This section provides an overview of what apache-flink is, and why a developer might want to use it.

It should also mention any large subjects within apache-flink, and link out to the related topics. Since the Documentation for apache-flink is new, you may need to create initial versions of those related topics.

Checkpoints are only useful when a failure happens in the cluster, for example when a taskmanager fails. They do not persist after the job itself failed or was canceled.

To be able to resume a stateful job after failure/cancellation, have a look at savepoints or externalized checkpoints (flink 1.2+).