Fault tolerance techniques for a plurality of nodes executing application thread groups include executing at least a portion of a first application thread group based on a delegation by a first node, wherein the first node delegates an execution of the first application thread group amongst the plurality of nodes and has a highest priority indicated by an ordered priority of the plurality of nodes. A failure of the first node can be identified based on the first node failing to respond to a message sent to it. A second node can then be identified as having a next highest priority indicated by the ordered priority such that the second node can delegate an execution of a second application thread group amongst the plurality of nodes.