[jira] [Work started] (HIVE-25362) LLAP: ensure tasks with locality have a chance to adjust delay

["Panagiotis Garefalakis (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HIVE-25362?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Work on HIVE-25362 started by Panagiotis Garefalakis.
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> LLAP: ensure tasks with locality have a chance to adjust delay
> --------------------------------------------------------------
>
>                 Key: HIVE-25362
>                 URL: https://issues.apache.org/jira/browse/HIVE-25362
>             Project: Hive
>          Issue Type: Sub-task
>          Components: llap
>            Reporter: Panagiotis Garefalakis
>            Assignee: Panagiotis Garefalakis
>            Priority: Major
>              Labels: pull-request-available
>          Time Spent: 10m
>  Remaining Estimate: 0h
>
> HIVE-24914 introduced a short-circuit optimization when all nodes are busy returning DELAYED_RESOURCES and reseting locality delay for a given tasks.
> However, this may prevent tasks from adjusting their locality delay and being added to the DelayQueue leading sometimes to missed locality chances when all LLap resources are fully utilized.
> To address the issue we should handle the two cases separately.



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