the comment is : if the client is associated with a transaction T1,and the instance is not associated with a transaction,the container....... ..This can never happen for a Message-driven Bean.
Why is not admissible for MDB this is confuse for me!!!
Howdy -- Message Driven Beans do not officially have "clients", so they can never be invoked within a client's transaction. The Container invokes the MDB, and the Container is not considered a client. So any transaction in a MDB always starts *with* the bean.