[jira] [Created] (FLINK-4904) Add a limit for how much data may be spilled in checkpoint alignments

[Shang Yuanchun (Jira)]

Stephan Ewen created FLINK-4904:
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             Summary: Add a limit for how much data may be spilled in checkpoint alignments
                 Key: FLINK-4904
                 URL: https://issues.apache.org/jira/browse/FLINK-4904
             Project: Flink
          Issue Type: Improvement
          Components: State Backends, Checkpointing
    Affects Versions: 1.1.3
            Reporter: Stephan Ewen
            Assignee: Stephan Ewen
             Fix For: 1.2.0, 1.1.4


This should act as a safety net in cases where the sources or the network misbehave or cannot start a checkpoint. The alignment phases would then simply abort after a while, signaling the checkpoint to be incomplete.

This needs the following changes
  - Add "cancel barriers" that are sent to downstream tasks
  - Barrier Buffer and Barrier Tracker need to handle the "cancel barriers"
  - Tasks need to react to an aborted checkpoint by responding with an appropriate message



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