I've found. It is the fact that is using the IPV6 stack. So I guess either the JDK or JGroups isn't handling 127.0.0.1 as loopback for IPV6? The following patch solves the problem: | [ejort@warjort testsuite]$ svn diff | Index: imports/server-config.xml | =================================================================== | --- imports/server-config.xml (revision 66950) | +++ imports/server-config.xml (working copy) | @@ -87,6 +87,7 @@ | <jvmarg value="-XX:MaxPermSize=512m" /> | <jvmarg value="-Xmx512m" /> | --> | + <sysproperty key="java.net.preferIPv4Stack" value="true" /> | <sysproperty key="java.endorsed.dirs" value="${jboss.dist}/lib/endorsed" /> | <sysproperty key="jgroups.udp.ip_ttl" value="${jbosstest.udp.ip_ttl}" /> | </server> | View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4103844#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...