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.