Use a combination of FD and FD_SOCK in the default JGroups protocol stack. -------------------------------------------------------------------------- Key: JBAS-3004 URL: http://jira.jboss.com/jira/browse/JBAS-3004 Project: JBoss Application Server Issue Type: Task Security Level: Public(Everyone can see) Components: Clustering Reporter: Brian Stansberry Assigned To: Brian Stansberry Fix For: JBossAS-5.0.0.Beta, JBossAS-4.0.5.CR1 FD_SOCK to promptly detect most issues. FD with a long (say 2 min) timeout as a backup to detect things like machine/switch crashes where FD_SOCK isn't aware of the TCP connection failure. Long timeout avoids false suspicions.