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https://issues.apache.org/jira/browse/FLINK-28843?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17576502#comment-17576502
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Yanfei Lei commented on FLINK-28843:
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[~frozen stone] Thanks for reporting this bug! I think your analysis is
correct, I had assumed that all IncrementalKeyedStateHandle were located in
/shared, and forgot the private handles of IncrementalKeyedStateHandle are
located in /chk-x.
> Failed to restore from changelog checkpoint in claim mode
> ---------------------------------------------------------
>
> Key: FLINK-28843
> URL: https://issues.apache.org/jira/browse/FLINK-28843
> Project: Flink
> Issue Type: Bug
> Components: Runtime / State Backends
> Affects Versions: 1.15.0, 1.15.1
> Reporter: Lihe Ma
> Assignee: Lihe Ma
> Priority: Critical
> Labels: pull-request-available
>
> # When native checkpoint is enabled and incremental checkpointing is enabled
> in rocksdb statebackend，if state data is greater than
> state.storage.fs.memory-threshold，it will be stored in a data file
> (FileStateHandle，RelativeFileStateHandle, etc) rather than stored with
> ByteStreamStateHandle in checkpoint metadata, like base-path1/chk-1/file1.
> # Then restore the job from base-path1/chk-1 in claim mode，using changelog
> statebackend，and the checkpoint path is set to base-path2, then new
> checkpoint will be saved in base-path2/chk-2, previous checkpoint file
> (base-path1/chk-1/file1) is needed.
> # Then restore the job from base-path2/chk-2 in changelog statebackend,
> flink will try to read base-path2/chk-2/file1, rather than the actual file
> location base-path1/chk-1/file1, which leads to FileNotFoundException and job
> failed.
>
> How to reproduce?
> # Set state.storage.fs.memory-threshold to a small value, like '20b'.
> # {{run
> org.apache.flink.test.checkpointing.ChangelogPeriodicMaterializationSwitchStateBackendITCase#testSwitchFromDisablingToEnablingInClaimMode}}
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