[ https://issues.jboss.org/browse/CDI-729?page=com.atlassian.jira.plugin.sy... ] Martin Kouba commented on CDI-729: ---------------------------------- Well, observers are not designed to return anything. If you return some object it is just ignored. The reason is that observers were designed for decoupled communication. Ideally, observers should NOT depend on each other and emitters should NOT depend on observers either. In your example, the observer which saves the entity could throw an exception if something goes wrong so that the {{CompletionStage}} returned from {{fire()}} would end up exceptionally. Of course, if you need to perform the save action asynchronously you'd probably have to fire another async event when it's done and declare another async observer for this particular event. -- This message was sent by Atlassian JIRA (v7.5.0#75005)