The 'jbossas' init script installed by the EAP RPM incorrectly sets the jboss.partition.udpPort system property which overrides the XML settings in the various JGroups protocol stack configurations. It also rendors the other JGroups UDP port properties that are being set useless.

The effect of this incorrect configuration is that all four cluster channels that exist in EAP 4.2 will see each other and complain about this repeatedly.

To fix this, all references to the jboss.partition.udpPort system property need to be removed from this file. Specifically, lines 70 and 71:

#define the jgroups UDP port (multicast) for clustering
JBOSS_UDP_PORT=${JBOSS_UDP_PORT:-"45566"}

and lines 153 and 154:

[ "x$JBOSS_UDP_PORT" != "x" ] && \
JAVA_OPTS="$JAVA_OPTS -Djboss.partition.udpPort=$JBOSS_UDP_PORT"

Line numbers may vary based on the specific init file because of manual edits and/or environment differences, but the line text should be the same.