[jira] [Created] (FLINK-14228) The runtime support for Bounded[One|Multi]Input#endInput does not properly implement their semantics

[Shang Yuanchun (Jira)]

Haibo Sun created FLINK-14228:
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             Summary: The runtime support for Bounded[One|Multi]Input#endInput does not properly implement their semantics
                 Key: FLINK-14228
                 URL: https://issues.apache.org/jira/browse/FLINK-14228
             Project: Flink
          Issue Type: Bug
          Components: Runtime / Task
    Affects Versions: 1.9.0
            Reporter: Haibo Sun
             Fix For: 1.10.0


Currently, the runtime support implementation of {{Bounded[One|Multi]Input#endInput}} has the following problems:1.The runtime are propagating endInput immediately on the operator chain when input of the head operator is finished.Because some operators flush the buffered data in close, the downstream operators still receive records after executing endInput.This need the operator to flush the buffered data in "endInput" instead of "close", like the PRs for fixing issue#13491 and issue#13376.2.Timers are not taken into account.
 close tells the operator to finish all its processing and flush output (all remaining buffered data), while endInput indicates that no more data will arrive on some input of the operator. That is to say, for the non-tail operators on the operator chain, when the upstream operator is closed, the input of its downstream operator arrives at the end. So for an operator chain OP1 -> OP2 -> ... ,  the logic should be:



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