I have made AutomaticFailoverWithDiscoveryTest to use real files on the journal. If you make it use NullPersistence, and place testFailover on a loop, messages will be duplicated. I moved the setupGroup to a super class (FailoverTestBase). To replicate this issue, change the setUp to: protected void setUp() throws Exception | { | super.setUp(); | setupGroupServers(true, "bc1", 5432, groupAddress, groupPort); | } | View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4219677#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...