Github user tillrohrmann commented on the issue:
https://github.com/apache/flink/pull/4763
Thanks for the review @zentol. I've addressed your comments: Reverted
change to `RestMapperUtils`, removed null branch from
`CheckpointStatistics#generateCheckpointStatistics`; Made the
`CheckpointStatistics#checkpointStatisticsPerTask` non nullable. If you have no
further objections, then I would like to merge this PR once Travis gives green
light.---
