Arvid Heise created FLINK-18404:
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Summary: Make unaligned checkpoints rescalable
Key: FLINK-18404
URL: https://issues.apache.org/jira/browse/FLINK-18404
Project: Flink
Issue Type: Improvement
Components: Runtime / Checkpointing
Affects Versions: 1.12.0
Reporter: Arvid Heise
Currently, the in-flight data of unaligned checkpoints is not handled properly
in rescaling scenarios. We guarded with a fail-safe exception against it. A
proper rescaling support would increase the benefits of unaligned checkpoints.
To rescale in-flight data, the state shard needs to be redistributed across all
new assigned tasks and some additional filter needs to ensure that only the
relevant key-groups are actually recovered (or processed).
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