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Posted to dev@flink.apache.org by "zhijiang (JIRA)" <ji...@apache.org> on 2019/05/10 07:06:00 UTC

[jira] [Created] (FLINK-12474) UnionInputGate should be notified when closing SingleInputGate by canceler thread

zhijiang created FLINK-12474:
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             Summary: UnionInputGate should be notified when closing SingleInputGate by canceler thread
                 Key: FLINK-12474
                 URL: https://issues.apache.org/jira/browse/FLINK-12474
             Project: Flink
          Issue Type: Improvement
          Components: Runtime / Network
            Reporter: zhijiang


If task is being canceled, the `SingleInputGate` would be closed by canceler thread. If the `SingleInputGate` is waiting for buffer, `inputChannelWithData` would be notified to wake task thread to exit early. But if the `UnionInputGate` is waiting for buffer, task thread is still stucking in wait when `SingleInputGate` is closed until cancel timeout.

To make task exit early in this case, we could make `SingleInputGate` further notify `UnionInputGate` after it is closed, then it could also wake task thread to exit during canceling.



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