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Posted to issues@flink.apache.org by "ravikirankalal (via GitHub)" <gi...@apache.org> on 2026/10/07 20:46:22 UTC

[PR] [FLINK-40476][docs] Clarify that the Changelog state backend requires CLAIM restore mode [flink]

ravikirankalal opened a new pull request, #29427:
URL: https://github.com/apache/flink/pull/29427

   ## What is the purpose of the change
   
   The Changelog state backend does not support the `NO_CLAIM` restore mode, but the "Upgrading existing jobs" section says resuming from savepoints and checkpoints is supported without mentioning the claim mode. A Changelog-enabled job resumed in the default `NO_CLAIM` mode restores successfully and then fails its first checkpoint, because `AbstractChangelogStateBackend` does not override `StateBackend#supportsNoClaimRestoreMode()` and `StreamTask#checkForcedFullSnapshotSupport` rejects the forced full checkpoint.
   
   ## Brief change log
   
     - "Enabling Changelog" steps now say to resume in `CLAIM` mode
     - Added a warning describing the failure and how to set `execution.state-recovery.claim-mode` / `-claimMode CLAIM`
     - Fixed the stale `execution-savepoint-restore-mode` anchor in the limitations list
     - Same changes applied to the Chinese page
   
   ## Verifying this change
   
   This change is a trivial rework / code cleanup without any test coverage (documentation only).
   
   ## 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
     - The runtime per-record code paths (performance sensitive): no
     - Anything that affects deployment or recovery: JobManager (and its components), Checkpointing, Kubernetes/Yarn, ZooKeeper: no
     - 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
   
   ---
   
   ##### Was generative AI tooling used to co-author this PR?
   
   - [X] Yes (please specify the tool below)
   
   Generated-by: Claude Opus 5.5
   


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Re: [PR] [FLINK-40476][docs] Clarify that the Changelog state backend requires CLAIM restore mode [flink]

Posted by "ravikirankalal (via GitHub)" <gi...@apache.org>.
ravikirankalal commented on PR #29427:
URL: https://github.com/apache/flink/pull/29427#issuecomment-6249871272

   @flinkbot run azure


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Re: [PR] [FLINK-40476][docs] Clarify that the Changelog state backend requires CLAIM restore mode [flink]

Posted by "ravikirankalal (via GitHub)" <gi...@apache.org>.
ravikirankalal commented on PR #29427:
URL: https://github.com/apache/flink/pull/29427#issuecomment-6063883540

   @flinkbot run azure


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Re: [PR] [FLINK-40476][docs] Clarify that the Changelog state backend requires CLAIM restore mode [flink]

Posted by "flinkbot (via GitHub)" <gi...@apache.org>.
flinkbot commented on PR #29427:
URL: https://github.com/apache/flink/pull/29427#issuecomment-6046908130

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   ## CI report:
   
   * b2244cd0fadd5b34da3f73742c8c6ebcd55b343e UNKNOWN
   
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     The @flinkbot bot supports the following commands:
   
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