1. A cluster arrangement of a system, comprising: a first network; a plurality of data processing systems, each of said plural data processing systems forming an application node and having an operating system which is the operating system in each of said plural data processing systems, each said application node including an entity which is executed; an inspection node connected to the first network, the inspection node including the operating system and an inspection agent configured to manage reports received from each application node; and an application agent on the each application node, the application node comprising a service of the operating system and being started following initialization of the operating system on the each application node, the application agent being configured to: monitor and identify entities executed on the each application node; start a new entity or restart an executed entity which has been terminated prematurely on the each application node; assess and decide whether the new or restarted entity can be executed on the each application node; forward a request to execute the new or restarted entity to the application agents at all of the application nodes connected to the first network; report to the application agents at all of the application nodes connected to the network following an acceptance of the request to execute the new or restarted entity; and report to the application agents at all of the application nodes connected to the network if an application agent rejects the request to execute the new or restarted entity.