[jira] [Closed] (FLINK-11574) Make StreamTask properly handle the DRAIN message.

["Kostas Kloudas (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/FLINK-11574?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Kostas Kloudas closed FLINK-11574.
----------------------------------
    Resolution: Invalid

> Make StreamTask properly handle the DRAIN message.
> --------------------------------------------------
>
>                 Key: FLINK-11574
>                 URL: https://issues.apache.org/jira/browse/FLINK-11574
>             Project: Flink
>          Issue Type: Sub-task
>          Components: Core, Streaming, TaskManager
>    Affects Versions: 1.8.0
>            Reporter: Kostas Kloudas
>            Assignee: Kostas Kloudas
>            Priority: Major
>             Fix For: 1.8.0
>
>
> In this case, the {{StreamTask}} has to;
> - send {{MAX_WATERMARK}} so that timers fire
> - launch the checkpointing process
> - wait until also for the checkpoint notification callback to be successfully executed
> - make sure no elements are processed by downstream operators (req. for exactly-once with idempotent updates)
> -  call {{close()}}
> - let the job go gracefully to {{FINISHED}}



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