Piotr Nowojski created FLINK-19680:
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Summary: Add CheckpointBarrierAnnouncement priority message
Key: FLINK-19680
URL: https://issues.apache.org/jira/browse/FLINK-19680
Project: Flink
Issue Type: Sub-task
Components: Runtime / Checkpointing
Affects Versions: 1.12.0
Reporter: Piotr Nowojski
Assignee: Piotr Nowojski
Fix For: 1.12.0
When an aligned checkpoint barrier arrives in an input channel, we should
enqueue at the head of the queue priority event, announcing arrival of the
checkpoint barrier.
Such announcement event should be propagated to the `CheckpointBarrierHandler`.
Based on that, `CheckpointBarrierHandler` will be able to implement logic of
time outing from aligned checkpoint to unaligned checkpoint.
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