DECENTRALIZED DATA PROCESSING DEVICE, DECENTRALIZED DATA PROCESSING METHOD, AND DECENTRALIZED DATA PROCESSING PROGRAM

摘要

PROBLEM TO BE SOLVED: To detect deadlock even in a case where there is a possibility that a terminal and a control object device cannot communicate with each other.SOLUTION: A resource circulation graph is configured by a plurality of nodes each of which corresponds to one of a plurality of control object devices getting coupled with each other with a first link extending from a first node of which a first terminal has a control right toward a second node of which the first terminal has a control right and a second link extending from a third node of which a second terminal has a control right toward a fourth node which is waiting for the second terminal to be given a control right of the fourth node. The resource circulation graph includes: a network reception unit that receives a deadlock detection message transferred between a plurality of control object devices so as to be transferred between nodes along the first link and the second link; and a deadlock determination unit that determines whether deadlock is occurring or not on the basis of history of deadlock detection messages.