[jira] [Created] (FLINK-18404) Make unaligned checkpoints rescalable

[Shang Yuanchun (Jira)]

Arvid Heise created FLINK-18404:
-----------------------------------

             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).



--
This message was sent by Atlassian Jira
(v8.3.4#803005)