Stateless session bean
By definition, when interacting with a stateless session bean, there is no client-visible state associated with the bean. Every client request directed to a stateless session bean is independent of any previous request that was directed to the same bean. The container will maintain a pool of instances of stateless session beans of each type, and will provide an arbitrary instance of the appropriate bean type whenever each client request is received. It does not matter if the same actual bean instance is used for consecutive requests, or even if two consecutive requests are serviced by bean instances in the same appserver.