Deploy TxnTestSSB bean (code below) into JBoss AS and run TxnTestSSBClient to invoke the bean. With jboss-5.1.0.GA the client correctly displays: hasTxn() returns: false With jboss-6.0.0.Final the client wrongly displays: hasTxn() returns: true Try adding a hasTxn() method to TxnTestSSB and have it call super.hasTxn(). The client now correctly displays: hasTxn() returns: false ===================== TxnTestSSBRemote.java ===================== import javax.ejb.Remote; @Remote public interface TxnTestSSBRemote { public boolean hasTxn(); } =============== TxnTestSSB.java =============== import javax.ejb.Stateless; import javax.ejb.TransactionAttribute; import javax.ejb.TransactionAttributeType; import javax.ejb.TransactionManagement; import javax.ejb.TransactionManagementType; @TransactionManagement(TransactionManagementType.CONTAINER) @TransactionAttribute(TransactionAttributeType.NOT_SUPPORTED) @Stateless public class TxnTestSSB extends TxnTestSSBBase implements TxnTestSSBRemote { } =================== TxnTestSSBBase.java =================== import javax.annotation.Resource; import javax.ejb.SessionContext; public class TxnTestSSBBase { @Resource SessionContext ctx; public boolean hasTxn() { try { ctx.getRollbackOnly(); return true; } catch (IllegalStateException e) { return false; } } } ===================== TxnTestSSBClient.java ===================== import java.util.Properties; import javax.naming.Context; import javax.naming.InitialContext; public class TxnTestSSBClient { public static void main(String[] args) throws Exception { Properties props = new Properties(); props.put(Context.INITIAL_CONTEXT_FACTORY,"org.jnp.interfaces.NamingContextFactory"); props.put(Context.PROVIDER_URL,"jnp://localhost:1099"); props.put("java.naming.factory.url.pkgs","org.jboss.naming:org.jnp.interfaces"); InitialContext ctx = new InitialContext(props); TxnTestSSBRemote remote = (TxnTestSSBRemote) ctx.lookup("TxnTestSSB/remote"); System.out.println("hasTxn() returns: " + remote.hasTxn()); } }