Job processing apparatus

A printing control apparatus performs print processing by sequentially spooling print data received from a data processing apparatus via a predetermined communication medium in units of a job and the spooled print data is analyzed in units of a job. The printing control apparatus spools the print data in a memory. When print processing is interrupted during processing of print data which has been spooled in advance, an execution schedule of each spooled job is changed so as to preferentially execute a job of spooled print data capable of being printed by analyzing the cause of the interruption of printing.