dylanwong250 opened a new pull request, #52985:
URL: https://github.com/apache/spark/pull/52985
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### What changes were proposed in this pull request?
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This PR modifies ChecksumCheckpointFileManager to fall back to the
underlying CheckpointFileManager when the target path exists but the checksum
file does not. This prevents failures in checkpoint recovery scenarios where
checksum validation cannot be performed.
### Why are the changes needed?
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Consider the case using STATE_STORE_CHECKPOINT_FORMAT_VERSION = 1 when a
batch fails but state files are written. If on the next run, we try to upload
both a new state file and a file checksum, the file could fail to be uploaded
but the file checksum is uploaded successfully. This would lead to a situation
where the old file could be loaded and compared with the new file checksum,
which would fail the checksum verification. This issue does not happen when
STATE_STORE_CHECKPOINT_FORMAT_VERSION = 2 since each batch run unique ids will
be created.
### Does this PR introduce _any_ user-facing change?
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- Added unit tests in ChecksumCheckpointFileManagerSuite to verify fallback
behavior
- Added a failure injection test in RocksDBCheckpointFailureInjectionSuite
to simulate how this error is caused
### Was this patch authored or co-authored using generative AI tooling?
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No
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