[ https://issues.jboss.org/browse/JGRP-1878?page=com.atlassian.jira.plugin.... ] Radoslav Husar edited comment on JGRP-1878 at 9/7/14 6:46 AM: -------------------------------------------------------------- I may have tracked down the JDK8 changes that are responsible for the behavior change we are observing: JDK8 Discussion http://mail.openjdk.java.net/pipermail/net-dev/2013-May/006246.html JDK8 Issues https://bugs.openjdk.java.net/browse/JDK-8014499 http://bugs.java.com/view_bug.do?bug_id=8014499 http://bugs.java.com/view_bug.do?bug_id=8014377 JDK8 Commits http://hg.openjdk.java.net/jdk8u/jdk8u/jdk/rev/bf2bacf934d1 http://hg.openjdk.java.net/jdk8u/jdk8u/jdk/rev/cd06fc069152 What this is esentially doing, they are now setting IP_MULTICAST_ALL=0 for DatagramChannels on Linux which is supported since kernel version 2.6.31 (http://man7.org/linux/man-pages/man7/ip.7.html). With JDK8 binding to different addresses on the same machine, the processes are not going to receive each other's messages. Some further reading: https://bugzilla.redhat.com/show_bug.cgi?id=231899 http://marc.info/?l=linux-netdev&m=121579002105636&w=2 was (Author: rhusar): I may have tracked down the JDK8 changes that are responsible for the behavior change we are observing: Issues: https://bugs.openjdk.java.net/browse/JDK-8014499 http://bugs.java.com/view_bug.do?bug_id=8014499 http://bugs.java.com/view_bug.do?bug_id=8014377 Commits http://hg.openjdk.java.net/jdk8u/jdk8u/jdk/rev/bf2bacf934d1 http://hg.openjdk.java.net/jdk8u/jdk8u/jdk/rev/cd06fc069152 What this is esentially doing, they are now setting IP_MULTICAST_ALL=0 for DatagramChannels on Linux which is supported since kernel version 2.6.31 (http://man7.org/linux/man-pages/man7/ip.7.html). With JDK8 binding to different addresses on the same machine, the processes are not going to receive each other's messages. Some further reading: https://bugzilla.redhat.com/show_bug.cgi?id=231899 http://marc.info/?l=linux-netdev&m=121579002105636&w=2 -- This message was sent by Atlassian JIRA (v6.3.1#6329)