Flink: Fix non-deterministic operator UIDs in DynamicIcebergSink#15687
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pvary merged 1 commit intoapache:mainfrom Mar 20, 2026
Merged
Flink: Fix non-deterministic operator UIDs in DynamicIcebergSink#15687pvary merged 1 commit intoapache:mainfrom
pvary merged 1 commit intoapache:mainfrom
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The pre-commit topology operator UID included a random UUID (sinkId), which changed on every sink instantiation. This prevented Flink from restoring state from checkpoints/savepoints because operator UIDs didn't match across full redeploys. This did not affect simple failures / restarts because the JobGraph is not re-generated then. Use a fixed suffix for the UID, consistent with the other operators (generator, updater, sink) which already use deterministic UIDs. The sinkId is still used in the committer for file separation. I deliberately did not change the UID syntax. Despite the bug, users will still be able to restore state, e.g. via Flink's `allowNonRestoredState`, but we must keep the stateful operators UUIds like the committer consistent.
pvary
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Merged to main. |
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Thanks @pvary! |
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The pre-commit topology operator UID included a random UUID (sinkId), which changed on every sink instantiation. This prevented Flink from restoring state from checkpoints/savepoints because operator UIDs didn't match across full redeploys. This did not affect simple failures / restarts because the JobGraph is not re-generated then.
Use a fixed suffix for the UID, consistent with the other operators (generator, updater, sink) which already use deterministic UIDs. The sinkId is still used in the committer for file separation.
I deliberately did not change the UID syntax. Despite the bug, users will still be able to restore state, e.g. via Flink's
allowNonRestoredState, but we must keep the stateful operators UUIds like the committer consistent.