No, it doesn't; periodic snapshots are not needed in DataSet programs, as DataSets are of finite size and failed partitions can be replayed completely.
On Thu, Jul 9, 2015 at 2:43 PM, 马国维 <maguo...@outlook.com> wrote: > hi, everyoneThe doc say Flink Streaming use "Barriers" to ensure > "exactly once."Does the DataSet job use the same mechanism to ensue > "exactly once" if a map task is failed?thanks >
