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https://issues.apache.org/jira/browse/FLINK-25872?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17534881#comment-17534881
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Piotr Nowojski commented on FLINK-25872:
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I would still wait and see how many people would be using changelog and if
indeed they complain about having to take a savepoint. I have a feeling that
the set of users that falls into those two categories might be so small,
especially initially, that it's not worth increasing the complexity of the
system.
> Restoring from non-changelog checkpoint with changelog state-backend enabled
> in CLAIM mode discards state in use
> ----------------------------------------------------------------------------------------------------------------
>
> Key: FLINK-25872
> URL: https://issues.apache.org/jira/browse/FLINK-25872
> Project: Flink
> Issue Type: Bug
> Components: Runtime / Checkpointing, Runtime / State Backends
> Reporter: Yun Tang
> Assignee: Yanfei Lei
> Priority: Major
> Labels: pull-request-available
> Fix For: 1.16.0
>
>
> If we restore from checkpoint with changelog state-backend enabled in
> snapshot CLAIM mode, the restored checkpoint would be discarded on subsume.
> This invalidates newer/active checkpoints because their materialized part is
> discarded (for incremental wrapped checkpoints, their private state is
> discarded). This bug is like FLINK-25478.
>
> Design doc:
> [https://docs.google.com/document/d/1KSFWc0gL7HkhC-JNrnsp06TLnsTmZOTHITQDcGMo0cI/edit?usp=sharing,]
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