1. A distributed processing system, comprising a plurality of mutually connected computers which execute a distributed batch application in a cooperative and distributed manner, wherein: each of the computers comprises a module loader which performs initialization processing by loading each module constituting the distributed batch application, a metadata management unit which acquires metadata containing a command of the initialization processing among each of the modules from a storage module provided in advance or from another computer, a file management unit which reads/writes a file in the storage module or in another computer, and an execution container which executes the distributed batch application; and the file management unit includes a function which checks whether or not an execution region containing an execution code of the module exists in the storage module after the module loader performs the initialization processing by the metadata and, when the execution region does not exist, loads the execution code from another computer and writes it as the execution region.