Red Hat Training

A Red Hat training course is available for JBoss Enterprise SOA Platform

9.6. Supported Crash Recovery Modes

Unless you are using transactions or a reliable message delivery protocol such as JMS, the JBoss Enterprise SOA Platform will only tolerate crash failures that do not result in total system failure and allow the application to reason without ambiguity about whether the end-points involved are still "alive". If services crash or shut down cleanly before receiving messages, then it is safe to use transports other than JMS.