The server exit can update the SXPL_RespBind field to indicate who has responsibility for sending the response (a response bind). Response binds are relevant in cases where the server exit routine arranges for some other work unit to send the results of the request to the client. If the entity responsible for sending the response fails before doing so, the response bind allows XCF to recognize that the failed entity is no longer capable of sending the response. In such cases, XCF sends an acknowledgment to the originator indicating that the responder terminated before it could send the results. Without this acknowledgment, the client request continues to wait for the expected reply until the request times out. See Defining response binds.