rkhachatryan opened a new pull request #11491: [FLINK-16513][checkpointing] Unaligned checkpoints: checkpoint metadata URL: https://github.com/apache/flink/pull/11491 ## What is the purpose of the change Currently, Flink only snapshots and stores operator state. For the Unaligned Checkpoints, channel state needs to be stored as well. This PR adds channel state handles to checkpoint metadata and updates state assignment on recovery. ## Brief change log - some pre-requisite refactorings - add channel state metadata to OperatorSubtaskState - adjust StateAssignmentOperation - adjust metadata serialization - adjust related classes ## Verifying this change This change is already covered by existing tests, such as: - CheckpointCoordinatorFailureTest - LocalStateForwardingTest - OperatorSnapshotFinalizerTest - OperatorSnapshotFuturesTest - RestoreStreamTaskTest - StreamTaskTest ## Does this pull request potentially affect one of the following parts: - Dependencies (does it add or upgrade a dependency): no - The public API, i.e., is any changed class annotated with `@Public(Evolving)`: no - The serializers: no (not user-facing) - The runtime per-record code paths (performance sensitive): no - Anything that affects deployment or recovery: JobManager (and its components), Checkpointing, Kubernetes/Yarn/Mesos, ZooKeeper: yes - The S3 file system connector: no ## Documentation - Does this pull request introduce a new feature? no - If yes, how is the feature documented? not applicable
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