[jira] [Created] (FLINK-4976) Add a way to abort in flight checkpoints

[Shang Yuanchun (Jira)]

Stephan Ewen created FLINK-4976:
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             Summary: Add a way to abort in flight checkpoints
                 Key: FLINK-4976
                 URL: https://issues.apache.org/jira/browse/FLINK-4976
             Project: Flink
          Issue Type: New Feature
          Components: State Backends, Checkpointing
    Affects Versions: 1.1.3
            Reporter: Stephan Ewen
            Assignee: Stephan Ewen
             Fix For: 1.2.0, 1.1.4


Currently, a started checkpoint alignment can only be dissolved if a newer checkpoint comes, or an input becomes closed.

To cleanly signal downstream tasks that a checkpoint will not be completed, we need to introduce {{CancellationBarriers}} that can be injected into the stream and dissolve a pending stream alignment and notify the task that a pending checkpoint was skipped.



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