[jira] [Created] (FLINK-2519) BarrierBuffers get stuck infinitely when some inputs end early

[Shang Yuanchun (Jira)]

Stephan Ewen created FLINK-2519:
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             Summary: BarrierBuffers get stuck infinitely when some inputs end early
                 Key: FLINK-2519
                 URL: https://issues.apache.org/jira/browse/FLINK-2519
             Project: Flink
          Issue Type: Bug
          Components: Streaming
    Affects Versions: 0.10
            Reporter: Stephan Ewen
            Assignee: Stephan Ewen
            Priority: Blocker
             Fix For: 0.10


When some sources exit early, the barrier buffer may start an alignment, but will never complete it, because some inputs never deliver a checkpoint barrier.

[FLINK-2515] mitigates most of the problem, by not starting checkpoints any more when some sources already finished. When a checkpoint is started while a source is finishing, the barrier buffer may still align infinitely.



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