Myasuka commented on issue #9386: [FLINK-13601][tests] Harden RegionFailoverITCase by recording info when checkpoint just completed URL: https://github.com/apache/flink/pull/9386#issuecomment-543192776 @zentol If current `lastCompletedCheckpointId` is `chk-3`, when task starts checkpointing, it would put `snapshotIndicesOfSubTask` with newer checkpoint `chk-4`. Then, the job fails before the checkpoint is completed, and the `chk-4` would not update in `TestingCompletedCheckpointStore` as `lastCompletedCheckpointId`. When the job recovers, it would verify with previous last checkpoint id `chk-3` from `snapshotIndicesOfSubTask` instead of `chk-4` [(ref here)](https://github.com/apache/flink/pull/9386/files#diff-bfb5100206bccf135ef75dc3df04ff88L310) , which means we could still verify the state correctness as well.
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