Yun Tang created FLINK-26985:
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Summary: With legacy restore mode, incremantal checkpoints would
be deleted by mistake
Key: FLINK-26985
URL: https://issues.apache.org/jira/browse/FLINK-26985
Project: Flink
Issue Type: Bug
Components: Runtime / Checkpointing
Affects Versions: 1.15.0
Reporter: Yun Tang
Before flink-1.15, the restored checkpoint would be regsiterd and not discard
on subsume, which means the restored incremental checkpoint would have one more
reference counting to avoid discard.
However, after state registry refactored, we could delete artificats in the
restored incremental checkpoint with legacy restore mode.
The error could be reproduced via
{{ResumeCheckpointManuallyITCase#testExternalizedIncrementalRocksDBCheckpointsStandalone}}
in my [local branch|https://github.com/Myasuka/flink/tree/legacy-error].
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