and current 6.x branch.

Just noticed that the error comes from the proxy server. So my understanding is that the issue is that the request go through the proxy even if it is not supposed to.

Is not the issuejust that the non-proxy host properties are not set up properly to match addresses containing zone id?

You're right, I don't see it with current configuration.

https://jenkins.mw.lab.eng.bos.redhat.com/hudson/job/eap-6x-as-testsuite-IPv6-rhel-1128087-JDK8test/jdk=java18_default,label_exp=linux-pure-ipv6/1/console

Thanks for assistance, closing as not_a_bug.