[1996fanrui]

What is the purpose of the change

Checkpointing during recovery crashes the task when execution.checkpointing.aligned-checkpoint-timeout > 0 (see FLINK-40526). As the proper fix is non-trivial, this PR temporarily disables checkpointing during recovery in this case.

Brief change log

• CheckpointingOptions#isCheckpointingDuringRecoveryEnabled returns false when aligned-checkpoint-timeout > 0, with a TODO referencing FLINK-40526
• Document the limitation in execution.checkpointing.during-recovery.enabled and regenerate the config docs

Verifying this change

• Extended CheckpointingOptionsTest#testIsCheckpointingDuringRecoveryEnabled to cover a positive aligned checkpoint timeout

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: yes
• 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

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Was generative AI tooling used to co-author this PR?

• Yes (please specify the tool below)

Generated-by: Claude Opus 5.5

[1996fanrui]

Hey @RocMarshal , could you please help take a look this pr when you are available? thanks

[flinkbot]

CI report:

• 262f487 Azure: SUCCESS

Bot commands

The @flinkbot bot supports the following commands:

• @flinkbot run azure re-run the last Azure build

[RocMarshal]

Thanks @1996fanrui

[1996fanrui]

https://dev.azure.com/apache-flink/apache-flink/_build/results?buildId=80487&view=logs&j=fc5181b0-e452-5c8f-68de-1097947f6483&t=ef9c3241-2fba-55d4-1b6c-69193f53f3ba&l=26199

Hey @RocMarshal , is the CI failure caused by 2.4 branch cutting?

[RocMarshal]

@1996fanrui

It was fixed by 80b0144

Would you mind having a try on rebasing the latest master then re-push ?

[1996fanrui]

Thanks for the suggestion, it works. merging