[flink] Support unaligned checkpoints for coordinator commit - #9451
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JingsongLi merged 1 commit intoAug 28, 2026
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leaves12138
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Aug 28, 2026
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Purpose
FlinkSink currently rejects unaligned checkpoints for every streaming commit path. Coordinator commit performs the commit in the writer's OperatorCoordinator and can support unaligned checkpoints without relying on the classic global committer operator.
This PR allows unaligned checkpoints only when coordinator commit is enabled. The classic operator-commit path continues to reject unaligned checkpoints, and all paths still require EXACTLY_ONCE checkpointing.
The tests also cover the actual append-table use case with
data-evolution.enabled,row-tracking.enabled, bucket-unaware mode, and coordinator commit enabled.Tests
mvn -pl paimon-flink/paimon-flink-common -Pflink1 -DwildcardSuites=none -Dtest=FlinkSinkTest,CoordinatorCommitITCase clean test(Java 8)mvn -pl paimon-flink/paimon-flink-common -Pflink2 -DwildcardSuites=none -Dtest=FlinkSinkTest,CoordinatorCommitITCase test(Java 11)Both runs passed 15 tests with no failures.