[jira] [Assigned] (FLINK-20721) Remove unknown input channels and process to update partitions

["Till Rohrmann (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/FLINK-20721?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Till Rohrmann reassigned FLINK-20721:
-------------------------------------

    Assignee: Zhu Zhu

> Remove unknown input channels and process to update partitions
> --------------------------------------------------------------
>
>                 Key: FLINK-20721
>                 URL: https://issues.apache.org/jira/browse/FLINK-20721
>             Project: Flink
>          Issue Type: Sub-task
>          Components: Runtime / Coordination, Runtime / Network
>    Affects Versions: 1.13.0
>            Reporter: Zhu Zhu
>            Assignee: Zhu Zhu
>            Priority: Major
>              Labels: pull-request-available
>             Fix For: 1.13.0
>
>
> With the latest pipelined region scheduling, Flink no longer launch a task before knowing the locations of all the partitions it consumes. `scheduleOrUpdateConsumers` is no longer needed and is removed in FLINK-20439.
> Unknown input channels and the process to update it is also no longer needed. I'd propose to remove them and the benefits are:
> 1. simplifying the code of both scheduler and shuffle components
> 2. simplifying interfaces of ShuffleEnvironment and ShuffleDescriptor 
> 3. ensure the assumptions in InputGate#resumeConsumption() implementations
> 4. allow to remove ScheduleMode#allowLazyDeployment() and later completely remove ScheduleMode



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