[jira] [Created] (FLINK-8589) Add data polling method to InputGate

[Shang Yuanchun (Jira)]

Piotr Nowojski created FLINK-8589:
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             Summary: Add data polling method to InputGate
                 Key: FLINK-8589
                 URL: https://issues.apache.org/jira/browse/FLINK-8589
             Project: Flink
          Issue Type: Sub-task
            Reporter: Piotr Nowojski
            Assignee: Piotr Nowojski


This is a preparation for changes in data notifications, which will not be
 that strict as they are now. If we poll the data from InputGates in UnionInputGate instead of blockingly wait for them, we will be able to handle false data notifications that are inevitable in new flushing model.



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