1. A method for generating a checkpoint image for warm standby, the method comprising: a computing device executing a plurality of threads of an application during initialization of the application, wherein the application comprises a set of processes; the computing device blocking execution of the plurality of threads, wherein the blocking execution of at least one thread of the plurality of threads comprises blocking execution of the at least one thread in response to detecting a reference that is external to the set of processes, wherein the reference comprises the at least one thread attempting to communicate via one of a socket and an inter-process communication; and the computing device generating, in response to the blocking execution of the plurality of threads, the checkpoint image of the set of processes to enable execution of the application via a second computing device.