Dawid Wysakowicz created FLINK-24868:
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Summary: Use custom serialization for storing checkpoint metadata
in CompletedCheckpointStore
Key: FLINK-24868
URL: https://issues.apache.org/jira/browse/FLINK-24868
Project: Flink
Issue Type: Improvement
Components: Runtime / Coordination
Reporter: Dawid Wysakowicz
We are using a java serialization for storing {{CompletedCheckpoint}} in
{{CompletedCheckpointStore}}. This makes maintaining backwards compatibility of
entries stored hard, even between minor versions. Maintaining this kind of
backwards compatibility is required for ever considering rolling upgrades.
In particular, we do have {{MetadataSerializer}} for storing checkpoints
metadata in a backwards-compatible way.
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