Start standlone-ha.xml
/subsystem=jgroups/channel=ee/protocol=UDP:read-resource(include-runtime
Client:
{
"outcome" => "failed",
"rolled-back" => true
}

Server:
12:01:32,541 ERROR [org.jboss.as.controller.management-operation] (management-handler-thread - 1) WFLYCTL0013: Operation ("read-attribute") failed - address: ([
("subsystem" => "jgroups"),
("channel" => "ee"),
("protocol" => "UDP")
]) - failure description: "newValue is null"