[FLINK-25256][streaming] Externally induced sources replay barriers received over RPC instead of inventing them out of thin air. [1.15] #19214
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added 3 commits
March 23, 2022 14:09
…eceived over RPC instead of inventing them out of thin air. This change preserves the CheckpointOptions and properly integrates user-triggered snapshots and workflows with more than one source. The externally induced source now merely delays the barrier instead of being able to insert one at a whim which would never work in aforementioned setups.
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Unchanged backport of #19138.