[FLINK-38267] Only call channel state rescaling logic for exchange with channel state to avoid UnsupportedOperationException #26937
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…elated logic in TaskStateAssignment
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… exchange with channel state to avoid UnsupportedOperationException
…tRescaleWithMixedExchangesITCase.testRescaleFromUnalignedCheckpoint When one task has multiple inputs, and the unaligned checkpoint will be disabled for all inputs once one input exchange does not support unaligned checkpoint. It caused no inflight buffers, but UnalignedCheckpointRescaleWithMixedExchangesITCase.testRescaleFromUnalignedCheckpoint always wait for checkpoint with inflight buffers. Explicitly specifying rebalance can avoid the forward exchange.
rkhachatryan
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Aug 29, 2025
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Backport #26931 to 1.20
[FLINK-38267] Only call channel state rescaling logic for exchange with channel state to avoid UnsupportedOperationException