Described herein are systems and methods for improving concurrency of a request manager for use in an application server or other environment. A request manager receives a request, and upon receiving the request the request manager associates a token with the request. A reference to the request is enqueued in each of a plurality of queues, wherein each queue stores a local copy of the token. A first reference to the request is dequeued from a particular queue, wherein when the first reference to the request is dequeued, the token is modified to create a modified token. Thereafter the request is processed. When other references to the request are dequeued from other queues, the other references to the request are discarded.