[ https://issues.jboss.org/browse/JGRP-2207?page=com.atlassian.jira.plugin.... ] Bela Ban commented on JGRP-2207: -------------------------------- Got you: you want the second member's JOIN request to fail and it to terminate rather than forming a separate cluster. Again, while I don't think forming a separate cluster is a bad idea (remember: the main goal is for the second member *not* to join the first member's cluster), I changed the code to: {code:java} AuthHeader auth_hdr=msg.getHeader(id); if(auth_hdr == null) { sendRejectionMessage(gms_hdr.getType(), msg.src(), "no AUTH header found in message"); throw new IllegalStateException(String.format("found %s from %s but no AUTH header", gms_hdr, msg.src())); } {code} So now a rejection message is sent to the joiner before throwing the exception, which is a minimal non-invasive change. WDYT? -- This message was sent by Atlassian JIRA (v7.2.3#72005)