It is not used in the scheduled listener case, but for all other listeners it will be. If you use a POJO as an action then a new instance will be created for every message passing through the pipeline. This is for historical reasons. If your action implements the ActionPipelineProcessor or ActionLifecycle interfaces then there will be a single instance created for each pipeline (incoming transport). The action must be thread safe as it is possible for multiple threads to access it concurrently. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4188069#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...