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https://issues.apache.org/jira/browse/FLINK-29157?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Congxian Qiu reassigned FLINK-29157:
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Assignee: Yanfei Lei (was: Roman Khachatryan)
> Clarify the contract between CompletedCheckpointStore and SharedStateRegistry
> -----------------------------------------------------------------------------
>
> Key: FLINK-29157
> URL: https://issues.apache.org/jira/browse/FLINK-29157
> Project: Flink
> Issue Type: Technical Debt
> Components: Runtime / Checkpointing
> Affects Versions: 1.16.0, 1.15.2
> Reporter: Roman Khachatryan
> Assignee: Yanfei Lei
> Priority: Minor
> Labels: pull-request-available
> Fix For: 1.17.0, 1.15.3, 1.16.1
>
>
> After FLINK-24611, CompletedCheckpointStore is required to call
> SharedStateRegistry.unregisterUnusedState() on checkpoint subsumption and
> shutdown.
> Although it's not clear whether CompletedCheckpointStore is internal there
> are in fact external implementations (which weren't updated accordingly).
>
> After FLINK-25872, CompletedCheckpointStore also must call
> checkpointsCleaner.cleanSubsumedCheckpoints.
>
> Another issue with a custom implementation was using different java objects
> for state for CheckpointStore and SharedStateRegistry (after FLINK-24086).
>
> So it makes sense to:
> * clarify the contract (different in 1.15 and 1.16)
> * require using the same checkpoint objects by SharedStateRegistryFactory
> and CompletedCheckpointStore
> * mark the interface(s) as PublicEvolving
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