Abstract: A processing system in which a service is executed by a current job using resources under a predetermined environment includes a job activating instruction unit for outputting an activation instruction to activate a new job operating under a changed environment, a job generation unit for generating the new job and for assigning a waiting attribute to the new job so that the new job is in a waiting condition, in response to the activation instruction from the job activating instruction unit, a job replacing instruction unit for outputting a replacement instruction to replace the current job to the new job being in the waiting condition, a job replacement unit for selecting resources to be used in the new job from among the resources used in the current job, for assigning selected resources to the new job, and for releasing the waiting condition from the new job, in response to the replacement instruction from the job replacing instruction unit, and a current job withdrawing unit for withdrawing the current job