[jboss-jira] [JBoss JIRA] (JGRP-2023) Network unreachable with localhost addresses if -Djava.net.preferIPv4Stack=true isn't specified

[Bela Ban (JIRA)]

    [ https://issues.jboss.org/browse/JGRP-2023?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13171428#comment-13171428 ] 

Bela Ban commented on JGRP-2023:
--------------------------------

I'm not an IPv6 expert but does this look normal?
{noformat}
[bela at dev87 classes]$ ip -6 route show
unreachable ::/96 dev lo  metric 1024  error -101 mtu 65536 advmss 65476 hoplimit 0
unreachable ::ffff:0.0.0.0/96 dev lo  metric 1024  error -101 mtu 65536 advmss 65476 hoplimit 0
unreachable 2002:a00::/24 dev lo  metric 1024  error -101 mtu 65536 advmss 65476 hoplimit 0
unreachable 2002:7f00::/24 dev lo  metric 1024  error -101 mtu 65536 advmss 65476 hoplimit 0
unreachable 2002:a9fe::/32 dev lo  metric 1024  error -101 mtu 65536 advmss 65476 hoplimit 0
unreachable 2002:ac10::/28 dev lo  metric 1024  error -101 mtu 65536 advmss 65476 hoplimit 0
unreachable 2002:c0a8::/32 dev lo  metric 1024  error -101 mtu 65536 advmss 65476 hoplimit 0
unreachable 2002:e000::/19 dev lo  metric 1024  error -101 mtu 65536 advmss 65476 hoplimit 0
2620:52:0:105f::/64 dev eth0  proto kernel  metric 256  expires 2147089sec mtu 1500 advmss 1440 hoplimit 0
unreachable 3ffe:ffff::/32 dev lo  metric 1024  error -101 mtu 65536 advmss 65476 hoplimit 0
fe80::/64 dev eth0  proto kernel  metric 256  mtu 1500 advmss 1440 hoplimit 0
fe80::/64 dev eth1  proto kernel  metric 256  mtu 1500 advmss 1440 hoplimit 0
default via fe80::a0:98ff:fe05:fc dev eth0  proto kernel  metric 1024  expires 1732sec mtu 1500 advmss 1440 hoplimit 64
default via fe80:52:0:105f::fd dev eth0  proto kernel  metric 1024  expires 1732sec mtu 1500 advmss 1440 hoplimit 64
[bela at dev87 classes]$ 

{noformat}

> Network unreachable with localhost addresses if -Djava.net.preferIPv4Stack=true isn't specified
> -----------------------------------------------------------------------------------------------
>
>                 Key: JGRP-2023
>                 URL: https://issues.jboss.org/browse/JGRP-2023
>             Project: JGroups
>          Issue Type: Bug
>    Affects Versions: 3.6.7, 3.6.8
>         Environment: $ java -version
> java version "1.8.0_45"
> Java(TM) SE Runtime Environment (build 1.8.0_45-b14)
> Java HotSpot(TM) 64-Bit Server VM (build 25.45-b02, mixed mode)
>            Reporter: Richard Janík
>            Assignee: Bela Ban
>
> When setting {{-bind_addr}} to localhost (either 127.0.0.1 or ::1) without specifying {{-Djava.net.preferIPv4Stack=true}}, JGroups fail to connect. The following errors are logged:
> {code}
> -------------------------------------------------------------------
> GMS: address=rjanik-24069, cluster=draw, physical address=0:0:0:0:0:0:0:1:37921
> -------------------------------------------------------------------
> Mar 03, 2016 11:41:12 AM org.jgroups.protocols.TP$BaseBundler sendSingleMessage
> SEVERE: JGRP000029: rjanik-24069: failed sending message to cluster (108 bytes): java.io.IOException: Network is unreachable, headers: PING: [type=GET_MBRS_REQ, cluster=draw], TP: [cluster_name=draw]
> ** View=[rjanik-24069|0] (1) [rjanik-24069]
> Mar 03, 2016 11:41:15 AM org.jgroups.protocols.TP$BaseBundler sendSingleMessage
> SEVERE: JGRP000029: rjanik-24069: failed sending message to cluster (56 bytes): java.io.IOException: Network is unreachable, headers: NAKACK2: [MSG, seqno=1], TP: [cluster_name=draw]
> {code}
> I'm not sure if there's some other configuration option that I forgot to add, but the example (in Steps to Reproduce) works with previous versions (3.6.6 for example), so I assume not.



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