Stefan Richter created FLINK-6984:
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Summary: Do not recover CompletedCheckpointStore on every restore
Key: FLINK-6984
URL: https://issues.apache.org/jira/browse/FLINK-6984
Project: Flink
Issue Type: Improvement
Components: State Backends, Checkpointing
Affects Versions: 1.2.1, 1.3.0, 1.4.0
Reporter: Stefan Richter
Currently, restoring the latest checkpoint always recovers the
{{CompletedCheckpointStore}} in
{{CheckpointCoordinator::restoreLatestCheckpointedState(...)}} by calling
{{completedCheckpointStore.recover(sharedStateRegistry)}}. I think this is not
required on every restore, but can happen only once when the JM becomes leader,
e.g. when the {{CheckpointCoordinator}} is created. This can avoid unnecessary
work and simplify the logic, e.g. for populating the {{SharedStateRegistry}},
and we could probably also move the ownership for {{SharedStateRegistry}} into
some {{AbstractCompletedCheckpontStore}}.
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