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From "Weiwei Yang (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-9580) Fulfilled reservation information in assignment is lost when transferring in ParentQueue#assignContainers
Date Mon, 03 Jun 2019 15:12:00 GMT

    [ https://issues.apache.org/jira/browse/YARN-9580?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16854697#comment-16854697
] 

Weiwei Yang commented on YARN-9580:
-----------------------------------

[~Tao Yang], thanks for the patch, it makes sense to me. +1.

> Fulfilled reservation information in assignment is lost when transferring in ParentQueue#assignContainers
> ---------------------------------------------------------------------------------------------------------
>
>                 Key: YARN-9580
>                 URL: https://issues.apache.org/jira/browse/YARN-9580
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: capacityscheduler
>            Reporter: Tao Yang
>            Assignee: Tao Yang
>            Priority: Major
>         Attachments: YARN-9580.001.patch
>
>
> When transferring assignment from child queue to parent queue, fulfilled reservation
information including fulfilledReservation and fulfilledReservedContainer in assignment is
lost.
> When multi-nodes enabled, this lost can raise a problem that allocation proposal is generated
but can't be accepted because there is a check for fulfilled reservation information in FiCaSchedulerApp#commonCheckContainerAllocation,
this endless loop will always be there and the resource of the node can't be used anymore.
> In HB-driven scheduling mode, fulfilled reservation can be allocated via another calling
stack: CapacityScheduler#allocateContainersToNode -->  CapacityScheduler#allocateContainerOnSingleNode
--> CapacityScheduler#allocateFromReservedContainer, in this way assignment can be generated
by leaf queue and directly submitted, I think that's why we hardly find this problem before.



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