Aljoscha Krettek created FLINK-4381:
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Summary: Refactor State to Prepare For Key-Group State Backends
Key: FLINK-4381
URL: https://issues.apache.org/jira/browse/FLINK-4381
Project: Flink
Issue Type: Sub-task
Components: Streaming
Reporter: Aljoscha Krettek
In order to use the new {{KeyGroupAssigner}}/{{key group sharding}} the state
backends need no be able to deal with key groups. For this, we first need to
refactor the state abstractions. Specifically, this touches how key-grouped
state should be stored and also how state is sent to the
{{CheckpointCoordinator}} and how it is stored.
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