[jira] [Updated] (FLINK-17372) SlotManager should expose total required resources

["Xintong Song (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/FLINK-17372?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Xintong Song updated FLINK-17372:
---------------------------------
        Parent: FLINK-20988
    Issue Type: Sub-task  (was: Improvement)

> SlotManager should expose total required resources
> --------------------------------------------------
>
>                 Key: FLINK-17372
>                 URL: https://issues.apache.org/jira/browse/FLINK-17372
>             Project: Flink
>          Issue Type: Sub-task
>          Components: Runtime / Coordination
>    Affects Versions: 1.11.0
>            Reporter: Till Rohrmann
>            Priority: Major
>             Fix For: 1.13.0
>
>
> Currently, the {{SlotManager}} exposes the set of required resources which have not been fulfilled via {{SlotManager.getRequiredResources}}. The idea of this function is to allow the {{ResourceManager}} to decide whether new pods/containers need to be started or not.
> The problem is that once a resource has been registered at the {{SlotManager}} it will decrease the set of required resources. If now a pod/container fails, then the {{ResourceManager}} won't know whether it needs to restart the container or not.
> In order to simplify the interaction, I propose to let the {{SlotManager}} announce all of its required resources (pending + registered resources). That way the {{ResourceManager}} only needs to compare the set of required resources with the set of pending and allocated containers/pods.



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