[jbossseam-issues] [JBoss JIRA] Closed: (JBSEAM-2264) @Observer with PostSetVariable produces Concurrent exceptions in a conversation scoped stateful bean

@Observer with PostSetVariable produces Concurrent exceptions in a conversation scoped stateful bean ---------------------------------------------------------------------------------------------------- Key: JBSEAM-2264 URL: http://jira.jboss.com/jira/browse/JBSEAM-2264 Project: JBoss Seam Issue Type: Bug Affects Versions: 2.0.0.GA Environment: java 6_u03, jboss-4.2.1GA, jboss-seam-2.0.0.GA Reporter: Dan Hinojosa A method with an @Observer that listens to a postSetVariable event: @Name("myModule") @Scope(ScopeType.CONVERSATION) @Stateful public class MyModule implements ModuleLocal, ModuleRemote { @Observer("org.jboss.seam.postSetVariable.foo") public void process() { /* Do something */ } } produces a stack trace: [SeamPhaseListener] uncaught exception javax.el.ELException: javax.ejb.EJBTransactionRolledbackException: no concurrent calls on stateful bean 'jboss.j2ee:service=EJB3,name=MyModule' (EJB3 4.3.13) According to 3.1.10. Concurrency model of the 2.0.0 documentation: Finally, Seam enforces a single thread /per conversation per process/ model for the conversation context by serializing concurrent requests in the same long-running conversation context. The two 'per' is kind of confusing, but it seems that since Seam is serializing concurrent requests, this issue should not occur. Will create demo app shortly.