In this method, a first information processing apparatus in a first system identifies a second system that performs a first processing on behalf of the first system when an abnormality occurs in the first system, and transmits a first request that includes data concerning resources used to perform the first processing to a second information processing apparatus in the second system. Upon detecting an abnormality in the second system, the first information processing apparatus identifies a third system other than the second system, transmits a second request that includes data concerning resources used to perform the first processing to a third information processing apparatus in the third system, and transmits a third request to release resources secured for the first system to the second information processing apparatus in the second system, upon detecting return of the second system.