High Quality Content by WIKIPEDIA articles! Sorcerer`s Apprentice Syndrome (SAS) is a particularly bad network protocol flaw, discovered in the original versions of TFTP. It was named after the "Sorcerer`s Apprentice" segment of the animated film Fantasia, because the details of its operation closely resemble the disaster that befalls the sorcerer`s apprentice: the problem resulted in an ever-growing replication of every packet in the transfer. The problem occurred because of a known failure mode of the internetwork which, through a mistake on the part of the protocol designers, was not taken into account when the protocol was designed; it interacted with several details of the mechanisms of TFTP to produce SAS.